ICE: "failed to normalize" with -Zmir-opt-level=3 --emit=mir

[matthiaskrgr]

Code

pub trait Associate {
    type Associated;
}

pub struct Wrap<'a> {
    pub field: &'a i32,
}

pub trait Create<T> {
    fn create() -> Self;
}

pub fn oh_no<'a, T>()
where
    Wrap<'a>: Associate,
    <Wrap<'a> as Associate>::Associated: Create<T>,
{
    <Wrap<'a> as Associate>::Associated::create();
}

pub fn main() {}

Meta

rustc --version --verbose:

rustc 1.63.0-nightly (e71440575 2022-06-02)
binary: rustc
commit-hash: e71440575c930dcecac288b7c3536410d688b351
commit-date: 2022-06-02
host: x86_64-unknown-linux-gnu
release: 1.63.0-nightly
LLVM version: 14.0.4

Error output

rustc crash.rs -Zmir-opt-level=3 --emit=mir

<output>

Backtrace

error: internal compiler error: compiler/rustc_middle/src/ty/normalize_erasing_regions.rs:179:90: Failed to normalize <Wrap as Associate>::Associated, maybe try to call `try_normalize_erasing_regions` instead

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/e71440575c930dcecac288b7c3536410d688b351/compiler/rustc_errors/src/lib.rs:1335:9
stack backtrace:
   0:     0x7fd6a0c9df1d - std::backtrace_rs::backtrace::libunwind::trace::h327a731c868216d5
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7fd6a0c9df1d - std::backtrace_rs::backtrace::trace_unsynchronized::heaaf896b92db91c6
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7fd6a0c9df1d - std::sys_common::backtrace::_print_fmt::h633ffd029934626e
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/sys_common/backtrace.rs:66:5
   3:     0x7fd6a0c9df1d - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h7ef8e7d367aa18c8
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/sys_common/backtrace.rs:45:22
   4:     0x7fd6a0cf9bfc - core::fmt::write::h3271b30cdab07152
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/core/src/fmt/mod.rs:1196:17
   5:     0x7fd6a0c8f6b1 - std::io::Write::write_fmt::h7ecbce96a7b72ba9
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/io/mod.rs:1654:15
   6:     0x7fd6a0ca0c05 - std::sys_common::backtrace::_print::hddfa9a0a2b4a15e9
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/sys_common/backtrace.rs:48:5
   7:     0x7fd6a0ca0c05 - std::sys_common::backtrace::print::h2601f513b7e7fdd6
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/sys_common/backtrace.rs:35:9
   8:     0x7fd6a0ca0c05 - std::panicking::default_hook::{{closure}}::h65cd78d378ef7cc4
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/panicking.rs:295:22
   9:     0x7fd6a0ca0926 - std::panicking::default_hook::h7d0d896df43ad640
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/panicking.rs:314:9
  10:     0x7fd6a14f9991 - rustc_driver[f3a1b7bdd5b0cce4]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7fd6a0ca12da - std::panicking::rust_panic_with_hook::h95bf9c9282d315b1
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/panicking.rs:702:17
  12:     0x7fd6a25e2651 - std[4d9942a2ca97a94f]::panicking::begin_panic::<rustc_errors[cd24e25f3e8b264c]::ExplicitBug>::{closure#0}
  13:     0x7fd6a25e20c6 - std[4d9942a2ca97a94f]::sys_common::backtrace::__rust_end_short_backtrace::<std[4d9942a2ca97a94f]::panicking::begin_panic<rustc_errors[cd24e25f3e8b264c]::ExplicitBug>::{closure#0}, !>
  14:     0x7fd6a253b2c6 - std[4d9942a2ca97a94f]::panicking::begin_panic::<rustc_errors[cd24e25f3e8b264c]::ExplicitBug>
  15:     0x7fd6a2572dc6 - std[4d9942a2ca97a94f]::panic::panic_any::<rustc_errors[cd24e25f3e8b264c]::ExplicitBug>
  16:     0x7fd6a256f365 - <rustc_errors[cd24e25f3e8b264c]::HandlerInner>::bug::<&alloc[e4e4c5ef8a7ed511]::string::String>
  17:     0x7fd6a256ee40 - <rustc_errors[cd24e25f3e8b264c]::Handler>::bug::<&alloc[e4e4c5ef8a7ed511]::string::String>
  18:     0x7fd6a25bc0bd - rustc_middle[647e80b7dabd2c1a]::ty::context::tls::with_opt::<rustc_middle[647e80b7dabd2c1a]::util::bug::opt_span_bug_fmt<rustc_span[dc47ef931624f33a]::span_encoding::Span>::{closure#0}, ()>
  19:     0x7fd6a25bc216 - rustc_middle[647e80b7dabd2c1a]::util::bug::opt_span_bug_fmt::<rustc_span[dc47ef931624f33a]::span_encoding::Span>
  20:     0x7fd6a25bc193 - rustc_middle[647e80b7dabd2c1a]::util::bug::bug_fmt
  21:     0x7fd6a362ec51 - <rustc_middle[647e80b7dabd2c1a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder as rustc_middle[647e80b7dabd2c1a]::ty::fold::TypeFolder>::fold_ty
  22:     0x7fd6a16a1589 - <rustc_middle[647e80b7dabd2c1a]::ty::subst::GenericArg as rustc_middle[647e80b7dabd2c1a]::ty::fold::TypeFoldable>::try_fold_with::<rustc_middle[647e80b7dabd2c1a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder>
  23:     0x7fd6a16fe51d - <&rustc_middle[647e80b7dabd2c1a]::ty::list::List<rustc_middle[647e80b7dabd2c1a]::ty::subst::GenericArg> as rustc_middle[647e80b7dabd2c1a]::ty::fold::TypeFoldable>::try_fold_with::<rustc_middle[647e80b7dabd2c1a]::ty::normalize_erasing_regions::NormalizeAfterErasingRegionsFolder>
