Closed
Description
Hi all,
I ran into the following error as shown in the example below. The error also happened with version 1.61 stable.
If the cast is on the same line it seems to panic.
Code
#[repr(u16)]
#[derive(Debug, PartialEq)]
pub enum Register<const N: u16> {
Field0 = 40,
Field1,
Field2,
}
#[cfg(test)]
mod test {
use crate::Register;
#[test]
fn test_ok1() {
let a = Register::<0>::Field1;
assert_eq!(a as u16, 41);
}
#[test]
fn test_ok2() {
let a = Register::<0>::Field1;
let b = a as u16;
assert_eq!(b as u16, 41);
}
#[test]
fn test_crash() {
let b = Register::<0>::Field1 as u16;
assert_eq!(b, 41);
}
}Meta
rustc --version --verbose:
rustc 1.63.0-nightly (e09449220 2022-05-31)
binary: rustc
commit-hash: e0944922007e1bb4fe59809293acf4364410cccc
commit-date: 2022-05-31
host: x86_64-unknown-linux-gnu
release: 1.63.0-nightly
LLVM version: 14.0.4
Error output
➜ cargo test
Compiling bug_test v0.1.0 (/home/mariuss/Documents/projects/bug_test)
error: internal compiler error: compiler/rustc_middle/src/ty/subst.rs:646:17: const parameter `N/#0` (Const { ty: u16, val: Param(N/#0) }/0) out of range when substituting substs=[]
thread 'rustc' panicked at 'Box<dyn Any>', /rustc/e0944922007e1bb4fe59809293acf4364410cccc/compiler/rustc_errors/src/lib.rs:1275:9
stack backtrace:
...
note: 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 1.63.0-nightly (e09449220 2022-05-31) running on x86_64-unknown-linux-gnu
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [mir_drops_elaborated_and_const_checked] elaborating drops for `test::test_register_overlap`
#1 [optimized_mir] optimizing MIR for `test::test_register_overlap`
#2 [collect_and_partition_mono_items] collect_and_partition_mono_items
end of query stack
error: could not compile `bug_test`
Backtrace
0: 0x7f2da697afcd - std::backtrace_rs::backtrace::libunwind::trace::h5e7b7b93d1f3acd5
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
1: 0x7f2da697afcd - std::backtrace_rs::backtrace::trace_unsynchronized::h0b55e59d6533cb7a
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7f2da697afcd - std::sys_common::backtrace::_print_fmt::h8d9df3b204a71ddc
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/sys_common/backtrace.rs:66:5
3: 0x7f2da697afcd - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h166638903f004cd7
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/sys_common/backtrace.rs:45:22
4: 0x7f2da69d6cac - core::fmt::write::h4a54f58ff9354b6b
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/core/src/fmt/mod.rs:1196:17
5: 0x7f2da696c6c1 - std::io::Write::write_fmt::h285cd63945fc257a
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/io/mod.rs:1654:15
6: 0x7f2da697dcb5 - std::sys_common::backtrace::_print::h2c317b930e1ae70b
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/sys_common/backtrace.rs:48:5
7: 0x7f2da697dcb5 - std::sys_common::backtrace::print::h27906e0460eccc74
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/sys_common/backtrace.rs:35:9
8: 0x7f2da697dcb5 - std::panicking::default_hook::{{closure}}::h0440e717959fdde2
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/panicking.rs:295:22
9: 0x7f2da697d9d6 - std::panicking::default_hook::h9b8b53679edadd5f
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/panicking.rs:314:9
10: 0x7f2da7153411 - rustc_driver[353b86defc14ca1]::DEFAULT_HOOK::{closure#0}::{closure#0}
11: 0x7f2da697e38a - std::panicking::rust_panic_with_hook::h2fd904b55fab5e80
