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ICE: `with_negative_coherence`: `None` in `compiler/rustc_infer/src/infer/canonical/canonicalizer.rs:483:43` #119381

Open matthiaskrgr opened 10 months ago

matthiaskrgr commented 10 months ago

even shorter repro:

#![feature(with_negative_coherence)]

struct GenericStruct<const MY_NUM: usize> {
    val: i64,
}

impl<const T: u128> From<GenericStruct<T>> for GenericStruct<{}> {}

auto-reduced (treereduce-rust):

#[derive(Copy)]
struct S<const N: [f32; N]>();

#[derive(Copy)]
struct S<const N: usize>([f32; N]);

#![feature(with_negative_coherence)]

original:

#![crate_type = "lib"]
#![feature(min_specialization)]

#[derive(Copy)]
struct S<const N: [f32; N]>([f32; f32N]);

#[derive(Copy)]
struct S<const N: usize>([f32; N]);

Version information

rustc 1.77.0-nightly (f4d794ea0 2023-12-28)
binary: rustc
commit-hash: f4d794ea0b845413344621d89f6c945062748485
commit-date: 2023-12-28
host: x86_64-unknown-linux-gnu
release: 1.77.0-nightly
LLVM version: 17.0.6

Command: /home/matthias/.rustup/toolchains/master/bin/rustc -Zcrate-attr=feature(with_negative_coherence)

