ice: no enclosing scope found: feature-gate-const-if-match.rs

[matthiaskrgr]

Summary

code reduced from rustc ./src/test/ui/consts/control-flow/feature-gate-const-if-match.rs

fn main() {
    let _ = [0; {
        let x = 0;
        if let Some(x) = Some(x) { x } else { 1 }
    }];
}

found as part of #3142

Version

rustc 1.59.0-nightly (e012a191d 2022-01-06)
binary: rustc
commit-hash: e012a191d768adeda1ee36a99ef8b92d51920154
commit-date: 2022-01-06
host: x86_64-unknown-linux-gnu
release: 1.59.0-nightly
LLVM version: 13.0.0
clippy 0.1.59 (e012a19 2022-01-06)

Error output

clippy-driver ./src/test/ui/consts/control-flow/feature-gate-const-if-match.rs

Backtrace

error: internal compiler error: compiler/rustc_middle/src/middle/region.rs:371:32: no enclosing scope for id 7

thread 'rustc' panicked at 'Box<dyn Any>', compiler/rustc_errors/src/lib.rs:1169:9
stack backtrace:
 0:     0x7fcf9fa90b4c - std::backtrace_rs::backtrace::libunwind::trace::hac89ae696ab31153
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
 1:     0x7fcf9fa90b4c - std::backtrace_rs::backtrace::trace_unsynchronized::he0e34c1ffcd1fd95
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
 2:     0x7fcf9fa90b4c - std::sys_common::backtrace::_print_fmt::hbbcd6534ff2cdaab
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/sys_common/backtrace.rs:67:5
 3:     0x7fcf9fa90b4c - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::hca373cbf95c63dfd
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/sys_common/backtrace.rs:46:22
 4:     0x7fcf9faf168c - core::fmt::write::hf1bd4152e956a546
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/core/src/fmt/mod.rs:1168:17
 5:     0x7fcf9fa7fec3 - std::io::Write::write_fmt::h2f14a980b941fea5
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/io/mod.rs:1660:15
 6:     0x7fcf9fa95012 - std::sys_common::backtrace::_print::hc99e12058f69fd7f
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/sys_common/backtrace.rs:49:5
 7:     0x7fcf9fa95012 - std::sys_common::backtrace::print::h28ddbd216cc47c63
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/sys_common/backtrace.rs:36:9
 8:     0x7fcf9fa95012 - std::panicking::default_hook::{{closure}}::h91763e160bca83d2
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/panicking.rs:211:50
 9:     0x7fcf9fa94bf5 - std::panicking::default_hook::h04e711875c06f41e
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/panicking.rs:228:9
10:     0x56532ff1fa01 - clippy_driver[de939f5069ad0877]::ICE_HOOK::{closure#0}::{closure#0}
11:     0x7fcf9fa957c5 - std::panicking::rust_panic_with_hook::h7d6693789c82cfe4
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/panicking.rs:610:17
12:     0x7fcfa13b3cbb - std[e740e8867e95a171]::panicking::begin_panic::<rustc_errors[62a5cc7b06393f71]::ExplicitBug>::{closure#0}
13:     0x7fcfa13b34e6 - std[e740e8867e95a171]::sys_common::backtrace::__rust_end_short_backtrace::<std[e740e8867e95a171]::panicking::begin_panic<rustc_errors[62a5cc7b06393f71]::ExplicitBug>::{closure#0}, !>
14:     0x7fcfa13b3c5f - std[e740e8867e95a171]::panicking::begin_panic::<rustc_errors[62a5cc7b06393f71]::ExplicitBug>
15:     0x7fcfa13be9cd - std[e740e8867e95a171]::panic::panic_any::<rustc_errors[62a5cc7b06393f71]::ExplicitBug>
16:     0x7fcfa13bdc5d - <rustc_errors[62a5cc7b06393f71]::HandlerInner>::bug
17:     0x7fcfa13bd740 - <rustc_errors[62a5cc7b06393f71]::Handler>::bug
18:     0x7fcfa124a049 - rustc_middle[6a5313df6756a06b]::ty::context::tls::with_opt::<rustc_middle[6a5313df6756a06b]::util::bug::opt_span_bug_fmt<rustc_span[5840c952fc6dfb1f]::span_encoding::Span>::{closure#0}, ()>
19:     0x7fcfa124abd0 - rustc_middle[6a5313df6756a06b]::util::bug::opt_span_bug_fmt::<rustc_span[5840c952fc6dfb1f]::span_encoding::Span>
