ICE: could not resolve DefId

[matthiaskrgr]

auto-reduced (treereduce-rust):

#![feature(non_lifetime_binders)]

trait Trait<T: ?Sized> {}

fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
    16
}

original:

// check-pass

#![feature(non_lifetime_binders)]
//~^ WARN the feature `non_lifetime_binders` is incomplete

trait Trait<T: ?Sized> {}

impl<T: ?Sized> Trait<T> for i32 {}

fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
    16
}

fn main() {
    let _ = produce();
}

Version information

rustc 1.78.0-nightly (f8131a48a 2024-02-21)
binary: rustc
commit-hash: f8131a48a46ac3bc8a3d0fe0477055b132cffdc3
commit-date: 2024-02-21
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 18.1.0

Command:
/home/matthias/.rustup/toolchains/master/bin/rustc

Program output

warning: the feature `non_lifetime_binders` is incomplete and may not be safe to use and/or cause compiler crashes
 --> /tmp/icemaker_global_tempdir.0emJgmZ88e4H/rustc_testrunner_tmpdir_reporting.nzVpYvTIjOr1/mvce.rs:1:12
  |
1 | #![feature(non_lifetime_binders)]
  |            ^^^^^^^^^^^^^^^^^^^^
  |
  = note: see issue #108185 <https://github.com/rust-lang/rust/issues/108185> for more information
  = note: `#[warn(incomplete_features)]` on by default

error[E0601]: `main` function not found in crate `mvce`
 --> /tmp/icemaker_global_tempdir.0emJgmZ88e4H/rustc_testrunner_tmpdir_reporting.nzVpYvTIjOr1/mvce.rs:7:2
  |
7 | }
  |  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.0emJgmZ88e4H/rustc_testrunner_tmpdir_reporting.nzVpYvTIjOr1/mvce.rs`

error[E0220]: associated type `Assoc` not found for `Trait`
 --> /tmp/icemaker_global_tempdir.0emJgmZ88e4H/rustc_testrunner_tmpdir_reporting.nzVpYvTIjOr1/mvce.rs:5:39
  |
5 | fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
  |                                       ^^^^^ associated type `Assoc` not found

error: internal compiler error: could not resolve DefId(0:6 ~ mvce[8c01]::produce::T)
 --> /tmp/icemaker_global_tempdir.0emJgmZ88e4H/rustc_testrunner_tmpdir_reporting.nzVpYvTIjOr1/mvce.rs:5:58
  |
5 | fn produce() -> impl for<T> Trait<(), Assoc = impl Trait<T>> {
  |                                                          ^

