ICE: value <= 0xFFFF_FF00

Question

ICE: value <= 0xFFFF_FF00

matthiaskrgr opened this issue 2 years ago · 4 comments

Code

#![allow(incomplete_features)]
#![feature(return_position_impl_trait_in_trait)]
#![crate_type ="lib"]

trait Trait {
    type Type;

    fn method(&self) -> impl Trait<Type = impl Trait<Type = impl Sized + '_> + '_>;
}

Error output

<output>

Backtrace

thread 'rustc' panicked at 'assertion failed: value <= 0xFFFF_FF00', /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/compiler/rustc_type_ir/src/lib.rs:279:1
stack backtrace:
   0:     0x7f5c5eec750a - std::backtrace_rs::backtrace::libunwind::trace::hca5b94e57c77ccf5
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/../../backtrace/src/backtrace/libunwind.rs:93:5
   1:     0x7f5c5eec750a - std::backtrace_rs::backtrace::trace_unsynchronized::h5b5fce74d82f8778
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7f5c5eec750a - std::sys_common::backtrace::_print_fmt::ha47e7aaa1d2225ec
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys_common/backtrace.rs:65:5
   3:     0x7f5c5eec750a - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::ha1aaba92be89501b
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7f5c5ef2ab3e - core::fmt::write::h750a8e721825859f
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/core/src/fmt/mod.rs:1232:17
   5:     0x7f5c5eeba375 - std::io::Write::write_fmt::hbf6015e32697f7ba
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/io/mod.rs:1684:15
   6:     0x7f5c5eec72d5 - std::sys_common::backtrace::_print::h301c6b6cac7c0a3a
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys_common/backtrace.rs:47:5
   7:     0x7f5c5eec72d5 - std::sys_common::backtrace::print::h7f921f37b0542aab
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys_common/backtrace.rs:34:9
   8:     0x7f5c5eeca04f - std::panicking::default_hook::{{closure}}::ha1e8e5c596b5be71
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/panicking.rs:271:22
   9:     0x7f5c5eec9d8b - std::panicking::default_hook::hb0497d64ba7aeb9b
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/panicking.rs:290:9
  10:     0x7f5c5dc65475 - rustc_driver_impl[190cb2184ae08abb]::DEFAULT_HOOK::{closure#0}::{closure#0}
  11:     0x7f5c5eeca88d - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h5fe0c368b54c8ed7
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/alloc/src/boxed.rs:2002:9
  12:     0x7f5c5eeca88d - std::panicking::rust_panic_with_hook::hde905c542c1ea61a
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/panicking.rs:696:13
  13:     0x7f5c5eeca5c2 - std::panicking::begin_panic_handler::{{closure}}::hb8e5dc8ca1bc0593
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/panicking.rs:581:13
  14:     0x7f5c5eec7976 - std::sys_common::backtrace::__rust_end_short_backtrace::h5b7e4b9492630e37
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys_common/backtrace.rs:150:18
  15:     0x7f5c5eeca312 - rust_begin_unwind
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/panicking.rs:579:5
  16:     0x7f5c5ef26e93 - core::panicking::panic_fmt::hb9f9af2a2de3db20
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/core/src/panicking.rs:64:14
  17:     0x7f5c5ef26f2d - core::panicking::panic::h52f24dac4e3af747
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/core/src/panicking.rs:114:5
  18:     0x7f5c5ea4c020 - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_ty::{closure#0}
  19:     0x7f5c5ea5c342 - <rustc_middle[d8dcb3e1f9b6a1d3]::ty::subst::GenericArg as rustc_type_ir[1cfc6eb3c12c01ce]::fold::TypeFoldable<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::fold::RegionFolder>
  20:     0x7f5c5ea7d4bf - <&rustc_middle[d8dcb3e1f9b6a1d3]::ty::list::List<rustc_middle[d8dcb3e1f9b6a1d3]::ty::subst::GenericArg> as rustc_type_ir[1cfc6eb3c12c01ce]::fold::TypeFoldable<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::fold::RegionFolder>