  24:     0x7fd6a17457d1 - <rustc_middle[647e80b7dabd2c1a]::ty::context::TyCtxt>::normalize_erasing_regions::<&rustc_middle[647e80b7dabd2c1a]::ty::list::List<rustc_middle[647e80b7dabd2c1a]::ty::subst::GenericArg>>
  25:     0x7fd6a16a781c - <rustc_mir_transform[65cc503a25df7ca9]::inline::Inliner>::process_blocks
  26:     0x7fd6a16a745f - <rustc_mir_transform[65cc503a25df7ca9]::inline::Inline as rustc_middle[647e80b7dabd2c1a]::mir::MirPass>::run_pass
  27:     0x7fd6a291caf0 - rustc_mir_transform[65cc503a25df7ca9]::pass_manager::run_passes
  28:     0x7fd6a297eccd - rustc_mir_transform[65cc503a25df7ca9]::optimized_mir
  29:     0x7fd6a30aebe7 - rustc_query_system[24753986935b348b]::query::plumbing::try_execute_query::<rustc_query_impl[9820119e81209a0f]::plumbing::QueryCtxt, rustc_query_system[24753986935b348b]::query::caches::DefaultCache<rustc_span[dc47ef931624f33a]::def_id::DefId, &rustc_middle[647e80b7dabd2c1a]::mir::Body>>
  30:     0x7fd6a30753be - <rustc_query_impl[9820119e81209a0f]::Queries as rustc_middle[647e80b7dabd2c1a]::ty::query::QueryEngine>::optimized_mir
  31:     0x7fd6a3589426 - <rustc_middle[647e80b7dabd2c1a]::ty::context::TyCtxt>::instance_mir
  32:     0x7fd6a2549855 - rustc_middle[647e80b7dabd2c1a]::mir::pretty::write_mir_pretty
  33:     0x7fd6a171bf90 - rustc_mir_transform[65cc503a25df7ca9]::dump_mir::emit_mir
  34:     0x7fd6a36eadae - <rustc_interface[78799bf1035473cf]::passes::QueryContext>::enter::<<rustc_interface[78799bf1035473cf]::queries::Queries>::ongoing_codegen::{closure#0}::{closure#0}, core[4ccf542b86124621]::result::Result<alloc[e4e4c5ef8a7ed511]::boxed::Box<dyn core[4ccf542b86124621]::any::Any>, rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>
  35:     0x7fd6a37108ef - <rustc_interface[78799bf1035473cf]::queries::Queries>::ongoing_codegen
  36:     0x7fd6a36b913b - <rustc_interface[78799bf1035473cf]::interface::Compiler>::enter::<rustc_driver[f3a1b7bdd5b0cce4]::run_compiler::{closure#1}::{closure#2}, core[4ccf542b86124621]::result::Result<core[4ccf542b86124621]::option::Option<rustc_interface[78799bf1035473cf]::queries::Linker>, rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>
  37:     0x7fd6a36dc92f - rustc_span[dc47ef931624f33a]::with_source_map::<core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>, rustc_interface[78799bf1035473cf]::interface::create_compiler_and_run<core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>, rustc_driver[f3a1b7bdd5b0cce4]::run_compiler::{closure#1}>::{closure#1}>
  38:     0x7fd6a36b9d32 - <scoped_tls[dcacf9d4db118214]::ScopedKey<rustc_span[dc47ef931624f33a]::SessionGlobals>>::set::<rustc_interface[78799bf1035473cf]::interface::run_compiler<core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>, rustc_driver[f3a1b7bdd5b0cce4]::run_compiler::{closure#1}>::{closure#0}, core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>
  39:     0x7fd6a36cf51f - std[4d9942a2ca97a94f]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[78799bf1035473cf]::util::run_in_thread_pool_with_globals<rustc_interface[78799bf1035473cf]::interface::run_compiler<core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>, rustc_driver[f3a1b7bdd5b0cce4]::run_compiler::{closure#1}>::{closure#0}, core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>::{closure#0}, core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>
  40:     0x7fd6a36cf669 - <<std[4d9942a2ca97a94f]::thread::Builder>::spawn_unchecked_<rustc_interface[78799bf1035473cf]::util::run_in_thread_pool_with_globals<rustc_interface[78799bf1035473cf]::interface::run_compiler<core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>, rustc_driver[f3a1b7bdd5b0cce4]::run_compiler::{closure#1}>::{closure#0}, core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>::{closure#0}, core[4ccf542b86124621]::result::Result<(), rustc_errors[cd24e25f3e8b264c]::ErrorGuaranteed>>::{closure#1} as core[4ccf542b86124621]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  41:     0x7fd6a0cab203 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::hadf0c51f0daff86d
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/alloc/src/boxed.rs:1927:9
  42:     0x7fd6a0cab203 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7b0c3bd4aa754c93
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/alloc/src/boxed.rs:1927:9
  43:     0x7fd6a0cab203 - std::sys::unix::thread::Thread::new::thread_start::h03d160ee3ff57306
                               at /rustc/e71440575c930dcecac288b7c3536410d688b351/library/std/src/sys/unix/thread.rs:108:17
  44:     0x7fd6a0a835c2 - start_thread
  45:     0x7fd6a0b08584 - __clone
  46:                0x0 - <unknown>

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 (e71440575 2022-06-02) running on x86_64-unknown-linux-gnu

note: compiler flags: -Z mir-opt-level=3

query stack during panic:
#0 [optimized_mir] optimizing MIR for `oh_no`
end of query stack
error: aborting due to previous error