theemathas
commented
5 months ago ICEs on nightly and beta, but not on stable.
Minimized further:
struct Thing;
// Invariant in 'a, Covariant in 'b
struct TwoThings<'a, 'b>(*mut &'a (), &'b mut ());
impl Thing {
fn enter_scope<'a>(self, _scope: impl for<'b> FnOnce(TwoThings<'a, 'b>)) {}
}
fn foo() {
Thing.enter_scope(|ctx| {
SameLifetime(ctx);
});
}
struct SameLifetime<'a>(TwoThings<'a, 'a>);
lqd
estebank
auto-reduced (treereduce-rust):
original:
Version information
Command:
/home/matthias/.rustup/toolchains/master/bin/rustcProgram output
``` error[E0407]: method `foo` is not a member of trait `Foo` --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:11:5 | 11 | / fn foo(&mut self) { 12 | | self.enter_scope(|ctx| { 13 | | BarImpl(ctx); 14 | | }); 15 | | } | |_____^ not a member of trait `Foo` error[E0601]: `main` function not found in crate `mvce` --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:22:66 | 22 | pub struct BarImpl<'a, 'b, T: Trait>(&'b mut FooImpl<'a, 'b, T>); | ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs` error[E0392]: lifetime parameter `'a` is never used --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:5:20 | 5 | pub struct FooImpl<'a, 'b, A: Trait>(); | ^^ unused lifetime parameter | = help: consider removing `'a`, referring to it in a field, or using a marker such as `PhantomData` error[E0392]: lifetime parameter `'b` is never used --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:5:24 | 5 | pub struct FooImpl<'a, 'b, A: Trait>(); | ^^ unused lifetime parameter | = help: consider removing `'b`, referring to it in a field, or using a marker such as `PhantomData` error[E0392]: type parameter `A` is never used --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:5:28 | 5 | pub struct FooImpl<'a, 'b, A: Trait>(); | ^ unused type parameter | = help: consider removing `A`, referring to it in a field, or using a marker such as `PhantomData` error[E0277]: the trait bound `T: Trait` is not satisfied --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:18:17 | 18 | impl<'a, 'b, T> FooImpl<'a, 'b, T> { | ^^^^^^^^^^^^^^^^^^ the trait `Trait` is not implemented for `T` | note: required by a bound in `FooImpl` --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:5:31 | 5 | pub struct FooImpl<'a, 'b, A: Trait>(); | ^^^^^ required by this bound in `FooImpl` help: consider restricting type parameter `T` | 18 | impl<'a, 'b, T: Trait> FooImpl<'a, 'b, T> { | +++++++ error[E0277]: the trait bound `T: Trait` is not satisfied --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:19:25 | 19 | fn enter_scope(&mut self, _scope: impl FnOnce(&mut Self)) {} | ^^^^ the trait `Trait` is not implemented for `T` | note: required by a bound in `FooImpl` --> /tmp/icemaker_global_tempdir.KlSl3E2oW0vz/rustc_testrunner_tmpdir_reporting.P1izYYvalAKk/mvce.rs:5:31 | 5 | pub struct FooImpl<'a, 'b, A: Trait>(); | ^^^^^ required by this bound in `FooImpl` help: consider restricting type parameter `T` | 18 | impl<'a, 'b, T: Trait> FooImpl<'a, 'b, T> { | +++++++ thread 'rustc' panicked at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/compiler/rustc_type_ir/src/binder.rs:767:9: expected region for `'a/#0` ('a/#0/0) but found Type(&'{erased} mut FooImpl<'{erased}, '{erased}, T/#2>) when instantiating args=[&'{erased} mut FooImpl<'{erased}, '{erased}, T/#2>, '?27, ?2t, Closure(DefId(0:15 ~ mvce[be9b]::{impl#0}::foo::{closure#0}), ['{erased}, '{erased}, T/#2, i32, Binder(fn((&ReLateParam(DefId(0:15 ~ mvce[be9b]::{impl#0}::foo::{closure#0}), BrAnon) mut FooImpl<'{erased}, '{erased}, T/#2>,)), []), ()])] stack backtrace: 0: 0x7d9da1f2f155 - std::backtrace_rs::backtrace::libunwind::trace::h5b7cf4bba7cac765 at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/../../backtrace/src/backtrace/libunwind.rs:105:5 1: 0x7d9da1f2f155 - std::backtrace_rs::backtrace::trace_unsynchronized::h93d323f41bd15d1a at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5 2: 0x7d9da1f2f155 - std::sys_common::backtrace::_print_fmt::h3327b2f571b0be87 at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys_common/backtrace.rs:68:5 3: 0x7d9da1f2f155 -::fmt::h7601f667b7cd036b
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7d9da1f7e35b - core::fmt::rt::Argument::fmt::h6068c660b6aa14dd
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/core/src/fmt/rt.rs:165:63
5: 0x7d9da1f7e35b - core::fmt::write::h8c83b3d9ccbd9ab0
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/core/src/fmt/mod.rs:1168:21
6: 0x7d9da1f23edf - std::io::Write::write_fmt::hfb2780d9da85c05d
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/io/mod.rs:1835:15
7: 0x7d9da1f2ef2e - std::sys_common::backtrace::_print::h80d192fe8bc7b210
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7d9da1f2ef2e - std::sys_common::backtrace::print::h97add2d0adf881c5
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7d9da1f31959 - std::panicking::default_hook::{{closure}}::h3bbae185248f1032
10: 0x7d9da1f316fa - std::panicking::default_hook::h96b25b039d746565
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/panicking.rs:298:9
11: 0x7d9d9e76f7ef - std[af357a8947fa518]::panicking::update_hook::>::{closure#0}
12: 0x7d9da1f3208b - as core::ops::function::Fn>::call::h3d83d6b97897f1f2
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/alloc/src/boxed.rs:2077:9
13: 0x7d9da1f3208b - std::panicking::rust_panic_with_hook::h90a1236ac52f9cb8
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/panicking.rs:799:13
14: 0x7d9da1f31e04 - std::panicking::begin_panic_handler::{{closure}}::he243a5a4218c0c12
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/panicking.rs:664:13
15: 0x7d9da1f2f619 - std::sys_common::backtrace::__rust_end_short_backtrace::h5456a2cc5922b392
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys_common/backtrace.rs:171:18
16: 0x7d9da1f31b37 - rust_begin_unwind
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/panicking.rs:652:5
17: 0x7d9da1f7a8f3 - core::panicking::panic_fmt::h9de1aab48df80296
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/core/src/panicking.rs:72:14
18: 0x7d9d9ec080a5 - >::region_param_expected
19: 0x7d9d9fc2b514 - as rustc_type_ir[69ca3d0c615e5edb]::fold::TypeFolder>::fold_ty
20: 0x7d9d9fc289a9 - as rustc_type_ir[69ca3d0c615e5edb]::fold::TypeFolder>::fold_ty
21: 0x7d9d9fc29356 - as rustc_type_ir[69ca3d0c615e5edb]::fold::TypeFolder>::fold_ty
22: 0x7d9d9fc24ee8 - ::instantiate_into
23: 0x7d9d9c773eb4 - ::instantiate
24: 0x7d9d9e56f22d - ::report_general_error
25: 0x7d9d9e56c1d1 - ::report_region_error
26: 0x7d9da0abcfff - rustc_borrowck[2500609bed9f9c52]::do_mir_borrowck
27: 0x7d9da0a8747e - rustc_query_impl[943312b0e79324d1]::plumbing::__rust_begin_short_backtrace::>
