Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

adt_const_params: ICE when using reference to user-defined unsized type as const generic #119299

Closed
fcard opened this issue Dec 25, 2023 · 4 comments
Closed

adt_const_params: ICE when using reference to user-defined unsized type as const generic #119299

fcard opened this issue Dec 25, 2023 · 4 comments
Labels
C-bug Category: This is a bug. 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.

Comments

@fcard
Copy link

fcard commented Dec 25, 2023

Code

#![feature(adt_const_params)]
#![allow(incomplete_features)]

use std::marker::ConstParamTy;

#[derive(Eq, PartialEq)]
struct ConstStrU(*const u8, usize);

impl ConstParamTy for &'static ConstStrU {}

impl ConstStrU {
  const fn from_bytes(bytes: &'static [u8]) -> Self {
    Self(bytes.as_ptr(), bytes.len())
  }
}

const fn chars_s<const S: &'static ConstStrU>() -> [char; 3] {
  ['a','b','c']
}

fn main() {
  const A: &'static ConstStrU = &ConstStrU::from_bytes(b"abc");
  chars_s::<A>();
}

Removing the pointer from ConstStrU unbreaks the code.

Meta

rustc --version --verbose:

rustc 1.77.0-nightly (3d0e6bed6 2023-12-21)
binary: rustc
commit-hash: 3d0e6bed600c0175628e96f1118293cf44fb97bd
commit-date: 2023-12-21
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Error output

error: internal compiler error: no errors encountered even though `span_delayed_bug` issued

error: internal compiler error: `ty::Const::eval` called on a non-valtree-compatible type
  |
  = note: delayed at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/compiler/rustc_middle/src/ty/consts.rs:325:38
             0: <rustc_errors::DiagCtxtInner>::emit_diagnostic_without_consuming
             1: <rustc_errors::DiagCtxtInner>::emit_diagnostic
             2: <rustc_errors::DiagCtxt>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
             3: <rustc_middle::ty::consts::Const>::eval.cold.0
             4: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_type_ir::fold::TypeFolder<rustc_middle::ty::context::TyCtxt>>::fold_const
             5: <&rustc_middle::ty::list::List<rustc_middle::ty::generic_args::GenericArg> as rustc_type_ir::fold::TypeFoldable<rustc_middle::ty::context::TyCtxt>>::try_fold_with::<rustc_trait_selection::traits::project::AssocTypeNormalizer>
             6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::normalize::<&rustc_middle::ty::list::List<rustc_middle::ty::generic_args::GenericArg>>
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::instantiate_value_path
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_path
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
            10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
            12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            13: rustc_hir_typeck::check::check_fn
            14: rustc_hir_typeck::typeck
            15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
            16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
            17: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
            18: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_hir_analysis::check_crate::{closure#7}>::{closure#0}
            19: rustc_hir_analysis::check_crate
            20: rustc_interface::passes::analysis
            21: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
            22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
            23: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
            24: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
            25: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            26: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
            28: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
            29: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/std/src/sys/unix/thread.rs:108:17
            30: start_thread
                       at ./nptl/pthread_create.c:444:8
            31: __GI___clone3
                       at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
          

error: internal compiler error: `ty::Const::eval` called on a non-valtree-compatible type
  |
  = note: delayed at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/compiler/rustc_middle/src/ty/consts.rs:325:38
             0: <rustc_errors::DiagCtxtInner>::emit_diagnostic_without_consuming
             1: <rustc_errors::DiagCtxtInner>::emit_diagnostic
             2: <rustc_errors::DiagCtxt>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
             3: <rustc_middle::ty::consts::Const>::eval.cold.0
             4: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_type_ir::fold::TypeFolder<rustc_middle::ty::context::TyCtxt>>::fold_const
             5: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
             6: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
             7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
             8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
             9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
            11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
            12: rustc_hir_typeck::check::check_fn
            13: rustc_hir_typeck::typeck
            14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
            15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
            16: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
            17: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_hir_analysis::check_crate::{closure#7}>::{closure#0}
            18: rustc_hir_analysis::check_crate
            19: rustc_interface::passes::analysis
            20: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
            21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
            22: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
            23: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
            24: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
            25: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
            26: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
            27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
            28: std::sys::unix::thread::Thread::new::thread_start
                       at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/std/src/sys/unix/thread.rs:108:17
            29: start_thread
                       at ./nptl/pthread_create.c:444:8
            30: __GI___clone3
                       at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78
Backtrace 

