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ICE: self.reachable_blocks.contains on valid code with -Zdump-mir-dataflow and macros #109832

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matthiaskrgr opened this issue Apr 1, 2023 · 1 comment · Fixed by #109847
Closed

ICE: self.reachable_blocks.contains on valid code with -Zdump-mir-dataflow and macros #109832

matthiaskrgr opened this issue Apr 1, 2023 · 1 comment · Fixed by #109847
Labels
C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@matthiaskrgr
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Code

enum wrapper<T> {
    wrapped(T),
}
pub fn main() {
     wrapper::wrapped(vec![1]);
}

Meta

You'll need debug assertions for this!

rustc --version --verbose:

rustc 1.70.0-nightly (5e1d3299a 2023-03-31)
binary: rustc
commit-hash: 5e1d3299a290026b85787bc9c7e72bcc53ac283f
commit-date: 2023-03-31
host: x86_64-unknown-linux-gnu
release: 1.70.0-nightly
LLVM version: 16.0.0

Error output

rustc treereduce.out -Zdump-mir=all -Zdump-mir-dataflow

warning: type `wrapper` should have an upper camel case name
 --> treereduce.out:1:6
  |
1 | enum wrapper<T> {
  |      ^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Wrapper`
  |
  = note: `#[warn(non_camel_case_types)]` on by default

warning: variant `wrapped` should have an upper camel case name
 --> treereduce.out:2:5
  |
2 |     wrapped(T),
  |     ^^^^^^^ help: convert the identifier to upper camel case (notice the capitalization): `Wrapped`
Backtrace 