thread 'rustc' panicked at compiler/rustc_hir_analysis/src/collect/resolve_bound_vars.rs:1470:14:
Box<dyn Any>
stack backtrace:
   0:     0x7ffba3b8caf6 - std::backtrace_rs::backtrace::libunwind::trace::hbec2edc838b433e2
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
   1:     0x7ffba3b8caf6 - std::backtrace_rs::backtrace::trace_unsynchronized::h88c30257ee0dd166
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
   2:     0x7ffba3b8caf6 - std::sys_common::backtrace::_print_fmt::h9176654d509e3088
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/sys_common/backtrace.rs:68:5
   3:     0x7ffba3b8caf6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h671feaee1776bf19
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/sys_common/backtrace.rs:44:22
   4:     0x7ffba3bdda7c - core::fmt::rt::Argument::fmt::h59605c83ae32d935
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/core/src/fmt/rt.rs:142:9
   5:     0x7ffba3bdda7c - core::fmt::write::hf7af8dfcfd20db5b
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/core/src/fmt/mod.rs:1120:17
   6:     0x7ffba3b814bf - std::io::Write::write_fmt::h92a5dbf489025e71
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/io/mod.rs:1846:15
   7:     0x7ffba3b8c8a4 - std::sys_common::backtrace::_print::h00080302d23998ae
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/sys_common/backtrace.rs:47:5
   8:     0x7ffba3b8c8a4 - std::sys_common::backtrace::print::h6b23124445400245
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/sys_common/backtrace.rs:34:9
   9:     0x7ffba3b8f5eb - std::panicking::default_hook::{{closure}}::hd67b2f9d36675a28
  10:     0x7ffba3b8f339 - std::panicking::default_hook::h10a39ef11c714e42
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/panicking.rs:292:9
  11:     0x7ffba6a7a94c - std[5a8e7f94216a9138]::panicking::update_hook::<alloc[e14ab1f516d287ab]::boxed::Box<rustc_driver_impl[e279e4f1fedd9109]::install_ice_hook::{closure#0}>>::{closure#0}
  12:     0x7ffba3b8fd50 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::h37ba37dc48823c1d
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/alloc/src/boxed.rs:2030:9
  13:     0x7ffba3b8fd50 - std::panicking::rust_panic_with_hook::he3e3bc7c345bf54b
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/panicking.rs:786:13
  14:     0x7ffba6aa7524 - std[5a8e7f94216a9138]::panicking::begin_panic::<rustc_errors[34364e5c712fab73]::ExplicitBug>::{closure#0}
  15:     0x7ffba6aa4176 - std[5a8e7f94216a9138]::sys_common::backtrace::__rust_end_short_backtrace::<std[5a8e7f94216a9138]::panicking::begin_panic<rustc_errors[34364e5c712fab73]::ExplicitBug>::{closure#0}, !>
  16:     0x7ffba6a9f936 - std[5a8e7f94216a9138]::panicking::begin_panic::<rustc_errors[34364e5c712fab73]::ExplicitBug>
  17:     0x7ffba5417631 - <rustc_errors[34364e5c712fab73]::diagnostic::BugAbort as rustc_errors[34364e5c712fab73]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
  18:     0x7ffba871e027 - <rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext>::resolve_type_ref
  19:     0x7ffba51b7b52 - rustc_hir[170b9793d794ea06]::intravisit::walk_qpath::<rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext>
  20:     0x7ffba51bea74 - <rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext as rustc_hir[170b9793d794ea06]::intravisit::Visitor>::visit_path
  21:     0x7ffba858faef - <rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext>::visit_poly_trait_ref_inner
  22:     0x7ffba871c4ae - rustc_hir[170b9793d794ea06]::intravisit::walk_item::<rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext>
  23:     0x7ffba871b5b8 - <rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::BoundVarContext as rustc_hir[170b9793d794ea06]::intravisit::Visitor>::visit_item
  24:     0x7ffba858cb8a - rustc_hir_analysis[71d4294717f7f2b7]::collect::resolve_bound_vars::resolve_bound_vars
  25:     0x7ffba858c731 - rustc_query_impl[9d4c51777e2bb749]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9d4c51777e2bb749]::query_impl::resolve_bound_vars::dynamic_query::{closure#2}::{closure#0}, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 8usize]>>
  26:     0x7ffba80f6be3 - rustc_query_system[9b2ccfe41ae3bb1b]::query::plumbing::try_execute_query::<rustc_query_impl[9d4c51777e2bb749]::DynamicConfig<rustc_query_system[9b2ccfe41ae3bb1b]::query::caches::VecCache<rustc_hir[170b9793d794ea06]::hir_id::OwnerId, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[9d4c51777e2bb749]::plumbing::QueryCtxt, false>
  27:     0x7ffba80f670c - rustc_query_impl[9d4c51777e2bb749]::query_impl::resolve_bound_vars::get_query_non_incr::__rust_end_short_backtrace
  28:     0x7ffba80f62a6 - rustc_query_impl[9d4c51777e2bb749]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9d4c51777e2bb749]::query_impl::named_variable_map::dynamic_query::{closure#2}::{closure#0}, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 8usize]>>
  29:     0x7ffba80f6be3 - rustc_query_system[9b2ccfe41ae3bb1b]::query::plumbing::try_execute_query::<rustc_query_impl[9d4c51777e2bb749]::DynamicConfig<rustc_query_system[9b2ccfe41ae3bb1b]::query::caches::VecCache<rustc_hir[170b9793d794ea06]::hir_id::OwnerId, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[9d4c51777e2bb749]::plumbing::QueryCtxt, false>
  30:     0x7ffba80f664c - rustc_query_impl[9d4c51777e2bb749]::query_impl::named_variable_map::get_query_non_incr::__rust_end_short_backtrace
  31:     0x7ffba5e39cd2 - <dyn rustc_hir_analysis[71d4294717f7f2b7]::astconv::AstConv>::res_to_ty
  32:     0x7ffba801b7c0 - <dyn rustc_hir_analysis[71d4294717f7f2b7]::astconv::AstConv>::ast_ty_to_ty_inner
