Closed as not planned
Description
auto-reduced (treereduce-rust):
#![feature(generic_associated_types_extended)]
fn make_static<'a, 'b, T: ?Sized>(x: &'a T) -> &'b T {
trait A<T>: B<T = T> {}
trait B {
type Y<const N: i16>;
}
struct Erase<T: ?Sized + B>(T::T);
Erase::<dyn for<'c> A<&'c T>>(Waker::noop()).0
}original:
fn make_static<'a, 'b, T: ?Sized>(x: &'a T) -> &'b T {
trait A<T>: B<T = T> {}
trait B {
type Y<const N: i16>;
}
struct Erase<T: ?Sized + B>(T::T);
Erase::<dyn for<'c> A<&'c T>>(Waker::noop()).0
}
fn main() {
let s = {
make_static(String::from("hello").as_str())
};
for example_member in EXAMPLE_MAP {
(example_member.member2)(&port);
}
}Version information
rustc 1.83.0-nightly (36780360b 2024-10-13)
binary: rustc
commit-hash: 36780360b62320a61e2234b17ec600e8e4785509
commit-date: 2024-10-13
host: x86_64-unknown-linux-gnu
release: 1.83.0-nightly
LLVM version: 19.1.1
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zcrate-attr=feature(generic_associated_types_extended)
Program output
error[E0433]: failed to resolve: use of undeclared type `Waker`
--> /tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs:10:35
|
10 | Erase::<dyn for<'c> A<&'c T>>(Waker::noop()).0
| ^^^^^ use of undeclared type `Waker`
|
help: consider importing this struct
|
1 + use std::task::Waker;
|
warning: the feature `generic_associated_types_extended` is incomplete and may not be safe to use and/or cause compiler crashes
--> <crate attribute>:1:9
|
1 | feature(generic_associated_types_extended)
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #95451 <https://github.com/rust-lang/rust/issues/95451> for more information
= note: `#[warn(incomplete_features)]` on by default
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs:11:2
|
11 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs`
error[E0220]: associated type `T` not found for `B`
--> /tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs:2:19
|
2 | trait A<T>: B<T = T> {}
| ^ help: there is an associated type with a similar name: `Y`
error[E0220]: associated type `T` not found for `T`
--> /tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs:8:36
|
8 | struct Erase<T: ?Sized + B>(T::T);
| ^ there is a similarly named associated type `Y` in the trait `B`
|
help: change the associated type name to use `Y` from `B`
|
8 | struct Erase<T: ?Sized + B>(T::Y);
| ~
error[E0191]: the value of the associated type `Y` in `B` must be specified
--> /tmp/icemaker_global_tempdir.IaSg5fALVGp5/rustc_testrunner_tmpdir_reporting.lckb7GfbLyNa/mvce.rs:10:17
|
5 | type Y<const N: i16>;
| -------------------- `Y` defined here
...
10 | Erase::<dyn for<'c> A<&'c T>>(Waker::noop()).0
| ^^^^^^^^^^^^^^^^ help: specify the associated type: `for<'c> A<&'c T, Y = Type>`
error: internal compiler error: compiler/rustc_infer/src/infer/freshen.rs:178:17: unexpected const ^0
thread 'rustc' panicked at compiler/rustc_infer/src/infer/freshen.rs:178:17:
Box<dyn Any>
stack backtrace:
0: 0x778ff8bd55ca - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hf200c11c9fce97cd
1: 0x778ff94034a6 - core::fmt::write::h44e2a25b26982225
2: 0x778ffa600991 - std::io::Write::write_fmt::h9aae7daacab8c281
3: 0x778ff8bd5422 - std::sys::backtrace::BacktraceLock::print::hbde90d84d6c34a2f
4: 0x778ff8bd78f6 - std::panicking::default_hook::{{closure}}::h5f9a7466f6d55fa4
5: 0x778ff8bd7740 - std::panicking::default_hook::h889bcdd61427cfea
6: 0x778ff7c2ccbf - std[dad1c9cd4209e29f]::panicking::update_hook::<alloc[b36bac19b723d86a]::boxed::Box<rustc_driver_impl[b4430c9a2ffdc2d8]::install_ice_hook::{closure#0}>>::{closure#0}
7: 0x778ff8bd8008 - std::panicking::rust_panic_with_hook::h24c51a3a03576cce