thread 'rustc' panicked at 'assertion failed: self.reachable_blocks.contains(block)', /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/cursor.rs:98:9
stack backtrace:
   0:     0x7f8d01308c14 - std::backtrace_rs::backtrace::libunwind::trace::h67b163ebe8a31594
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f8d01308c14 - std::backtrace_rs::backtrace::trace_unsynchronized::h3c8281a1c2f00064
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f8d01308c14 - std::sys_common::backtrace::_print_fmt::h06cb971327b8c2e2
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f8d01308c14 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h4ee75b43d657a8f4
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f8d013b96eb - core::fmt::write::h2dac34aae88eac3a
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/fmt/mod.rs:1254:17
   5:     0x7f8d0134ccef - std::io::Write::write_fmt::h7ccd79b72628a6b8
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/io/mod.rs:1698:15
   6:     0x7f8d01308a15 - std::sys_common::backtrace::_print::hd635497dbec07356
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f8d01308a15 - std::sys_common::backtrace::print::hff530ee89e14fe85
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f8d01333f74 - std::panicking::default_hook::{{closure}}::h4e7fb0c7799d720c
   9:     0x7f8d01333bad - std::panicking::default_hook::ha8e4a4f93e8d13cc
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:288:9
  10:     0x7f8d03e58ec5 - <alloc[80fd20bfa47e5cbe]::boxed::Box<dyn for<'a, 'b> core[56d2be079082b2f7]::ops::function::Fn<(&'a core[56d2be079082b2f7]::panic::panic_info::PanicInfo<'b>,), Output = ()> + core[56d2be079082b2f7]::marker::Send + core[56d2be079082b2f7]::marker::Sync> as core[56d2be079082b2f7]::ops::function::Fn<(&core[56d2be079082b2f7]::panic::panic_info::PanicInfo,)>>::call
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1990:9
  11:     0x7f8d03e58ec5 - rustc_driver_impl[3922376c7e667c84]::DEFAULT_HOOK::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_driver_impl/src/lib.rs:1188:17
  12:     0x7f8d01334761 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h95f03351df89329f
                               at /home/matthias/vcs/github/rust_debug_assertions/library/alloc/src/boxed.rs:1990:9
  13:     0x7f8d01334761 - std::panicking::rust_panic_with_hook::hd91c43bc8d7e412b
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:694:13
  14:     0x7f8d013091f2 - std::panicking::begin_panic_handler::{{closure}}::h42d76a5ff060f351
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:579:13
  15:     0x7f8d01308cf6 - std::sys_common::backtrace::__rust_end_short_backtrace::h74d47eee5ac245dc
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/sys_common/backtrace.rs:150:18
  16:     0x7f8d01334282 - rust_begin_unwind
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:577:5
  17:     0x7f8d013e07a3 - core::panicking::panic_fmt::h3d0a8f81bb9ae67d
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:67:14
  18:     0x7f8d013e083d - core::panicking::panic::h8315a6df2d01c70b
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panicking.rs:117:5
  19:     0x7f8d0537c7bd - <rustc_mir_dataflow[70e04e8efc5f7d15]::framework::cursor::ResultsCursor<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces, &rustc_mir_dataflow[70e04e8efc5f7d15]::framework::engine::Results<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>>>::seek_to_block_entry
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/cursor.rs:98:9
  20:     0x7f8d052bcf7a - <rustc_mir_dataflow[70e04e8efc5f7d15]::framework::cursor::ResultsCursor<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces, &rustc_mir_dataflow[70e04e8efc5f7d15]::framework::engine::Results<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>>>::seek_to_block_start
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/cursor.rs:113:13
  21:     0x7f8d052bcf7a - <rustc_mir_dataflow[70e04e8efc5f7d15]::framework::graphviz::BlockFormatter<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>>::write_node_label::<alloc[80fd20bfa47e5cbe]::vec::Vec<u8>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/graphviz.rs:205:9
  22:     0x7f8d052bcf7a - <rustc_mir_dataflow[70e04e8efc5f7d15]::framework::graphviz::Formatter<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces> as rustc_graphviz[bbf68d9c0b89b5a]::Labeller>::node_label
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/graphviz.rs:89:9
  23:     0x7f8d0532b234 - rustc_graphviz[bbf68d9c0b89b5a]::render_opts::<rustc_middle[ddc0d9627cd9f41e]::mir::BasicBlock, rustc_mir_dataflow[70e04e8efc5f7d15]::framework::graphviz::CfgEdge, rustc_mir_dataflow[70e04e8efc5f7d15]::framework::graphviz::Formatter<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>, alloc[80fd20bfa47e5cbe]::vec::Vec<u8>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_graphviz/src/lib.rs:647:24
  24:     0x7f8d054ade46 - rustc_mir_dataflow[70e04e8efc5f7d15]::framework::engine::write_graphviz_results::<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/engine.rs:288:5
  25:     0x7f8d054ade46 - <rustc_mir_dataflow[70e04e8efc5f7d15]::framework::engine::Engine<rustc_mir_dataflow[70e04e8efc5f7d15]::impls::MaybeInitializedPlaces>>::iterate_to_fixpoint
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_dataflow/src/framework/engine.rs:225:19
  26:     0x7f8d0538435f - <rustc_mir_transform[80d90fe67a790186]::elaborate_drops::ElaborateDrops as rustc_middle[ddc0d9627cd9f41e]::mir::MirPass>::run_pass
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/elaborate_drops.rs:72:25
  27:     0x7f8d054c66b8 - rustc_mir_transform[80d90fe67a790186]::pass_manager::run_passes_inner
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/pass_manager.rs:124:13
  28:     0x7f8d0539aff3 - rustc_mir_transform[80d90fe67a790186]::pass_manager::run_passes_no_validate
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/pass_manager.rs:73:5
  29:     0x7f8d0539aff3 - rustc_mir_transform[80d90fe67a790186]::run_runtime_lowering_passes
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/lib.rs:522:5
  30:     0x7f8d0539aff3 - rustc_mir_transform[80d90fe67a790186]::run_analysis_to_runtime_passes
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/lib.rs:480:5
  31:     0x7f8d0539a768 - rustc_mir_transform[80d90fe67a790186]::mir_drops_elaborated_and_const_checked
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/lib.rs:452:5
  32:     0x7f8d059bdc02 - <rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked as rustc_query_system[dea804868d3de2b0]::query::config::QueryConfig<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:519:21
  33:     0x7f8d059bdc02 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:72
  34:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  35:     0x7f8d059bdc02 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::try_with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:252:16
  36:     0x7f8d059bdc02 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:228:9
  37:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:79:5