Program output

``` error[E0428]: the name `S` is defined multiple times --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.Tcz7KehpgNJH/mvce.rs:5:1 | 2 | struct S(); | ------------------------------ previous definition of the type `S` here ... 5 | struct S([f32; N]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `S` redefined here | = note: `S` must be defined only once in the type namespace of this module error[E0770]: the type of const parameters must not depend on other generic parameters --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.Tcz7KehpgNJH/mvce.rs:2:25 | 2 | struct S(); | ^ the type must not depend on the parameter `N` | = note: const parameters may not be used in the type of const parameters error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.Tcz7KehpgNJH/mvce.rs:5:36 | 5 | struct S([f32; N]);compiler/rustc_infer/src/infer/canonical/canonicalizer.rs | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.dEdA4AEPEHqR/rustc_testrunner_tmpdir_reporting.Tcz7KehpgNJH/mvce.rs` thread 'rustc' panicked at compiler/rustc_infer/src/infer/canonical/canonicalizer.rs:483:43: called `Option::unwrap()` on a `None` value stack backtrace: 0: 0x7f0271780756 - std::backtrace_rs::backtrace::libunwind::trace::h3a8e5867b01d1b80 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5 1: 0x7f0271780756 - std::backtrace_rs::backtrace::trace_unsynchronized::he397ef0e45adff5d at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7f0271780756 - std::sys_common::backtrace::_print_fmt::h25cea7a1fa724fb5 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7f0271780756 - ::fmt::hda7577428151df9d at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:44:22 4: 0x7f02717d3080 - core::fmt::rt::Argument::fmt::hb2ec9e184bf02ba0 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/fmt/rt.rs:142:9 5: 0x7f02717d3080 - core::fmt::write::h3465386ebc0a8978 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/fmt/mod.rs:1120:17 6: 0x7f027177449f - std::io::Write::write_fmt::hd97c5a975dde240c at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/io/mod.rs:1810:15 7: 0x7f0271780534 - std::sys_common::backtrace::_print::h40f73d3c1d514bff at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:47:5 8: 0x7f0271780534 - std::sys_common::backtrace::print::h52313c48a0b47ef2 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:34:9 9: 0x7f02717832c7 - std::panicking::default_hook::{{closure}}::haa180c42e4a369b8 10: 0x7f0271783029 - std::panicking::default_hook::h2608c79ece8d0d38 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:292:9 11: 0x7f026e554c5c - std[3786b4fe60d6306f]::panicking::update_hook::>::{closure#0} 12: 0x7f0271783a16 - as core::ops::function::Fn>::call::hb87a29f68be8c251 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2029:9 13: 0x7f0271783a16 - std::panicking::rust_panic_with_hook::h184b82fc904f3d9c at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:783:13 14: 0x7f0271783729 - std::panicking::begin_panic_handler::{{closure}}::h67db85fa17afc73b at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:649:13 15: 0x7f0271780c56 - std::sys_common::backtrace::__rust_end_short_backtrace::h8eaebecb966c644a at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys_common/backtrace.rs:171:18 16: 0x7f02717834c0 - rust_begin_unwind at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/panicking.rs:645:5 17: 0x7f02717cf785 - core::panicking::panic_fmt::hd644558ff883b3e1 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/panicking.rs:72:14 18: 0x7f02717cf843 - core::panicking::panic::h2d0706ee0b925e5e at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/core/src/panicking.rs:144:5 19: 0x7f026fb8443a - >::fold_const 20: 0x7f026e7cd0e1 - >::try_fold_with:: 21: 0x7f026e7ef894 - <::canonicalize_query_with_mode<(rustc_middle[f757abec48a5eb78]::ty::Ty, rustc_middle[f757abec48a5eb78]::ty::Ty)>::{closure#0} as core[d43ed1021aff63f4]::ops::function::FnOnce<(rustc_middle[f757abec48a5eb78]::ty::context::TyCtxt, rustc_middle[f757abec48a5eb78]::ty::ParamEnv, &mut rustc_middle[f757abec48a5eb78]::infer::canonical::OriginalQueryValues)>>::call_once 22: 0x7f026f94ab03 - ::get_or_insert 23: 0x7f026e7f9ab8 - ::canonicalize_query_with_mode::<(rustc_middle[f757abec48a5eb78]::ty::Ty, rustc_middle[f757abec48a5eb78]::ty::Ty)> 24: 