  21:     0x7f5c5ea66d65 - <rustc_middle[d8dcb3e1f9b6a1d3]::ty::sty::AliasTy as rustc_type_ir[1cfc6eb3c12c01ce]::fold::TypeFoldable<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::try_fold_with::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::fold::RegionFolder>
  22:     0x7f5c5ea4bb56 - <rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>::fold_regions::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::sty::AliasTy, <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_ty::{closure#0}>
  23:     0x7f5c5cc77cc8 - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_ty
  24:     0x7f5c5ea7857e - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_binder::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::PredicateKind>
  25:     0x7f5c5cc77e68 - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_ty
  26:     0x7f5c5ea7857e - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_binder::<rustc_middle[d8dcb3e1f9b6a1d3]::ty::PredicateKind>
  27:     0x7f5c5cc77e68 - <rustc_ty_utils[3e59128907a02351]::ty::ImplTraitInTraitFinder as rustc_type_ir[1cfc6eb3c12c01ce]::visit::TypeVisitor<rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::TyCtxt>>::visit_ty
  28:     0x7f5c5cde1b78 - rustc_ty_utils[3e59128907a02351]::ty::param_env
  29:     0x7f5c5cddf29f - rustc_query_system[1a66d6a5882ef44d]::query::plumbing::try_execute_query::<rustc_query_impl[9c3c364151da071f]::queries::param_env, rustc_query_impl[9c3c364151da071f]::plumbing::QueryCtxt>
  30:     0x7f5c5c47b7f1 - rustc_hir_analysis[60e36e2803dc18bc]::check::wfcheck::check_associated_item
  31:     0x7f5c5c476ed9 - rustc_hir_analysis[60e36e2803dc18bc]::check::wfcheck::check_well_formed
  32:     0x7f5c5c0fe2bd - rustc_query_system[1a66d6a5882ef44d]::query::plumbing::try_execute_query::<rustc_query_impl[9c3c364151da071f]::queries::check_well_formed, rustc_query_impl[9c3c364151da071f]::plumbing::QueryCtxt>
  33:     0x7f5c5c0fdc5e - <rustc_query_impl[9c3c364151da071f]::Queries as rustc_middle[d8dcb3e1f9b6a1d3]::ty::query::QueryEngine>::check_well_formed
  34:     0x7f5c5cf72238 - rustc_data_structures[d80b863c6c14e96e]::sync::par_for_each_in::<&[rustc_hir[4f3ccf67fd44b448]::hir::TraitItemId], <rustc_middle[d8dcb3e1f9b6a1d3]::hir::ModuleItems>::par_trait_items<rustc_hir_analysis[60e36e2803dc18bc]::check::wfcheck::check_mod_type_wf::{closure#2}>::{closure#0}>
  35:     0x7f5c5cf7213c - rustc_hir_analysis[60e36e2803dc18bc]::check::wfcheck::check_mod_type_wf
  36:     0x7f5c5d293b0e - rustc_query_system[1a66d6a5882ef44d]::query::plumbing::try_execute_query::<rustc_query_impl[9c3c364151da071f]::queries::check_mod_type_wf, rustc_query_impl[9c3c364151da071f]::plumbing::QueryCtxt>
  37:     0x7f5c5d293693 - <rustc_query_impl[9c3c364151da071f]::Queries as rustc_middle[d8dcb3e1f9b6a1d3]::ty::query::QueryEngine>::check_mod_type_wf
  38:     0x7f5c5be71de8 - rustc_data_structures[d80b863c6c14e96e]::sync::par_for_each_in::<&[rustc_hir[4f3ccf67fd44b448]::hir_id::OwnerId], <rustc_middle[d8dcb3e1f9b6a1d3]::hir::map::Map>::par_for_each_module<rustc_hir_analysis[60e36e2803dc18bc]::check_crate::{closure#5}::{closure#0}::{closure#0}>::{closure#0}>
  39:     0x7f5c5be71c70 - <rustc_session[de52af1e8e7b6fd9]::session::Session>::track_errors::<rustc_hir_analysis[60e36e2803dc18bc]::check_crate::{closure#5}, ()>
  40:     0x7f5c5be6e660 - rustc_hir_analysis[60e36e2803dc18bc]::check_crate
  41:     0x7f5c5be65d25 - rustc_interface[c60781b202b529bb]::passes::analysis
  42:     0x7f5c5d473b9c - rustc_query_system[1a66d6a5882ef44d]::query::plumbing::try_execute_query::<rustc_query_impl[9c3c364151da071f]::queries::analysis, rustc_query_impl[9c3c364151da071f]::plumbing::QueryCtxt>
  43:     0x7f5c5d473890 - <rustc_query_impl[9c3c364151da071f]::Queries as rustc_middle[d8dcb3e1f9b6a1d3]::ty::query::QueryEngine>::analysis