  38:     0x7f8d059bdc02 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:127:13
  39:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  40:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  41:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context_opt::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  42:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  43:     0x7f8d059bdc02 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  44:     0x7f8d059bdc02 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:112:9
  45:     0x7f8d059bdc02 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:18
  46:     0x7f8d059bdc02 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:401:17
  47:     0x7f8d059bdc02 - rustc_query_system[dea804868d3de2b0]::query::plumbing::try_execute_query::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:357:13
  48:     0x7f8d05bd927a - rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:800:36
  49:     0x7f8d05bd927a - stacker[7d0e6083c51d6934]::maybe_grow::<(&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  50:     0x7f8d05bd927a - rustc_data_structures[ff980df7d59f2440]::stack::ensure_sufficient_stack::<(&rustc_data_structures[ff980df7d59f2440]::steal::Steal<rustc_middle[ddc0d9627cd9f41e]::mir::Body>, core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  51:     0x7f8d05bd927a - rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query::<rustc_query_impl[33f66818407d1b0e]::queries::mir_drops_elaborated_and_const_checked, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:800:9
  52:     0x7f8d05bd927a - <rustc_query_impl[33f66818407d1b0e]::Queries as rustc_middle[ddc0d9627cd9f41e]::ty::query::QueryEngine>::mir_drops_elaborated_and_const_checked::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:805:17
  53:     0x7f8d05bd927a - <rustc_query_impl[33f66818407d1b0e]::Queries as rustc_middle[ddc0d9627cd9f41e]::ty::query::QueryEngine>::mir_drops_elaborated_and_const_checked
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/lib.rs:46:1
  54:     0x7f8d0539b95e - <rustc_middle[ddc0d9627cd9f41e]::ty::query::TyCtxtAt>::mir_drops_elaborated_and_const_checked
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/query.rs:400:29
  55:     0x7f8d0539b95e - <rustc_middle[ddc0d9627cd9f41e]::ty::context::TyCtxt>::mir_drops_elaborated_and_const_checked
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/query.rs:386:35
  56:     0x7f8d0539b95e - rustc_mir_transform[80d90fe67a790186]::inner_optimized_mir
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/lib.rs:623:13
  57:     0x7f8d0539b95e - rustc_mir_transform[80d90fe67a790186]::optimized_mir
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_mir_transform/src/lib.rs:601:21
  58:     0x7f8d05911652 - <rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir as rustc_query_system[dea804868d3de2b0]::query::config::QueryConfig<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:519:21
  59:     0x7f8d05911652 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:72
  60:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9
  61:     0x7f8d05911652 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::try_with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:252:16
  62:     0x7f8d05911652 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:228:9
  63:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:79:5
  64:     0x7f8d05911652 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:127:13
  65:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:133:9
  66:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:36
  67:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context_opt::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:100:18
  68:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:5
  69:     0x7f8d05911652 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, &rustc_middle[ddc0d9627cd9f41e]::mir::Body>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:124:5
  70:     0x7f8d05911652 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<&rustc_middle[ddc0d9627cd9f41e]::mir::Body, rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:112:9
  71:     0x7f8d05911652 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:18
  72:     0x7f8d05911652 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:401:17
  73:     0x7f8d05911652 - rustc_query_system[dea804868d3de2b0]::query::plumbing::try_execute_query::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:357:13
  74:     0x7f8d05bdd1f4 - rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:800:36
  75:     0x7f8d05bdd1f4 - stacker[7d0e6083c51d6934]::maybe_grow::<(&rustc_middle[ddc0d9627cd9f41e]::mir::Body, core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  76:     0x7f8d05bdd1f4 - rustc_data_structures[ff980df7d59f2440]::stack::ensure_sufficient_stack::<(&rustc_middle[ddc0d9627cd9f41e]::mir::Body, core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  77:     0x7f8d05bdd1f4 - rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query::<rustc_query_impl[33f66818407d1b0e]::queries::optimized_mir, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:800:9
  78:     0x7f8d05bdd1f4 - <rustc_query_impl[33f66818407d1b0e]::Queries as rustc_middle[ddc0d9627cd9f41e]::ty::query::QueryEngine>::optimized_mir::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:805:17
  79:     0x7f8d05bdd1f4 - <rustc_query_impl[33f66818407d1b0e]::Queries as rustc_middle[ddc0d9627cd9f41e]::ty::query::QueryEngine>::optimized_mir
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/lib.rs:46:1
  80:     0x7f8d04ff8826 - <rustc_middle[ddc0d9627cd9f41e]::ty::query::TyCtxtAt>::optimized_mir::<rustc_span[9569648757f2d60c]::def_id::DefId>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/query.rs:400:29
  81:     0x7f8d04ff8826 - <rustc_middle[ddc0d9627cd9f41e]::ty::context::TyCtxt>::optimized_mir::<rustc_span[9569648757f2d60c]::def_id::DefId>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/query.rs:386:35
  82:     0x7f8d04ff8826 - <rustc_middle[ddc0d9627cd9f41e]::ty::context::TyCtxt>::instance_mir
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/mod.rs:2376:30
  83:     0x7f8d0554820e - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_neighbours
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:1440:16
  84:     0x7f8d05544f48 - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_items_rec::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:492:17
  85:     0x7f8d05544f48 - stacker[7d0e6083c51d6934]::maybe_grow::<(), rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_items_rec::{closure#0}>
                               at /home/matthias/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
  86:     0x7f8d05544f48 - rustc_data_structures[ff980df7d59f2440]::stack::ensure_sufficient_stack::<(), rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_items_rec::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
  87:     0x7f8d05544f48 - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_items_rec
