ICE with dyn_star: should be handled by try_coerce

[jruderman]

Found with a modified fuzz-rustc

Code

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

trait Tr {}
fn f(x: dyn* Tr) -> usize {
    x as usize
}
fn main() {}

Error output

error: internal compiler error: compiler/rustc_hir_typeck/src/cast.rs:871: should be handled by try_coerce

Full output including backtrace

error: internal compiler error: compiler/rustc_hir_typeck/src/cast.rs:871:21: should be handled by `try_coerce`

thread 'rustc' panicked at 'Box<dyn Any>', /rustc/1eb62b1235fd77200e6bd967d70e83c0f2497233/compiler/rustc_errors/src/lib.rs:1575:9
stack backtrace:
   0:        0x10ed412a6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h1901ec5c10c2d477
   1:        0x10ed9fe2a - core::fmt::write::h453ba3b763f16dfb
   2:        0x10ed3364c - std::io::Write::write_fmt::h35935f9cf41659e0
   3:        0x10ed4108a - std::sys_common::backtrace::print::h48cb2ddd4d16ad05
   4:        0x10ed443d3 - std::panicking::default_hook::{{closure}}::hf85401495f021b7c
   5:        0x10ed44128 - std::panicking::default_hook::hcc698ed67aaec0db
   6:        0x11ea5b5fd - rustc_driver[c6bc39476a4ff69]::DEFAULT_HOOK::{closure#0}::{closure#0}
   7:        0x10ed44bb7 - std::panicking::rust_panic_with_hook::h4686e220b4123e59
   8:        0x1232372b7 - std[e853a6d0ec043b70]::panicking::begin_panic::<rustc_errors[5974999511236221]::ExplicitBug>::{closure#0}
   9:        0x1232369c9 - std[e853a6d0ec043b70]::sys_common::backtrace::__rust_end_short_backtrace::<std[e853a6d0ec043b70]::panicking::begin_panic<rustc_errors[5974999511236221]::ExplicitBug>::{closure#0}, !>
  10:        0x1238cb589 - std[e853a6d0ec043b70]::panicking::begin_panic::<rustc_errors[5974999511236221]::ExplicitBug>
  11:        0x12319f469 - std[e853a6d0ec043b70]::panic::panic_any::<rustc_errors[5974999511236221]::ExplicitBug>
  12:        0x12319e31d - <rustc_errors[5974999511236221]::HandlerInner>::bug::<&alloc[374a688e4a400e73]::string::String>
  13:        0x12319dde7 - <rustc_errors[5974999511236221]::Handler>::bug::<&alloc[374a688e4a400e73]::string::String>
  14:        0x12330ae43 - rustc_middle[d5319f07d231351a]::ty::context::tls::with_context_opt::<rustc_middle[d5319f07d231351a]::ty::context::tls::with_opt<rustc_middle[d5319f07d231351a]::util::bug::opt_span_bug_fmt<rustc_span[db835ecaf6c42563]::span_encoding::Span>::{closure#0}, ()>::{closure#0}, ()>
  15:        0x123310191 - rustc_middle[d5319f07d231351a]::util::bug::opt_span_bug_fmt::<rustc_span[db835ecaf6c42563]::span_encoding::Span>
  16:        0x1238cf66e - rustc_middle[d5319f07d231351a]::util::bug::bug_fmt
  17:        0x1212c9dad - <rustc_hir_typeck[1fa5b17a40641e23]::cast::CastCheck>::do_check
  18:        0x1212cb4dd - <rustc_hir_typeck[1fa5b17a40641e23]::cast::CastCheck>::check
  19:        0x121216a28 - <rustc_hir_typeck[1fa5b17a40641e23]::fn_ctxt::FnCtxt>::check_casts
  20:        0x121336d99 - <rustc_hir_typeck[1fa5b17a40641e23]::inherited::InheritedBuilder>::enter::<rustc_hir_typeck[1fa5b17a40641e23]::typeck_with_fallback<rustc_hir_typeck[1fa5b17a40641e23]::typeck::{closure#0}>::{closure#0}::{closure#1}, &rustc_middle[d5319f07d231351a]::ty::context::TypeckResults>
  21:        0x1212d6fa6 - rustc_hir_typeck[1fa5b17a40641e23]::typeck
  22:        0x1222e037f - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::try_execute_query::<rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt, rustc_query_system[91c4ad596cfd42fe]::query::caches::VecCache<rustc_span[db835ecaf6c42563]::def_id::LocalDefId, &rustc_middle[d5319f07d231351a]::ty::context::TypeckResults>>
  23:        0x12236aac0 - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::get_query::<rustc_query_impl[5858643fdf1b29eb]::queries::typeck, rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt>
  24:        0x12139573b - rustc_data_structures[8f5aaa015017f2be]::sync::par_for_each_in::<&[rustc_span[db835ecaf6c42563]::def_id::LocalDefId], <rustc_middle[d5319f07d231351a]::hir::map::Map>::par_body_owners<rustc_hir_typeck[1fa5b17a40641e23]::typeck_item_bodies::{closure#0}>::{closure#0}>
  25:        0x1212d697d - rustc_hir_typeck[1fa5b17a40641e23]::typeck_item_bodies