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/panicking.rs:702:17
12: 0x7f2da822fbc1 - std[7074de9448f53455]::panicking::begin_panic::<rustc_errors[bd68527f243ec694]::ExplicitBug>::{closure#0}
13: 0x7f2da822f566 - std[7074de9448f53455]::sys_common::backtrace::__rust_end_short_backtrace::<std[7074de9448f53455]::panicking::begin_panic<rustc_errors[bd68527f243ec694]::ExplicitBug>::{closure#0}, !>
14: 0x7f2da81a69d6 - std[7074de9448f53455]::panicking::begin_panic::<rustc_errors[bd68527f243ec694]::ExplicitBug>
15: 0x7f2da81c3566 - std[7074de9448f53455]::panic::panic_any::<rustc_errors[bd68527f243ec694]::ExplicitBug>
16: 0x7f2da81c30f1 - <rustc_errors[bd68527f243ec694]::HandlerInner>::span_bug::<rustc_span[d87438c6b13c482c]::span_encoding::Span, &alloc[2e12de4c3a4f3fb]::string::String>
17: 0x7f2da81c15a0 - <rustc_errors[bd68527f243ec694]::Handler>::span_bug::<rustc_span[d87438c6b13c482c]::span_encoding::Span, &alloc[2e12de4c3a4f3fb]::string::String>
18: 0x7f2da8206708 - rustc_middle[e2a68416ee813954]::ty::context::tls::with_opt::<rustc_middle[e2a68416ee813954]::util::bug::opt_span_bug_fmt<rustc_span[d87438c6b13c482c]::span_encoding::Span>::{closure#0}, ()>
19: 0x7f2da8206846 - rustc_middle[e2a68416ee813954]::util::bug::opt_span_bug_fmt::<rustc_span[d87438c6b13c482c]::span_encoding::Span>
20: 0x7f2da8206804 - rustc_middle[e2a68416ee813954]::util::bug::span_bug_fmt::<rustc_span[d87438c6b13c482c]::span_encoding::Span>
21: 0x7f2da91dea28 - <rustc_middle[e2a68416ee813954]::ty::consts::Const as rustc_middle[e2a68416ee813954]::ty::fold::TypeFoldable>::try_fold_with::<rustc_middle[e2a68416ee813954]::ty::subst::SubstFolder>
22: 0x7f2da922aff1 - <rustc_middle[e2a68416ee813954]::ty::subst::SubstFolder as rustc_middle[e2a68416ee813954]::ty::fold::TypeFolder>::fold_const
23: 0x7f2da85de70e - <rustc_middle[e2a68416ee813954]::ty::context::TyCtxt>::try_subst_and_normalize_erasing_regions::<rustc_middle[e2a68416ee813954]::mir::ConstantKind>
24: 0x7f2da94a48a4 - <rustc_const_eval[62add1e0e435ad77]::interpret::eval_context::InterpCx<rustc_mir_transform[a4cd593d8ef39143]::const_prop::ConstPropMachine>>::subst_from_current_frame_and_normalize_erasing_regions::<rustc_middle[e2a68416ee813954]::mir::ConstantKind>
25: 0x7f2da948e4cf - <rustc_mir_transform[a4cd593d8ef39143]::const_prop_lint::ConstPropagator>::check_binary_op
26: 0x7f2da85b02f3 - <rustc_mir_transform[a4cd593d8ef39143]::const_prop_lint::ConstPropagator as rustc_middle[e2a68416ee813954]::mir::visit::Visitor>::visit_body
27: 0x7f2da85aec44 - <rustc_mir_transform[a4cd593d8ef39143]::const_prop_lint::ConstProp as rustc_mir_transform[a4cd593d8ef39143]::pass_manager::MirLint>::run_lint
28: 0x7f2da85665a0 - rustc_mir_transform[a4cd593d8ef39143]::pass_manager::run_passes
29: 0x7f2da85bf4bc - rustc_mir_transform[a4cd593d8ef39143]::mir_drops_elaborated_and_const_checked
30: 0x7f2da9770ffc - <rustc_query_system[b4d382c62d3fb0f4]::dep_graph::graph::DepGraph<rustc_middle[e2a68416ee813954]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e2a68416ee813954]::ty::context::TyCtxt, rustc_middle[e2a68416ee813954]::ty::WithOptConstParam<rustc_span[d87438c6b13c482c]::def_id::LocalDefId>, &rustc_data_structures[bb156c26c22ac352]::steal::Steal<rustc_middle[e2a68416ee813954]::mir::Body>>
31: 0x7f2da8cbdd49 - rustc_query_system[b4d382c62d3fb0f4]::query::plumbing::try_execute_query::<rustc_query_impl[af9326b4a8ec607e]::plumbing::QueryCtxt, rustc_query_system[b4d382c62d3fb0f4]::query::caches::DefaultCache<rustc_middle[e2a68416ee813954]::ty::WithOptConstParam<rustc_span[d87438c6b13c482c]::def_id::LocalDefId>, &rustc_data_structures[bb156c26c22ac352]::steal::Steal<rustc_middle[e2a68416ee813954]::mir::Body>>>