20:     0x7fcfa124ab46 - rustc_middle[6a5313df6756a06b]::util::bug::bug_fmt
21:     0x7fcfa2027764 - <rustc_middle[6a5313df6756a06b]::middle::region::ScopeTree>::var_scope
22:     0x5653301e88b8 - <clippy_lints[3e536fcc5bfc7607]::shadow::Shadow as rustc_lint[791f8e2cef40682b]::passes::LateLintPass>::check_pat
23:     0x7fcfa10702d4 - <rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects as rustc_lint[791f8e2cef40682b]::passes::LateLintPass>::check_pat
24:     0x7fcfa0374dba - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_pat
25:     0x7fcfa0311b5c - rustc_hir[b6231e5dfc545669]::intravisit::walk_pat::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
26:     0x7fcfa03126ee - rustc_hir[b6231e5dfc545669]::intravisit::walk_let_expr::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
27:     0x7fcfa0374e47 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_expr
28:     0x7fcfa031288b - rustc_hir[b6231e5dfc545669]::intravisit::walk_expr::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
29:     0x7fcfa0374e47 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_expr
30:     0x7fcfa03755c9 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_block
31:     0x7fcfa0374e47 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_expr
32:     0x7fcfa0374b7c - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_nested_body
33:     0x7fcfa0374e47 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_expr
34:     0x7fcfa0310c3b - rustc_hir[b6231e5dfc545669]::intravisit::walk_local::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
35:     0x7fcfa0375487 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_local
36:     0x7fcfa0374f12 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_stmt
37:     0x7fcfa0312577 - rustc_hir[b6231e5dfc545669]::intravisit::walk_block::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
38:     0x7fcfa03755c9 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_block
39:     0x7fcfa0374e47 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_expr
40:     0x7fcfa0374b7c - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_nested_body
41:     0x7fcfa037503a - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_fn
42:     0x7fcfa0310f92 - rustc_hir[b6231e5dfc545669]::intravisit::walk_item::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
43:     0x7fcfa0373ce9 - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_nested_item
44:     0x7fcfa0310bb7 - rustc_hir[b6231e5dfc545669]::intravisit::walk_mod::<rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>>
45:     0x7fcfa03753dc - <rustc_lint[791f8e2cef40682b]::late::LateContextAndPass<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects> as rustc_hir[b6231e5dfc545669]::intravisit::Visitor>::visit_mod
46:     0x7fcfa0375b04 - rustc_lint[791f8e2cef40682b]::late::late_lint_pass_crate::<rustc_lint[791f8e2cef40682b]::late::LateLintPassObjects>
47:     0x7fcfa14f06f7 - <rustc_session[c20293ac279aad06]::session::Session>::time::<(), rustc_lint[791f8e2cef40682b]::late::check_crate<rustc_lint[791f8e2cef40682b]::BuiltinCombinedLateLintPass, rustc_interface[947fac54d3fe2868]::passes::analysis::{closure#5}::{closure#0}::{closure#3}::{closure#0}::{closure#0}>::{closure#0}::{closure#0}>
48:     0x7fcfa2159ae6 - <core[24291291a921b533]::panic::unwind_safe::AssertUnwindSafe<rustc_interface[947fac54d3fe2868]::passes::analysis::{closure#5}::{closure#0}::{closure#3}> as core[24291291a921b533]::ops::function::FnOnce<()>>::call_once
49:     0x7fcfa215b53e - <core[24291291a921b533]::panic::unwind_safe::AssertUnwindSafe<rustc_interface[947fac54d3fe2868]::passes::analysis::{closure#5}::{closure#0}> as core[24291291a921b533]::ops::function::FnOnce<()>>::call_once