  33:     0x7ffba8944b44 - <dyn rustc_hir_analysis[71d4294717f7f2b7]::astconv::AstConv>::create_args_for_ast_path
  34:     0x7ffba8a71b10 - <dyn rustc_hir_analysis[71d4294717f7f2b7]::astconv::AstConv>::instantiate_poly_trait_ref
  35:     0x7ffba8a6eafc - <dyn rustc_hir_analysis[71d4294717f7f2b7]::astconv::AstConv>::compute_bounds
  36:     0x7ffba8940fa2 - rustc_hir_analysis[71d4294717f7f2b7]::collect::item_bounds::opaque_type_bounds
  37:     0x7ffba893f8f1 - rustc_hir_analysis[71d4294717f7f2b7]::collect::item_bounds::explicit_item_bounds
  38:     0x7ffba893ea67 - rustc_query_impl[9d4c51777e2bb749]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9d4c51777e2bb749]::query_impl::explicit_item_bounds::dynamic_query::{closure#2}::{closure#0}, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 16usize]>>
  39:     0x7ffba893ea31 - <rustc_query_impl[9d4c51777e2bb749]::query_impl::explicit_item_bounds::dynamic_query::{closure#2} as core[85b4fd477ce5bb21]::ops::function::FnOnce<(rustc_middle[446dd094ad85939e]::ty::context::TyCtxt, rustc_span[adb133ac03280fc1]::def_id::DefId)>>::call_once
  40:     0x7ffba8158a40 - rustc_query_system[9b2ccfe41ae3bb1b]::query::plumbing::try_execute_query::<rustc_query_impl[9d4c51777e2bb749]::DynamicConfig<rustc_query_system[9b2ccfe41ae3bb1b]::query::caches::DefIdCache<rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 16usize]>>, false, false, false>, rustc_query_impl[9d4c51777e2bb749]::plumbing::QueryCtxt, false>
  41:     0x7ffba8157121 - rustc_query_impl[9d4c51777e2bb749]::query_impl::explicit_item_bounds::get_query_non_incr::__rust_end_short_backtrace
  42:     0x7ffba81f4c6a - <rustc_hir_analysis[71d4294717f7f2b7]::collect::CollectItemTypesVisitor as rustc_hir[170b9793d794ea06]::intravisit::Visitor>::visit_item
  43:     0x7ffba81f3176 - rustc_hir_analysis[71d4294717f7f2b7]::collect::collect_mod_item_types
  44:     0x7ffba81f3109 - rustc_query_impl[9d4c51777e2bb749]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9d4c51777e2bb749]::query_impl::collect_mod_item_types::dynamic_query::{closure#2}::{closure#0}, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 0usize]>>
  45:     0x7ffba8a2b2ed - rustc_query_system[9b2ccfe41ae3bb1b]::query::plumbing::try_execute_query::<rustc_query_impl[9d4c51777e2bb749]::DynamicConfig<rustc_query_system[9b2ccfe41ae3bb1b]::query::caches::DefaultCache<rustc_span[adb133ac03280fc1]::def_id::LocalModDefId, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 0usize]>>, false, false, false>, rustc_query_impl[9d4c51777e2bb749]::plumbing::QueryCtxt, false>
  46:     0x7ffba8a2ae17 - rustc_query_impl[9d4c51777e2bb749]::query_impl::collect_mod_item_types::get_query_non_incr::__rust_end_short_backtrace
  47:     0x7ffba87ad4e8 - rustc_hir_analysis[71d4294717f7f2b7]::check_crate
  48:     0x7ffba88a2dd3 - rustc_interface[7ca501d7f8f3a34f]::passes::analysis
  49:     0x7ffba88a2a29 - rustc_query_impl[9d4c51777e2bb749]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[9d4c51777e2bb749]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 1usize]>>
  50:     0x7ffba8b3d4a5 - rustc_query_system[9b2ccfe41ae3bb1b]::query::plumbing::try_execute_query::<rustc_query_impl[9d4c51777e2bb749]::DynamicConfig<rustc_query_system[9b2ccfe41ae3bb1b]::query::caches::SingleCache<rustc_middle[446dd094ad85939e]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[9d4c51777e2bb749]::plumbing::QueryCtxt, false>
  51:     0x7ffba8b3d209 - rustc_query_impl[9d4c51777e2bb749]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  52:     0x7ffba8b4c719 - rustc_interface[7ca501d7f8f3a34f]::interface::run_compiler::<core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>, rustc_driver_impl[e279e4f1fedd9109]::run_compiler::{closure#0}>::{closure#0}
  53:     0x7ffba8dbe705 - std[5a8e7f94216a9138]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[7ca501d7f8f3a34f]::util::run_in_thread_with_globals<rustc_interface[7ca501d7f8f3a34f]::util::run_in_thread_pool_with_globals<rustc_interface[7ca501d7f8f3a34f]::interface::run_compiler<core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>, rustc_driver_impl[e279e4f1fedd9109]::run_compiler::{closure#0}>::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>
  54:     0x7ffba8dbe532 - <<std[5a8e7f94216a9138]::thread::Builder>::spawn_unchecked_<rustc_interface[7ca501d7f8f3a34f]::util::run_in_thread_with_globals<rustc_interface[7ca501d7f8f3a34f]::util::run_in_thread_pool_with_globals<rustc_interface[7ca501d7f8f3a34f]::interface::run_compiler<core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>, rustc_driver_impl[e279e4f1fedd9109]::run_compiler::{closure#0}>::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[85b4fd477ce5bb21]::result::Result<(), rustc_span[adb133ac03280fc1]::ErrorGuaranteed>>::{closure#1} as core[85b4fd477ce5bb21]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  55:     0x7ffba3b99725 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h1bff3efb61c3fa6b
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/alloc/src/boxed.rs:2016:9
  56:     0x7ffba3b99725 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h83141cf549dced8a
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/alloc/src/boxed.rs:2016:9
  57:     0x7ffba3b99725 - std::sys::pal::unix::thread::Thread::new::thread_start::hbe9287fdd7c325bc
                               at /rustc/f8131a48a46ac3bc8a3d0fe0477055b132cffdc3/library/std/src/sys/pal/unix/thread.rs:108:17
  58:     0x7ffba39819eb - <unknown>
  59:     0x7ffba3a057cc - <unknown>
  60:                0x0 - <unknown>