8: 0x778ff7c66681 - std[dad1c9cd4209e29f]::panicking::begin_panic::<rustc_errors[44cef3b94fe7d510]::ExplicitBug>::{closure#0}
9: 0x778ff7c59726 - std[dad1c9cd4209e29f]::sys::backtrace::__rust_end_short_backtrace::<std[dad1c9cd4209e29f]::panicking::begin_panic<rustc_errors[44cef3b94fe7d510]::ExplicitBug>::{closure#0}, !>
10: 0x778ff7c596ee - std[dad1c9cd4209e29f]::panicking::begin_panic::<rustc_errors[44cef3b94fe7d510]::ExplicitBug>
11: 0x778ff7c6fdd1 - <rustc_errors[44cef3b94fe7d510]::diagnostic::BugAbort as rustc_errors[44cef3b94fe7d510]::diagnostic::EmissionGuarantee>::emit_producing_guarantee
12: 0x778ff82cb414 - rustc_middle[f935b324f13658c5]::util::bug::opt_span_bug_fmt::<rustc_span[2f3a5b6ef5575c7c]::span_encoding::Span>::{closure#0}
13: 0x778ff82b139a - rustc_middle[f935b324f13658c5]::ty::context::tls::with_opt::<rustc_middle[f935b324f13658c5]::util::bug::opt_span_bug_fmt<rustc_span[2f3a5b6ef5575c7c]::span_encoding::Span>::{closure#0}, !>::{closure#0}
14: 0x778ff82b122b - rustc_middle[f935b324f13658c5]::ty::context::tls::with_context_opt::<rustc_middle[f935b324f13658c5]::ty::context::tls::with_opt<rustc_middle[f935b324f13658c5]::util::bug::opt_span_bug_fmt<rustc_span[2f3a5b6ef5575c7c]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
15: 0x778ff5816d20 - rustc_middle[f935b324f13658c5]::util::bug::bug_fmt
16: 0x778ffa173e3b - <rustc_infer[7d93aa896a2a41a3]::infer::freshen::TypeFreshener as rustc_type_ir[70a71db6b5d2d52b]::fold::TypeFolder<rustc_middle[f935b324f13658c5]::ty::context::TyCtxt>>::fold_const
17: 0x778ff9538808 - <rustc_middle[f935b324f13658c5]::ty::Ty as rustc_type_ir[70a71db6b5d2d52b]::fold::TypeSuperFoldable<rustc_middle[f935b324f13658c5]::ty::context::TyCtxt>>::try_super_fold_with::<rustc_infer[7d93aa896a2a41a3]::infer::freshen::TypeFreshener>
18: 0x778ffa094e1f - <rustc_trait_selection[1966c28e1c67d278]::traits::select::SelectionContext>::poly_select::{closure#0}
19: 0x778ff592134d - <rustc_trait_selection[1966c28e1c67d278]::traits::fulfill::FulfillProcessor>::process_trait_obligation
20: 0x778ff58e66f5 - <rustc_trait_selection[1966c28e1c67d278]::traits::fulfill::FulfillProcessor as rustc_data_structures[4ff922b557bd2789]::obligation_forest::ObligationProcessor>::process_obligation
21: 0x778ff940f152 - <rustc_data_structures[4ff922b557bd2789]::obligation_forest::ObligationForest<rustc_trait_selection[1966c28e1c67d278]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[1966c28e1c67d278]::traits::fulfill::FulfillProcessor>
22: 0x778ff5b74f14 - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::confirm_builtin_call
23: 0x778ffa067174 - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
24: 0x778ff94bfc8b - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::check_field
25: 0x778ffa06879f - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
26: 0x778ffa06090a - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::check_block_with_expected
27: 0x778ffa067aa3 - <rustc_hir_typeck[968d3c965f96f2db]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
28: 0x778ff9cef066 - rustc_hir_typeck[968d3c965f96f2db]::check::check_fn
29: 0x778ff9ce3e8b - rustc_hir_typeck[968d3c965f96f2db]::typeck
30: 0x778ff9ce3807 - rustc_query_impl[d805d7aa85f0ab3c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d805d7aa85f0ab3c]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f935b324f13658c5]::query::erase::Erased<[u8; 8usize]>>
31: 0x778ff986507a - rustc_query_system[d9c2e7afa5df5fa1]::query::plumbing::try_execute_query::<rustc_query_impl[d805d7aa85f0ab3c]::DynamicConfig<rustc_query_system[d9c2e7afa5df5fa1]::query::caches::VecCache<rustc_span[2f3a5b6ef5575c7c]::def_id::LocalDefId, rustc_middle[f935b324f13658c5]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[d805d7aa85f0ab3c]::plumbing::QueryCtxt, false>