50:     0x7fcfa2157948 - <rustc_session[c20293ac279aad06]::session::Session>::time::<(), rustc_interface[947fac54d3fe2868]::passes::analysis::{closure#5}>
51:     0x7fcfa2131ffc - rustc_interface[947fac54d3fe2868]::passes::analysis
52:     0x7fcfa25d6c05 - rustc_query_system[1b2734a6ce8acad3]::query::plumbing::try_execute_query::<rustc_query_impl[e097f5d713df899a]::plumbing::QueryCtxt, rustc_query_system[1b2734a6ce8acad3]::query::caches::DefaultCache<(), core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>>
53:     0x7fcfa262fcf5 - rustc_query_system[1b2734a6ce8acad3]::query::plumbing::get_query::<rustc_query_impl[e097f5d713df899a]::queries::analysis, rustc_query_impl[e097f5d713df899a]::plumbing::QueryCtxt>
54:     0x7fcfa2112f30 - <rustc_interface[947fac54d3fe2868]::interface::Compiler>::enter::<rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}::{closure#2}, core[24291291a921b533]::result::Result<core[24291291a921b533]::option::Option<rustc_interface[947fac54d3fe2868]::queries::Linker>, rustc_errors[62a5cc7b06393f71]::ErrorReported>>
55:     0x7fcfa20f4c3c - rustc_span[5840c952fc6dfb1f]::with_source_map::<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_interface[947fac54d3fe2868]::interface::create_compiler_and_run<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}>::{closure#1}>
56:     0x7fcfa211230e - rustc_interface[947fac54d3fe2868]::interface::create_compiler_and_run::<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}>
57:     0x7fcfa20f619b - <scoped_tls[ec1705c99dfa8720]::ScopedKey<rustc_span[5840c952fc6dfb1f]::SessionGlobals>>::set::<rustc_interface[947fac54d3fe2868]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[947fac54d3fe2868]::interface::run_compiler<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}>::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>::{closure#0}::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>
58:     0x7fcfa20f5f95 - std[e740e8867e95a171]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[947fac54d3fe2868]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[947fac54d3fe2868]::interface::run_compiler<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}>::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>
59:     0x7fcfa21228a9 - <<std[e740e8867e95a171]::thread::Builder>::spawn_unchecked<rustc_interface[947fac54d3fe2868]::util::setup_callbacks_and_run_in_thread_pool_with_globals<rustc_interface[947fac54d3fe2868]::interface::run_compiler<core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>, rustc_driver[aab467f4c82ed6ad]::run_compiler::{closure#1}>::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>::{closure#0}, core[24291291a921b533]::result::Result<(), rustc_errors[62a5cc7b06393f71]::ErrorReported>>::{closure#1} as core[24291291a921b533]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
60:     0x7fcf9faa0cf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9a9713b5d2e24fc2
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/alloc/src/boxed.rs:1854:9
61:     0x7fcf9faa0cf3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9651309876a3c2bf
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/alloc/src/boxed.rs:1854:9
62:     0x7fcf9faa0cf3 - std::sys::unix::thread::Thread::new::thread_start::h8f346e0de1984669
                             at /rustc/e012a191d768adeda1ee36a99ef8b92d51920154/library/std/src/sys/unix/thread.rs:108:17
63:     0x7fcf9f993259 - start_thread
64:     0x7fcf9f7765e3 - __GI___clone
65:                0x0 - <unknown>

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

note: we would appreciate a bug report: https://github.com/rust-lang/rust-clippy/issues/new

note: Clippy version: clippy 0.1.59 (e012a19 2022-01-06)

query stack during panic:
#0 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to previous error

[matthiaskrgr]

Fixed by #8913