28: 0x7d9d9fd92eee - rustc_query_system[a59b298ec6d15034]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[943312b0e79324d1]::plumbing::QueryCtxt, false>
29: 0x7d9d9fd9294d - rustc_query_impl[943312b0e79324d1]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
30: 0x7d9d9fef60a0 - rustc_middle[7c70eefbce8d2529]::query::plumbing::query_get_at::>>
31: 0x7d9d9fef610e - ::prove_closure_bounds
32: 0x7d9d9ff281ce - ::typeck_mir
33: 0x7d9d9d0ed647 - rustc_borrowck[2500609bed9f9c52]::type_check::type_check
34: 0x7d9d9d0a5bb2 - rustc_borrowck[2500609bed9f9c52]::nll::compute_regions
35: 0x7d9da0a94ea5 - rustc_borrowck[2500609bed9f9c52]::do_mir_borrowck
36: 0x7d9da0a8747e - rustc_query_impl[943312b0e79324d1]::plumbing::__rust_begin_short_backtrace::>
37: 0x7d9d9fd92eee - rustc_query_system[a59b298ec6d15034]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[943312b0e79324d1]::plumbing::QueryCtxt, false>
38: 0x7d9d9fd9294d - rustc_query_impl[943312b0e79324d1]::query_impl::mir_borrowck::get_query_non_incr::__rust_end_short_backtrace
39: 0x7d9da05790c4 - rustc_interface[e5ccd3756d67c002]::passes::analysis
40: 0x7d9da057825b - rustc_query_impl[943312b0e79324d1]::plumbing::__rust_begin_short_backtrace::>
41: 0x7d9da092b125 - rustc_query_system[a59b298ec6d15034]::query::plumbing::try_execute_query::>, false, false, false>, rustc_query_impl[943312b0e79324d1]::plumbing::QueryCtxt, false>
42: 0x7d9da092ae8f - rustc_query_impl[943312b0e79324d1]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
43: 0x7d9da0785b4e - rustc_interface[e5ccd3756d67c002]::interface::run_compiler::, rustc_driver_impl[dce87f3633bd6d3]::run_compiler::{closure#0}>::{closure#1}
44: 0x7d9da0770367 - std[af357a8947fa518]::sys_common::backtrace::__rust_begin_short_backtrace::, rustc_driver_impl[dce87f3633bd6d3]::run_compiler::{closure#0}>::{closure#1}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>::{closure#0}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>
45: 0x7d9da077012a - <::spawn_unchecked_, rustc_driver_impl[dce87f3633bd6d3]::run_compiler::{closure#0}>::{closure#1}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>::{closure#0}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[bfd5ce68dc337bd2]::result::Result<(), rustc_span[6885e0588e8c2141]::ErrorGuaranteed>>::{closure#2} as core[bfd5ce68dc337bd2]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
46: 0x7d9da1f3beeb - as core::ops::function::FnOnce>::call_once::he367ea009ea8ba63
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/alloc/src/boxed.rs:2063:9
47: 0x7d9da1f3beeb - as core::ops::function::FnOnce>::call_once::h0de3b38223e24e0c
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/alloc/src/boxed.rs:2063:9
48: 0x7d9da1f3beeb - std::sys::pal::unix::thread::Thread::new::thread_start::h470ec391a583e39e
at /rustc/f6e4703e91eedcc5e33ad2cf3f6c0d034782f245/library/std/src/sys/pal/unix/thread.rs:108:17
49: 0x7d9d9b4aa1cf -
50: 0x7d9d9b52b6ec -
51: 0x0 -
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: please make sure that you have updated to the latest nightly
note: rustc 1.80.0-nightly (f6e4703e9 2024-05-27) running on x86_64-unknown-linux-gnu
query stack during panic:
#0 [mir_borrowck] borrow-checking `::foo::{closure#0}`
#1 [mir_borrowck] borrow-checking `::foo`
end of query stack
error: aborting due to 7 previous errors
Some errors have detailed explanations: E0277, E0392, E0407, E0601.
For more information about an error, try `rustc --explain E0277`.
```