0x7f026f8a989a - ::super_combine_tys:: 25: 0x7f026f89c2e6 - ::tys 26: 0x7f026fe743a2 - ::eq:: 27: 0x7f026fe73edf - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::equate_impl_headers 28: 0x7f026f051c90 - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::impl_intersection_has_negative_obligation 29: 0x7f026fe75ff5 - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::overlap 30: 0x7f027022605e - ::insert 31: 0x7f0270225625 - ::insert 32: 0x7f02702291cc - rustc_trait_selection[a1ce0c536377f08f]::traits::specialize::specialization_graph_provider 33: 0x7f0270228bec - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::> 34: 0x7f026f85e914 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 35: 0x7f026fca03de - rustc_query_impl[6f15f6c85c1a873b]::query_impl::specialization_graph_of::get_query_non_incr::__rust_end_short_backtrace 36: 0x7f026f9864cf - rustc_hir_analysis[9c2d6d0d7a0bf722]::coherence::coherent_trait 37: 0x7f026f9863b1 - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::> 38: 0x7f027016171f - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 39: 0x7f027016148f - rustc_query_impl[6f15f6c85c1a873b]::query_impl::coherent_trait::get_query_non_incr::__rust_end_short_backtrace 40: 0x7f026fe49bad - rustc_hir_analysis[9c2d6d0d7a0bf722]::check_crate 41: 0x7f02700f3369 - rustc_interface[6675b02aac4159d5]::passes::analysis 42: 0x7f02700f2f9d - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::> 43: 0x7f02707ac764 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 44: 0x7f02707ac555 - rustc_query_impl[6f15f6c85c1a873b]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace 45: 0x7f0270837992 - rustc_interface[6675b02aac4159d5]::interface::run_compiler::, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0} 46: 0x7f02707bb486 - std[3786b4fe60d6306f]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>> 47: 0x7f02707bb2b3 - <::spawn_unchecked_, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#1} as core[d43ed1021aff63f4]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0} 48: 0x7f027178d945 - as core::ops::function::FnOnce>::call_once::h060b15507a6e395e at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 49: 0x7f027178d945 - as core::ops::function::FnOnce>::call_once::h6e5319cc8a1e4225 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 50: 0x7f027178d945 - std::sys::unix::thread::Thread::new::thread_start::h8fbbd825c116e901 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys/unix/thread.rs:108:17 51: 0x7f026b6749eb - 52: 0x7f026b6f87cc - 53: 0x0 - 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 1.77.0-nightly (f4d794ea0 2023-12-28) running on x86_64-unknown-linux-gnu note: compiler flags: -Z crate-attr=feature(with_negative_coherence) -Z dump-mir-dir=dir query stack during panic: #0 [specialization_graph_of] building specialization graph of trait `core::marker::Copy` #1 [coherent_trait] coherence checking all impls of trait `core::marker::Copy` #2 [analysis] running analysis passes on this crate end of query stack error: aborting due to 3 previous errors Some errors have detailed explanations: E0428, E0601, E0770. For more information about an error, try `rustc --explain E0428`. ```

compiler-errors commented 10 months ago

3b55869615d320f7d505e0fd9326be14830c6c52 cc @aliemjay

Apetree100122 commented 10 months ago

19: 0x7f026fb8443a - <rustc_infer[c0adb274575b21bc]::infer::canonical::canonicalizer::Canonicalizer as rustc_type_ir[c1725dac3fe0073f]::fold::TypeFolder<rustc_middle[f757abec48a5eb78]::ty::context::TyCtxt>>::fold_const 20: 0x7f026e7cd0e1 - <rustc_middle[f757abec48a5eb78]::ty::Clause as rustc_type_ir[c1725dac3fe0073f]::fold::TypeFoldable<rustc_middle[f757abec48a5eb78]::ty::context::TyCtxt>>::try_fold_with::<rustc_infer[c0adb274575b21bc]::infer::canonical::canonicalizer::Canonicalizer> 21: 0x7f026e7ef894 - <<rustc_infer[c0adb274575b21bc]::infer::InferCtxt>::canonicalize_query_with_mode<(rustc_middle[f757abec48a5eb78]::ty::Ty, rustc_middle[f757abec48a5eb78]::ty::Ty)>::{closure#0} as core[d43ed1021aff63f4]::ops::function::FnOnce<(rustc_middle[f757abec48a5eb78]::ty::context::TyCtxt, rustc_middle[f757abec48a5eb78]::ty::ParamEnv, &mut rustc_middle[f757abec48a5eb78]::infer::canonical::OriginalQueryValues)>>::call_once 22: 0x7f026f94ab03 - <rustc_middle[f757abec48a5eb78]::infer::canonical::CanonicalParamEnvCache>::get_or_insert 23: 0x7f026e7f9ab8 - <rustc_infer[c0adb274575b21bc]::infer::InferCtxt>::canonicalize_query_with_mode::<(rustc_middle[f757abec48a5eb78]::ty::Ty, rustc_middle[f757abec48a5eb78]::ty::Ty)> 24: 0x7f026f8a989a - <rustc_infer[c0adb274575b21bc]::infer::InferCtxt>::super_combine_tys::<rustc_infer[c0adb274575b21bc]::infer::relate::equate::Equate> 25: 0x7f026f89c2e6 - <rustc_infer[c0adb274575b21bc]::infer::relate::equate::Equate as rustc_middle[f757abec48a5eb78]::ty::relate::TypeRelation>::tys 26: 0x7f026fe743a2 - <rustc_infer[c0adb274575b21bc]::infer::at::At>::eq::<rustc_middle[f757abec48a5eb78]::ty::sty::TraitRef> 27: 0x7f026fe73edf - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::equate_impl_headers 28: 0x7f026f051c90 - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::impl_intersection_has_negative_obligation 29: 0x7f026fe75ff5 - rustc_trait_selection[a1ce0c536377f08f]::traits::coherence::overlap 30: 0x7f027022605e - <rustc_middle[f757abec48a5eb78]::traits::specialization_graph::Children as rustc_trait_selection[a1ce0c536377f08f]::traits::specialize::specialization_graph::ChildrenExt>::insert 31: 0x7f0270225625 - <rustc_middle[f757abec48a5eb78]::traits::specialization_graph::Graph as rustc_trait_selection[a1ce0c536377f08f]::traits::specialize::specialization_graph::GraphExt>::insert 32: 0x7f02702291cc - rustc_trait_selection[a1ce0c536377f08f]::traits::specialize::specialization_graph_provider 33: 0x7f0270228bec - rustc_query_impl[6f15f6c85c1a873b]::plumbing::rust_begin_short_backtrace::<rustc_query_impl[6f15f6c85c1a873b]::query_impl::specialization_graph_of::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 8usize]>> 34: 0x7f026f85e914 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::<rustc_query_impl[6f15f6c85c1a873b]::DynamicConfig<rustc_query_system[7fd09d8d21d1b510]::query::caches::DefaultCache<rustc_span[65f71dc0888967d4]::def_id::DefId, rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 35: 0x7f026fca03de - rustc_query_impl[6f15f6c85c1a873b]::query_impl::specialization_graph_of::get_query_non_incr::rust_end_short_backtrace 36: 0x7f026f9864cf - rustc_hir_analysis[9c2d6d0d7a0bf722]::coherence::coherent_trait 37: 0x7f026f9863b1 - rustc_query_impl[6f15f6c85c1a873b]::plumbing::rust_begin_short_backtrace::<rustc_query_impl[6f15f6c85c1a873b]::query_impl::coherent_trait::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 0usize]>> 38: 0x7f027016171f - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::<rustc_query_impl[6f15f6c85c1a873b]::DynamicConfig<rustc_query_system[7fd09d8d21d1b510]::query::caches::DefaultCache<rustc_span[65f71dc0888967d4]::def_id::DefId, rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 39: 0x7f027016148f - rustc_query_impl[6f15f6c85c1a873b]::query_impl::coherent_trait::get_query_non_incr::rust_end_short_backtrace 40: 0x7f026fe49bad - rustc_hir_analysis[9c2d6d0d7a0bf722]::check_crate 41: 0x7f02700f3369 - rustc_interface6675b02aac4159d5::passes::analysis 42: 0x7f02700f2f9d - rustc_query_impl[6f15f6c85c1a873b]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[6f15f6c85c1a873b]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 1usize]>> 43: 0x7f02707ac764 - rustc_query_system[7fd09d8d21d1b510]::query::plumbing::try_execute_query::<rustc_query_impl[6f15f6c85c1a873b]::DynamicConfig<rustc_query_system[7fd09d8d21d1b510]::query::caches::SingleCache<rustc_middle[f757abec48a5eb78]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[6f15f6c85c1a873b]::plumbing::QueryCtxt, false> 44: 0x7f02707ac555 - rustc_query_impl[6f15f6c85c1a873b]::query_impl::analysis::get_query_non_incr::rust_end_short_backtrace 45: 0x7f0270837992 - rustc_interface6675b02aac4159d5::interface::run_compiler::<core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0} 46: 0x7f02707bb486 - std[3786b4fe60d6306f]::sys_common::backtrace::rust_begin_short_backtrace::<rustc_interface6675b02aac4159d5::util::run_in_thread_with_globals<rustc_interface6675b02aac4159d5::util::run_in_thread_pool_with_globals<rustc_interface6675b02aac4159d5::interface::run_compiler<core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>, rustc_driver_impl[5c34c1e050da57aa]::run_compiler::{closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>: :{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<(), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>> 47: 0x7f02707bb2b3 - <<std[3786b4fe60d6306f]::thread::Builder>::spawnunchecked<rustc_interface