32: 0x7f2da8caa20a - <rustc_query_impl[af9326b4a8ec607e]::Queries as rustc_middle[e2a68416ee813954]::ty::query::QueryEngine>::mir_drops_elaborated_and_const_checked
33: 0x7f2da85c071c - rustc_mir_transform[a4cd593d8ef39143]::optimized_mir
34: 0x7f2da9787247 - <rustc_query_system[b4d382c62d3fb0f4]::dep_graph::graph::DepGraph<rustc_middle[e2a68416ee813954]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e2a68416ee813954]::ty::context::TyCtxt, rustc_span[d87438c6b13c482c]::def_id::DefId, &rustc_middle[e2a68416ee813954]::mir::Body>
35: 0x7f2da8ce39ed - rustc_query_system[b4d382c62d3fb0f4]::query::plumbing::try_execute_query::<rustc_query_impl[af9326b4a8ec607e]::plumbing::QueryCtxt, rustc_query_system[b4d382c62d3fb0f4]::query::caches::DefaultCache<rustc_span[d87438c6b13c482c]::def_id::DefId, &rustc_middle[e2a68416ee813954]::mir::Body>>
36: 0x7f2da8caa61e - <rustc_query_impl[af9326b4a8ec607e]::Queries as rustc_middle[e2a68416ee813954]::ty::query::QueryEngine>::optimized_mir
37: 0x7f2da91ac4e7 - <rustc_middle[e2a68416ee813954]::ty::context::TyCtxt>::instance_mir
38: 0x7f2da85424cc - rustc_monomorphize[a5b93f047227dc5b]::collector::collect_neighbours
39: 0x7f2da853f1fa - rustc_monomorphize[a5b93f047227dc5b]::collector::collect_items_rec
40: 0x7f2da853f6d8 - rustc_monomorphize[a5b93f047227dc5b]::collector::collect_items_rec
41: 0x7f2da853f6d8 - rustc_monomorphize[a5b93f047227dc5b]::collector::collect_items_rec
42: 0x7f2da9468dcb - <rustc_session[5cf55b4a9bcfa8ac]::session::Session>::time::<(), rustc_monomorphize[a5b93f047227dc5b]::collector::collect_crate_mono_items::{closure#1}>
43: 0x7f2da94604db - rustc_monomorphize[a5b93f047227dc5b]::collector::collect_crate_mono_items
44: 0x7f2da9464506 - rustc_monomorphize[a5b93f047227dc5b]::partitioning::collect_and_partition_mono_items
45: 0x7f2da979ae74 - <rustc_query_system[b4d382c62d3fb0f4]::dep_graph::graph::DepGraph<rustc_middle[e2a68416ee813954]::dep_graph::dep_node::DepKind>>::with_task::<rustc_middle[e2a68416ee813954]::ty::context::TyCtxt, (), (&std[7074de9448f53455]::collections::hash::set::HashSet<rustc_span[d87438c6b13c482c]::def_id::DefId, core[f48e8397d735e928]::hash::BuildHasherDefault<rustc_hash[1192cda37891db5b]::FxHasher>>, &[rustc_middle[e2a68416ee813954]::mir::mono::CodegenUnit])>
46: 0x7f2da984f0d7 - rustc_query_system[b4d382c62d3fb0f4]::query::plumbing::try_execute_query::<rustc_query_impl[af9326b4a8ec607e]::plumbing::QueryCtxt, rustc_query_system[b4d382c62d3fb0f4]::query::caches::DefaultCache<(), (&std[7074de9448f53455]::collections::hash::set::HashSet<rustc_span[d87438c6b13c482c]::def_id::DefId, core[f48e8397d735e928]::hash::BuildHasherDefault<rustc_hash[1192cda37891db5b]::FxHasher>>, &[rustc_middle[e2a68416ee813954]::mir::mono::CodegenUnit])>>
47: 0x7f2da9889df0 - rustc_query_system[b4d382c62d3fb0f4]::query::plumbing::get_query::<rustc_query_impl[af9326b4a8ec607e]::queries::collect_and_partition_mono_items, rustc_query_impl[af9326b4a8ec607e]::plumbing::QueryCtxt>
48: 0x7f2da97e8052 - <rustc_query_impl[af9326b4a8ec607e]::Queries as rustc_middle[e2a68416ee813954]::ty::query::QueryEngine>::collect_and_partition_mono_items
49: 0x7f2da9342aac - <rustc_codegen_llvm[ced656a9410415d7]::LlvmCodegenBackend as rustc_codegen_ssa[d7b3178ad7beee69]::traits::backend::CodegenBackend>::codegen_crate