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:491:13
  88:     0x7f8d05551fff - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:350:17
  89:     0x7f8d05551fff - rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in::<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync.rs:181:66
  90:     0x7f8d05551fff - <core[56d2be079082b2f7]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#0}> as core[56d2be079082b2f7]::ops::function::FnOnce<()>>::call_once
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/panic/unwind_safe.rs:271:9
  91:     0x7f8d0556630f - std[2f6676e1b2585ce5]::panicking::try::do_call::<core[56d2be079082b2f7]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:485:40
  92:     0x7f8d0556630f - std[2f6676e1b2585ce5]::panicking::try::<(), core[56d2be079082b2f7]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#0}>>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panicking.rs:449:19
  93:     0x7f8d0556630f - std[2f6676e1b2585ce5]::panic::catch_unwind::<core[56d2be079082b2f7]::panic::unwind_safe::AssertUnwindSafe<rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}::{closure#0}>, ()>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/panic.rs:140:14
  94:     0x7f8d0556630f - rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in::<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync.rs:181:33
  95:     0x7f8d0556630f - core[56d2be079082b2f7]::iter::traits::iterator::Iterator::for_each::call::<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem, rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/iter/traits/iterator.rs:860:29
  96:     0x7f8d0556630f - <alloc[80fd20bfa47e5cbe]::vec::into_iter::IntoIter<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem> as core[56d2be079082b2f7]::iter::traits::iterator::Iterator>::fold::<(), core[56d2be079082b2f7]::iter::traits::iterator::Iterator::for_each::call<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem, rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/iter/traits/iterator.rs:2488:21
  97:     0x7f8d0556630f - <alloc[80fd20bfa47e5cbe]::vec::into_iter::IntoIter<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem> as core[56d2be079082b2f7]::iter::traits::iterator::Iterator>::for_each::<rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/core/src/iter/traits/iterator.rs:863:9
  98:     0x7f8d0556630f - rustc_data_structures[ff980df7d59f2440]::sync::par_for_each_in::<alloc[80fd20bfa47e5cbe]::vec::Vec<rustc_middle[ddc0d9627cd9f41e]::mir::mono::MonoItem>, rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/sync.rs:180:13
  99:     0x7f8d05590d55 - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:348:13
 100:     0x7f8d05590d55 - <rustc_data_structures[ff980df7d59f2440]::profiling::VerboseTimingGuard>::run::<(), rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/profiling.rs:752:9
 101:     0x7f8d05590d55 - <rustc_session[9cd5fd28d2fc2c89]::session::Session>::time::<(), rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items::{closure#1}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_session/src/utils.rs:11:50
 102:     0x7f8d05540d0a - rustc_monomorphize[8f9a4cbd94d33e44]::collector::collect_crate_mono_items
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/collector.rs:347:9
 103:     0x7f8d0558dcf8 - rustc_monomorphize[8f9a4cbd94d33e44]::partitioning::collect_and_partition_mono_items
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_monomorphize/src/partitioning/mod.rs:374:33
 104:     0x7f8d059b8069 - <rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items as rustc_query_system[dea804868d3de2b0]::query::config::QueryConfig<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>>::compute
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:519:21
 105:     0x7f8d059b8069 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:72
 106:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:82:9
 107:     0x7f8d059b8069 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::try_with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:252:16
 108:     0x7f8d059b8069 - <std[2f6676e1b2585ce5]::thread::local::LocalKey<core[56d2be079082b2f7]::cell::Cell<*const ()>>>::with::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/library/std/src/thread/local.rs:228:9
 109:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::enter_context::<rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:79:5
 110:     0x7f8d059b8069 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:127:13
 111:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:133:9
 112:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:36
 113:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context_opt::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:100:18
 114:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_context::<rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:111:5
 115:     0x7f8d059b8069 - rustc_middle[ddc0d9627cd9f41e]::ty::context::tls::with_related_context::<<rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>::{closure#0}, (&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit])>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_middle/src/ty/context/tls.rs:124:5
 116:     0x7f8d059b8069 - <rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt as rustc_query_system[dea804868d3de2b0]::query::QueryContext>::start_query::<(&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_impl/src/plumbing.rs:112:9
 117:     0x7f8d059b8069 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job_non_incr::<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:443:18
 118:     0x7f8d059b8069 - rustc_query_system[dea804868d3de2b0]::query::plumbing::execute_job::<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:401:17
 119:     0x7f8d059b8069 - rustc_query_system[dea804868d3de2b0]::query::plumbing::try_execute_query::<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:357:13
 120:     0x7f8d05c4fa41 - rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query::<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_query_system/src/query/plumbing.rs:800:36
 121:     0x7f8d05c4fa41 - stacker[7d0e6083c51d6934]::maybe_grow::<((&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/.cargo/registry/src/git.luolix.top-1ecc6299db9ec823/stacker-0.1.15/src/lib.rs:55:9
 122:     0x7f8d05c4fa41 - rustc_data_structures[ff980df7d59f2440]::stack::ensure_sufficient_stack::<((&rustc_data_structures[ff980df7d59f2440]::unord::UnordSet<rustc_span[9569648757f2d60c]::def_id::DefId>, &[rustc_middle[ddc0d9627cd9f41e]::mir::mono::CodegenUnit]), core[56d2be079082b2f7]::option::Option<rustc_query_system[dea804868d3de2b0]::dep_graph::graph::DepNodeIndex>), rustc_query_system[dea804868d3de2b0]::query::plumbing::get_query<rustc_query_impl[33f66818407d1b0e]::queries::collect_and_partition_mono_items, rustc_query_impl[33f66818407d1b0e]::plumbing::QueryCtxt>::{closure#0}>
                               at /home/matthias/vcs/github/rust_debug_assertions/compiler/rustc_data_structures/src/stack.rs:17:5
<snip>