delayed span bug: `ty::Const::eval` called on a non-valtree-compatible type
   0: <rustc_errors::DiagCtxtInner>::emit_diagnostic_without_consuming
   1: <rustc_errors::DiagCtxtInner>::emit_diagnostic
   2: <rustc_errors::DiagCtxt>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
   3: <rustc_middle::ty::consts::Const>::eval.cold.0
   4: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_type_ir::fold::TypeFolder<rustc_middle::ty::context::TyCtxt>>::fold_const
   5: <&rustc_middle::ty::list::List<rustc_middle::ty::generic_args::GenericArg> as rustc_type_ir::fold::TypeFoldable<rustc_middle::ty::context::TyCtxt>>::try_fold_with::<rustc_trait_selection::traits::project::AssocTypeNormalizer>
   6: <rustc_hir_typeck::fn_ctxt::FnCtxt>::normalize::<&rustc_middle::ty::list::List<rustc_middle::ty::generic_args::GenericArg>>
   7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::instantiate_value_path
   8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_path
   9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
  10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
  12: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  13: rustc_hir_typeck::check::check_fn
  14: rustc_hir_typeck::typeck
  15: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  16: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  17: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  18: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_hir_analysis::check_crate::{closure#7}>::{closure#0}
  19: rustc_hir_analysis::check_crate
  20: rustc_interface::passes::analysis
  21: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
  22: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  23: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  24: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
  25: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
  26: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
  28: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
  29: std::sys::unix::thread::Thread::new::thread_start
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/std/src/sys/unix/thread.rs:108:17
  30: start_thread
             at ./nptl/pthread_create.c:444:8
  31: __GI___clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78

delayed span bug: `ty::Const::eval` called on a non-valtree-compatible type
   0: <rustc_errors::DiagCtxtInner>::emit_diagnostic_without_consuming
   1: <rustc_errors::DiagCtxtInner>::emit_diagnostic
   2: <rustc_errors::DiagCtxt>::span_delayed_bug::<rustc_span::span_encoding::Span, &str>
   3: <rustc_middle::ty::consts::Const>::eval.cold.0
   4: <rustc_trait_selection::traits::project::AssocTypeNormalizer as rustc_type_ir::fold::TypeFolder<rustc_middle::ty::context::TyCtxt>>::fold_const
   5: <rustc_trait_selection::traits::fulfill::FulfillProcessor as rustc_data_structures::obligation_forest::ObligationProcessor>::process_obligation
   6: <rustc_data_structures::obligation_forest::ObligationForest<rustc_trait_selection::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection::traits::fulfill::FulfillProcessor>
   7: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_argument_types
   8: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_call
   9: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  10: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_block_with_expected
  11: <rustc_hir_typeck::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  12: rustc_hir_typeck::check::check_fn
  13: rustc_hir_typeck::typeck
  14: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 8]>>
  15: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::VecCache<rustc_span::def_id::LocalDefId, rustc_middle::query::erase::Erased<[u8; 8]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  16: rustc_query_impl::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  17: <rustc_middle::hir::map::Map>::par_body_owners::<rustc_hir_analysis::check_crate::{closure#7}>::{closure#0}
  18: rustc_hir_analysis::check_crate
  19: rustc_interface::passes::analysis
  20: rustc_query_impl::plumbing::__rust_begin_short_backtrace::<rustc_query_impl::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle::query::erase::Erased<[u8; 1]>>
  21: rustc_query_system::query::plumbing::try_execute_query::<rustc_query_impl::DynamicConfig<rustc_query_system::query::caches::SingleCache<rustc_middle::query::erase::Erased<[u8; 1]>>, false, false, false>, rustc_query_impl::plumbing::QueryCtxt, false>
  22: rustc_query_impl::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  23: rustc_interface::interface::run_compiler::<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}
  24: std::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>
  25: <<std::thread::Builder>::spawn_unchecked_<rustc_interface::util::run_in_thread_with_globals<rustc_interface::util::run_in_thread_pool_with_globals<rustc_interface::interface::run_compiler<core::result::Result<(), rustc_span::ErrorGuaranteed>, rustc_driver_impl::run_compiler::{closure#0}>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#0}::{closure#0}, core::result::Result<(), rustc_span::ErrorGuaranteed>>::{closure#1} as core::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  26: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
  27: <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/alloc/src/boxed.rs:2015:9
  28: std::sys::unix::thread::Thread::new::thread_start
             at /rustc/3d0e6bed600c0175628e96f1118293cf44fb97bd/library/std/src/sys/unix/thread.rs:108:17
  29: start_thread
             at ./nptl/pthread_create.c:444:8
  30: __GI___clone3
             at ./misc/../sysdeps/unix/sysv/linux/x86_64/clone3.S:78