50: 0x7f2da93066e7 - <rustc_session[5cf55b4a9bcfa8ac]::session::Session>::time::<alloc[2e12de4c3a4f3fb]::boxed::Box<dyn core[f48e8397d735e928]::any::Any>, rustc_interface[aca4066e2cb604ea]::passes::start_codegen::{closure#0}>
51: 0x7f2da9301bbf - <rustc_interface[aca4066e2cb604ea]::passes::QueryContext>::enter::<<rustc_interface[aca4066e2cb604ea]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[f48e8397d735e928]::result::Result<alloc[2e12de4c3a4f3fb]::boxed::Box<dyn core[f48e8397d735e928]::any::Any>, rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>
52: 0x7f2da932681f - <rustc_interface[aca4066e2cb604ea]::queries::Queries>::ongoing_codegen
53: 0x7f2da92d104b - <rustc_interface[aca4066e2cb604ea]::interface::Compiler>::enter::<rustc_driver[353b86defc14ca1]::run_compiler::{closure#1}::{closure#2}, core[f48e8397d735e928]::result::Result<core[f48e8397d735e928]::option::Option<rustc_interface[aca4066e2cb604ea]::queries::Linker>, rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>
54: 0x7f2da92f3b7f - rustc_span[d87438c6b13c482c]::with_source_map::<core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>, rustc_interface[aca4066e2cb604ea]::interface::create_compiler_and_run<core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>, rustc_driver[353b86defc14ca1]::run_compiler::{closure#1}>::{closure#1}>
55: 0x7f2da92d1c37 - <scoped_tls[f8c24a3c7c5578e]::ScopedKey<rustc_span[d87438c6b13c482c]::SessionGlobals>>::set::<rustc_interface[aca4066e2cb604ea]::interface::run_compiler<core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>, rustc_driver[353b86defc14ca1]::run_compiler::{closure#1}>::{closure#0}, core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>
56: 0x7f2da92e6bef - std[7074de9448f53455]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[aca4066e2cb604ea]::util::run_in_thread_pool_with_globals<rustc_interface[aca4066e2cb604ea]::interface::run_compiler<core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>, rustc_driver[353b86defc14ca1]::run_compiler::{closure#1}>::{closure#0}, core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>::{closure#0}, core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>
57: 0x7f2da92e6d29 - <<std[7074de9448f53455]::thread::Builder>::spawn_unchecked_<rustc_interface[aca4066e2cb604ea]::util::run_in_thread_pool_with_globals<rustc_interface[aca4066e2cb604ea]::interface::run_compiler<core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>, rustc_driver[353b86defc14ca1]::run_compiler::{closure#1}>::{closure#0}, core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>::{closure#0}, core[f48e8397d735e928]::result::Result<(), rustc_errors[bd68527f243ec694]::ErrorGuaranteed>>::{closure#1} as core[f48e8397d735e928]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
58: 0x7f2da69882b3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h9ead32ab7d5c798d
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/alloc/src/boxed.rs:1886:9
59: 0x7f2da69882b3 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h2e6b5f116485518d
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/alloc/src/boxed.rs:1886:9
60: 0x7f2da69882b3 - std::sys::unix::thread::Thread::new::thread_start::h69816c82f6439aed
at /rustc/e0944922007e1bb4fe59809293acf4364410cccc/library/std/src/sys/unix/thread.rs:108:17
61: 0x7f2da689c609 - start_thread
at /build/glibc-sMfBJT/glibc-2.31/nptl/pthread_create.c:477:8
62: 0x7f2da67bf163 - clone
63: 0x0 - <unknown>