error: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md

note: rustc 1.70.0-dev running on x86_64-unknown-linux-gnu

note: compiler flags: -Z dump-mir=all -Z dump-mir-dataflow

query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `main`
#1 [optimized_mir] optimizing MIR for `main`
#2 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
warning: 2 warnings emitted

@matthiaskrgr matthiaskrgr added I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. C-bug Category: This is a bug. requires-nightly This issue requires a nightly compiler in some way. requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way labels Apr 1, 2023
@clubby789
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It looks like this also reproduces when dropping something that contains something implementing Drop:

struct HasDrop;
impl Drop for HasDrop {
    fn drop(&mut self) {}
}
pub fn main() {
    let _ = (HasDrop,);
}

Removing the drop impl or making the value not a tuple doesn't ICE. I think that after drop elaboration, the unwind branch from dropping HasDrop is no longer reachable but still in the body

@clubby789 clubby789 mentioned this issue Apr 1, 2023
Merged
@bors bors closed this as completed in 4e0662c Apr 5, 2023
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C-bug Category: This is a bug. I-ICE Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️ requires-debug-assertions This issue requires a build of rustc or tooling with debug-assertions in some way requires-nightly This issue requires a nightly compiler in some way. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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Only create graphviz nodes for reachable MIR bb's clubby789/rust
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