  44:     0x7f5c5d29d899 - <rustc_middle[d8dcb3e1f9b6a1d3]::ty::context::GlobalCtxt>::enter::<rustc_driver_impl[190cb2184ae08abb]::run_compiler::{closure#1}::{closure#2}::{closure#4}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>
  45:     0x7f5c5ce29dc8 - rustc_span[e39f9d1da20fb520]::with_source_map::<core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>, rustc_interface[c60781b202b529bb]::interface::run_compiler<core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>, rustc_driver_impl[190cb2184ae08abb]::run_compiler::{closure#1}>::{closure#0}::{closure#0}>
  46:     0x7f5c5ce218e0 - <scoped_tls[3baa4ec3dd04ff72]::ScopedKey<rustc_span[e39f9d1da20fb520]::SessionGlobals>>::set::<rustc_interface[c60781b202b529bb]::interface::run_compiler<core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>, rustc_driver_impl[190cb2184ae08abb]::run_compiler::{closure#1}>::{closure#0}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>
  47:     0x7f5c5ce20fc2 - std[75e4c6f671155ce4]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[c60781b202b529bb]::util::run_in_thread_pool_with_globals<rustc_interface[c60781b202b529bb]::interface::run_compiler<core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>, rustc_driver_impl[190cb2184ae08abb]::run_compiler::{closure#1}>::{closure#0}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>
  48:     0x7f5c5ce20d6a - <<std[75e4c6f671155ce4]::thread::Builder>::spawn_unchecked_<rustc_interface[c60781b202b529bb]::util::run_in_thread_pool_with_globals<rustc_interface[c60781b202b529bb]::interface::run_compiler<core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>, rustc_driver_impl[190cb2184ae08abb]::run_compiler::{closure#1}>::{closure#0}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[86d79cd3dd753e85]::result::Result<(), rustc_span[e39f9d1da20fb520]::ErrorGuaranteed>>::{closure#1} as core[86d79cd3dd753e85]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  49:     0x7f5c5eed4783 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h3341c80cf784afb0
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/alloc/src/boxed.rs:1988:9
  50:     0x7f5c5eed4783 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h6a4397435c8c4587
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/alloc/src/boxed.rs:1988:9
  51:     0x7f5c5eed4783 - std::sys::unix::thread::Thread::new::thread_start::h4d87276efd9893f6
                               at /rustc/ab654863c3d50482f260cf862647f1fe0ff5e010/library/std/src/sys/unix/thread.rs:108:17
  52:     0x7f5c5a862bb5 - <unknown>
  53:     0x7f5c5a8e4d90 - <unknown>
  54:                0x0 - <unknown>

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 1.70.0-nightly (ab654863c 2023-03-15) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [param_env] computing normalized predicates of `Trait::method`
#1 [check_well_formed] checking that `Trait::method` is well-formed
#2 [check_mod_type_wf] checking that types are well-formed in top-level module
#3 [analysis] running analysis passes on this crate
end of query stack

Answer 1 · 2023-03-16T22:59:23.000Z

probably #108203

Regression in rust-lang-ci@bdb8f15

searched nightlies: from nightly-2023-02-15 to nightly-2023-03-16
regressed nightly: nightly-2023-02-20
searched commit range: 4507fda...7aa413d
regressed commit: dc89a80

bisected with cargo-bisect-rustc v0.6.5

Host triple: x86_64-unknown-linux-gnu
Reproduce with:

cargo bisect-rustc --test-dir=/home/matthias/vcs/github/rust_bisect/foo

Answer 2 · 2023-03-16T23:00:13.000Z

It's actually #108583

Answer 3 · 2023-03-16T23:01:20.000Z

Or at least, the logic broke because of #108583, so the ICE message probably changed in that PR from some other message, to this one in the title.

Answer 4 · 2023-03-16T23:18:33.000Z

@rustbot label +S-bug-has-mcve

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