rustc version: 1.77.0-nightly (3d0e6bed6 2023-12-21)
platform: x86_64-unknown-linux-gnu

query stack during panic:
end of query stack

@fcard fcard added C-bug Category: This is a bug. 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. labels Dec 25, 2023
@rustbot rustbot added the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Dec 25, 2023
@sjwang05
Copy link
Contributor

Regression in nightly-2023-06-03

found 9 bors merge commits in the specified range
commit[0] 2023-06-01: Auto merge of #111660 - Kobzol:try-build-skip-docs, r=mark-simulacrum
commit[1] 2023-06-01: Auto merge of #112184 - matthiaskrgr:rollup-tlh72el, r=matthiaskrgr
commit[2] 2023-06-02: Auto merge of #111553 - cjgillot:mir-e2e, r=scottmcm
commit[3] 2023-06-02: Auto merge of #111677 - fee1-dead-contrib:rustc_const_eval-translatable, r=oli-obk,RalfJung
commit[4] 2023-06-02: Auto merge of #112198 - compiler-errors:rollup-o2xe4of, r=compiler-errors
commit[5] 2023-06-02: Auto merge of #112203 - flip1995:clippyup, r=Manishearth
commit[6] 2023-06-02: Auto merge of #112152 - jyn514:doc-msg, r=clubby789
commit[7] 2023-06-02: Auto merge of #112212 - matthiaskrgr:rollup-e5ilgf0, r=matthiaskrgr
commit[8] 2023-06-02: Auto merge of #112162 - nnethercote:clarify-mono-item-usage, r=wesleywiser
ERROR: no CI builds available between d59363a and dd5d7c7 within last 167 days

@Luk-ESC
Copy link
Contributor

Luk-ESC commented Dec 29, 2023 •
edited
Loading

Minimized:

#![feature(adt_const_params)]
#![allow(incomplete_features)]

use std::marker::ConstParamTy;

#[derive(Eq, PartialEq)]
struct Wrapper(*const ());

impl ConstParamTy for &'static Wrapper {}

fn take_const<const W: &'static Wrapper>() {}

fn main() {
  const W: &Wrapper = &Wrapper(&());
  
  take_const::<W>();
}

You can't impl ConstParamTy for Wrapper because *const _ is not ConstParamTy, but you can impl<'a> ConstParamTy for &'a Wrapper, which should not be allowed

@matthiaskrgr matthiaskrgr mentioned this issue Jan 9, 2024
Open
@RalfJung
Copy link
Member

Indeed, what should happen here is that the code errors because you can't impl ConstParamTy for a type that contains a raw pointer.

Cc @lcnr

@RalfJung
Copy link
Member

Ah, in fact this is a duplicate of #112124.

@fmease fmease closed this as not planned Won't fix, can't repro, duplicate, stale Jan 16, 2024
@fmease fmease removed the needs-triage This issue may need triage. Remove it if it has been sufficiently triaged. label Jan 16, 2024
@sjwang05 sjwang05 mentioned this issue Jan 19, 2024
Closed
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Assignees
No one assigned
Labels
C-bug Category: This is a bug. 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.
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
6 participants
@RalfJung @fcard @fmease @rustbot @Luk-ESC @sjwang05