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 1.78.0-nightly (f8131a48a 2024-02-21) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [resolve_bound_vars] resolving lifetimes
#1 [named_variable_map] looking up a named region
#2 [explicit_item_bounds] finding item bounds for `produce::{opaque#0}::{opaque#0}`
#3 [collect_mod_item_types] collecting item types in top-level module
#4 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 3 previous errors; 1 warning emitted

Some errors have detailed explanations: E0220, E0601.
For more information about an error, try `rustc --explain E0220`.

[matthiaskrgr]

Regression in nightly-2023-02-18

fetching (via remote github) commits from max(9a7cc6c, 2023-02-15) to 9aa5c24
ending github query because we found starting sha: 9a7cc6c
get_commits_between returning commits, len: 8
commit[0] 2023-02-16: Auto merge of #108127 - matthiaskrgr:rollup-kpzfc6j, r=matthiaskrgr
commit[1] 2023-02-16: Auto merge of #107833 - Zoxc:arena-query-clean, r=cjgillot
commit[2] 2023-02-17: Auto merge of #108145 - matthiaskrgr:rollup-bgadak1, r=matthiaskrgr
commit[3] 2023-02-17: Auto merge of #107753 - kylematsuda:type-of, r=BoxyUwU
commit[4] 2023-02-17: Auto merge of #108058 - Zoxc:query-ctxtx-byval, r=cjgillot
commit[5] 2023-02-17: Auto merge of #107965 - BoxyUwU:add_const_arg_has_type_predicate, r=compiler-errors
commit[6] 2023-02-17: Auto merge of #108159 - matthiaskrgr:rollup-5k2j7cx, r=matthiaskrgr
commit[7] 2023-02-17: Auto merge of #108075 - WaffleLapkin:de-arena-allocates-you-OwO, r=Nilstrieb
ERROR: no CI builds available between 9a7cc6c and 9aa5c24 within last 167 days