  26:        0x1222be888 - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::try_execute_query::<rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt, rustc_query_system[91c4ad596cfd42fe]::query::caches::DefaultCache<(), ()>>
  27:        0x12235dfbd - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::get_query::<rustc_query_impl[5858643fdf1b29eb]::queries::typeck_item_bodies, rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt>
  28:        0x12147d51e - <rustc_session[bf9d936332845243]::session::Session>::time::<(), rustc_hir_analysis[59925a650e5b0dbf]::check_crate::{closure#7}>
  29:        0x12158e912 - rustc_hir_analysis[59925a650e5b0dbf]::check_crate
  30:        0x11eb2418a - rustc_interface[6b0baa6f0acee236]::passes::analysis
  31:        0x1222b078b - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::try_execute_query::<rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt, rustc_query_system[91c4ad596cfd42fe]::query::caches::DefaultCache<(), core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>>
  32:        0x12236ae8d - rustc_query_system[91c4ad596cfd42fe]::query::plumbing::get_query::<rustc_query_impl[5858643fdf1b29eb]::queries::analysis, rustc_query_impl[5858643fdf1b29eb]::plumbing::QueryCtxt>
  33:        0x11e9ed6d7 - <rustc_interface[6b0baa6f0acee236]::passes::QueryContext>::enter::<rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}::{closure#2}::{closure#2}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>
  34:        0x11ea33b75 - <rustc_interface[6b0baa6f0acee236]::interface::Compiler>::enter::<rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}::{closure#2}, core[e7c8723dd1d9fd02]::result::Result<core[e7c8723dd1d9fd02]::option::Option<rustc_interface[6b0baa6f0acee236]::queries::Linker>, rustc_errors[5974999511236221]::ErrorGuaranteed>>
  35:        0x11e9cfd5d - rustc_span[db835ecaf6c42563]::with_source_map::<core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>, rustc_interface[6b0baa6f0acee236]::interface::run_compiler<core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>, rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  36:        0x11ea26a9d - <scoped_tls[9dceb67bf45baec5]::ScopedKey<rustc_span[db835ecaf6c42563]::SessionGlobals>>::set::<rustc_interface[6b0baa6f0acee236]::interface::run_compiler<core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>, rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}>::{closure#0}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>
  37:        0x11e9f5ffa - std[e853a6d0ec043b70]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[6b0baa6f0acee236]::util::run_in_thread_pool_with_globals<rustc_interface[6b0baa6f0acee236]::interface::run_compiler<core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>, rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}>::{closure#0}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>
  38:        0x11e9d62a5 - <<std[e853a6d0ec043b70]::thread::Builder>::spawn_unchecked_<rustc_interface[6b0baa6f0acee236]::util::run_in_thread_pool_with_globals<rustc_interface[6b0baa6f0acee236]::interface::run_compiler<core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>, rustc_driver[c6bc39476a4ff69]::run_compiler::{closure#1}>::{closure#0}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[e7c8723dd1d9fd02]::result::Result<(), rustc_errors[5974999511236221]::ErrorGuaranteed>>::{closure#1} as core[e7c8723dd1d9fd02]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  39:        0x10ed4de87 - std::sys::unix::thread::Thread::new::thread_start::hb253bfeab5e611e1
  40:     0x7ff8083354e1 - __pthread_start

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 1.67.0-nightly (1eb62b123 2022-11-27) running on x86_64-apple-darwin

query stack during panic:
#0 [typeck] type-checking `f`
#1 [typeck_item_bodies] type-checking all item bodies
#2 [analysis] running analysis passes on this crate
end of query stack

Regression

Regression in nightly-2022-10-16 from #101832 (@compiler-errors)

Version

rustc 1.67.0-nightly (1eb62b123 2022-11-27)
binary: rustc
commit-hash: 1eb62b1235fd77200e6bd967d70e83c0f2497233
commit-date: 2022-11-27
host: x86_64-apple-darwin
release: 1.67.0-nightly
LLVM version: 15.0.4

@rustbot label +F-dyn_star