d43ed1021aff63f4]::result::Result<( ), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>, rustc_driver_impl[5c34c1e050da57aa]::run_compiler:: {closure#0}>::{closure#0}, core[d43ed1021aff63f4]::result::Result<( ), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>:: {closure#0}, core[ d43ed1021aff63f4]::result::Result<( ), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>: :{closure#0}::{closure#0}, core[d43ed1021aff63f4]::result::Result<( ), rustc_span[65f71dc0888967d4]::ErrorGuaranteed>>::{ closure#1} as core[d43ed1021aff63f4]::ops::function::FnOnce<( )>>::call_once::{shim:vtable#0 48: 0x7f027178d945 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce>::call_once::h060b15507a6e395e at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 49: 0x7f027178d945 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce>::call_once::h6e5319cc8a1e4225 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/alloc/src/boxed.rs:2015:9 50: 0x7f027178d945 - std::sys::unix::thread::Thread::new::thread_start::h8fbbd825c116e901 at /rustc/f4d794ea0b845413344621d89f6c945062748485/library/std/src/sys/unix/thread.rs:108:17 51: 0x7f026b6749eb - 52: 0x7f026b6f87cc - 53: 0x0 - 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 1.77.0-nightly (f4d794ea0 2023-12-28) running on x86_64-unknown-linux-gnu note: compiler flags: -Z crate-attr=feature(with_negative_coherence) -Z dump-mir-dir=dir query stack during panic:

0 [specialization_graph_of] building specialization graph of trait core::marker::Copy

1 [coherent_trait] coherence checking all impls of trait core::marker::Copy

2 [analysis] running analysis passes on this crate

end of query stack error: aborting due to 3 previous errors Some errors have detailed explanations: E0428, E0601, E0770. For more information about an error, try rustc --explain E0428.

Apetree100122 commented 10 months ago

error[E0428]: the name S is defined multiple time s>/tmp/icemaker_global_tempdir.dEdA4AEPEHqR/ru stc_te strunner_tmpdir_reporting.Tcz7KehpgNJH/mvce.r s:5:1 |2 | struct S<const N: [f32; N]>(); | ------------------------------ previou s definition of the type S here... 5 | struct S<const N: u size>([f32; N]); | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ S redefined here| = note: S mu st be defined only once in the type name space of this module error[E0770]: the type of con st parameter s must not depend on other generic parameter s -->/tmp/icemaker_global_tempdir.dEdA4AEPEHqR/ru stc_te strunner_tmpdir_reporting.Tc z7KehpgNJH/mvce.r s:2:2 5 |2 | struct S<const N: [f32; N]>( ); | ^ the type must not depend on the parameter N| = note: con st parameter s may not be u sed in the type of con st parameter s error[E0601]: main function not found in crate mvce --> /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/ru stc_testrunner_tmpdir_reporting.Tc z7KehpgNJH/mvce.r s: 5:36| 5 | struct S<const N: u size>([f32; N]);compiler/ru stc_infer/ src/infer/canonical/canonicalizer.r s | ^ con sider adding a main function to /tmp/icemaker_global_tempdir.dEdA4AEPEHqR/ru stc_te strunner_tmpdir_reporting.Tc z7KehpgNJH/mvce.r s thread 'ru stc' panicked at compiler/ru stc_infer/ src/infer/canonical/canonicali zer.r s:483:43: called Option::unwrap() on a None value stack backtrace: 0: 0x7f0271780756 - std::backtrace_r s::backtrace::libunwind::trace::h3a8e 5867b01d1b80 at /rus tc/f4d794ea0b845413344621d89f6c94 506274848 5/library /std/ src/backtrace/ src/backtrace/libunwind.r s:104 :5 1: 0x7f0271780756 - std::backtrace_r s::backtrace::trace_un synchroni zed::he397ef0e4 5adff5d at /ru stc/f4d794ea0b84 5413344621d89f6c94 506274848 5/library/ std/ src/backtrace/ src/backtrace/mod.r s:66: 5 2: 0x7f02717807 56 - std:: sys_common::backtrace::_print_fmt::h2 5cea7a1fa724fb 5 at /ru stc/f4d794ea0b84l 5413344621d89f6c94506274848 5/library/ std/ src/ sys_common/backtrace.rs:68: 5 3: 0x7f0271780756

aliemjay commented 10 months ago

This seems to be triggered only by invalid code with an unstable feature gate.

MCVE:

#![feature(with_negative_coherence)]
trait Trait {}
impl<const N: u8> Trait for [(); N] {}
impl<const N: i8> Trait for [(); N] {}