32: 0x778ff9863ddb - rustc_query_impl[d805d7aa85f0ab3c]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
33: 0x778ff9863a61 - <rustc_middle[f935b324f13658c5]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[9224370b9464c813]::check_crate::{closure#4}>::{closure#0}
34: 0x778ff986199b - rustc_hir_analysis[9224370b9464c813]::check_crate
35: 0x778ff985e3d7 - rustc_interface[2d1024fbde9086d5]::passes::run_required_analyses
36: 0x778ffa28585e - rustc_interface[2d1024fbde9086d5]::passes::analysis
37: 0x778ffa285831 - rustc_query_impl[d805d7aa85f0ab3c]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[d805d7aa85f0ab3c]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[f935b324f13658c5]::query::erase::Erased<[u8; 1usize]>>
38: 0x778ffa2c76ee - rustc_query_system[d9c2e7afa5df5fa1]::query::plumbing::try_execute_query::<rustc_query_impl[d805d7aa85f0ab3c]::DynamicConfig<rustc_query_system[d9c2e7afa5df5fa1]::query::caches::SingleCache<rustc_middle[f935b324f13658c5]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[d805d7aa85f0ab3c]::plumbing::QueryCtxt, false>
39: 0x778ffa2c73cf - rustc_query_impl[d805d7aa85f0ab3c]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
40: 0x778ffa169fdb - rustc_interface[2d1024fbde9086d5]::interface::run_compiler::<core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>, rustc_driver_impl[b4430c9a2ffdc2d8]::run_compiler::{closure#0}>::{closure#1}
41: 0x778ffa248814 - std[dad1c9cd4209e29f]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[2d1024fbde9086d5]::util::run_in_thread_with_globals<rustc_interface[2d1024fbde9086d5]::util::run_in_thread_pool_with_globals<rustc_interface[2d1024fbde9086d5]::interface::run_compiler<core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>, rustc_driver_impl[b4430c9a2ffdc2d8]::run_compiler::{closure#0}>::{closure#1}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>::{closure#0}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>
42: 0x778ffa248c28 - <<std[dad1c9cd4209e29f]::thread::Builder>::spawn_unchecked_<rustc_interface[2d1024fbde9086d5]::util::run_in_thread_with_globals<rustc_interface[2d1024fbde9086d5]::util::run_in_thread_pool_with_globals<rustc_interface[2d1024fbde9086d5]::interface::run_compiler<core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>, rustc_driver_impl[b4430c9a2ffdc2d8]::run_compiler::{closure#0}>::{closure#1}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>::{closure#0}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[cecbbef79298d09e]::result::Result<(), rustc_span[2f3a5b6ef5575c7c]::ErrorGuaranteed>>::{closure#1} as core[cecbbef79298d09e]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
43: 0x778ffa2496eb - std::sys::pal::unix::thread::Thread::new::thread_start::he87f3e0d5f9c1b15
44: 0x778ffb95739d - <unknown>
45: 0x778ffb9dc49c - <unknown>
46: 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: please make sure that you have updated to the latest nightly
note: rustc 1.83.0-nightly (36780360b 2024-10-13) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z crate-attr=feature(generic_associated_types_extended) -Z dump-mir-dir=dir
query stack during panic:
#0 [typeck] type-checking `make_static`
#1 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 6 previous errors; 1 warning emitted
Some errors have detailed explanations: E0191, E0220, E0433, E0601.
For more information about an error, try `rustc --explain E0191`.
@rustbot label +F-generic_associated_types_extended