Closed
Description
auto-reduced (treereduce-rust):
type WithLifetime<T> = impl Equals<>;
fn _defining_use<T>() -> WithLifetime<T> {}
trait Convert<'a> {
fn convert<'b, T: ?Sized>(, x: &'a T) -> &'b T;
}
fn extend_lifetime<'a, 'b, T: ?Sized>(x: &'a T) -> &'b T {
WithLifetime::<&'a ()>::convert_helper::<(), T>(&(), x)
}
trait Equals {
fn convert_helper<'a, 'b, W: , T: ?Sized>(
,
,
) -> &'b T;
}
impl<S> Equals for S {
fn convert_helper<'foo, 'b, W: Convert<'a, >, T: ?Sized>(
proof: &'b Self,
x: &'a T,
) -> &'b T {
W::convert(proof, x)
}
}
original code
original:
#![feature(type_alias_impl_trait)]
type WithLifetime<T> = impl Equals<SelfType = ()>;
fn _defining_use<T>() -> WithLifetime<T> {}
trait Convert<'a> {
type Witness;
fn convert<'b, T: ?Sized>(_proof: &'b Self::Witness, x: &'a T) -> &'b T;
}
impl<'a> Convert<'a> for () {
type Witness = WithLifetime<&'a ()>;
fn convert<'b, T: ?Sized>(_proof: &'b WithLifetime<&'a ()>, x: &'a T) -> &'b T {
// compiler used to think it gets to assume 'a: 'b here because
// of the `&'b WithLifetime<&'a ()>` argument
x
//~^ ERROR lifetime may not live long enough
}
}
fn extend_lifetime<'a, 'b, T: ?Sized>(x: &'a T) -> &'b T {
WithLifetime::<&'a ()>::convert_helper::<(), T>(&(), x)
}
trait Equals {
type SelfType;
fn convert_helper<'a, 'b, W: Convert<'a, Witness = Self>, T: ?Sized>(
proof: &'b Self::SelfType,
x: &'a T,
) -> &'b T;
}
impl<S> Equals for S {
type SelfType = Self;
fn convert_helper<'foo, 'b, W: Convert<'a, Witness = Self>, T: ?Sized>(
proof: &'b Self,
x: &'a T,
) -> &'b T {
W::convert(proof, x)
}
}
fn main() {
let r;
{
let x = String::from("Hello World?");
r = extend_lifetime(&x);
}
println!("{}", r);
}Version information
rustc 1.78.0-nightly (af88f7db5 2024-02-08)
binary: rustc
commit-hash: af88f7db51f6f2a1472f9279d7c7e7c822afff77
commit-date: 2024-02-08
host: x86_64-unknown-linux-gnu
release: 1.78.0-nightly
LLVM version: 17.0.6
Command:
/home/matthias/.rustup/toolchains/master/bin/rustc -Zpolymorphize=on -Zinline-mir=yes
Program output
error: expected argument name, found `,`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:8:31
|
8 | fn convert<'b, T: ?Sized>(, x: &'a T) -> &'b T;
| ^ expected argument name
error: expected argument name, found `,`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:20:9
|
20 | ,
| ^ expected argument name
error: expected argument name, found `,`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:21:9
|
21 | ,
| ^ expected argument name
error[E0261]: use of undeclared lifetime name `'a`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:27:44
|
27 | fn convert_helper<'foo, 'b, W: Convert<'a, >, T: ?Sized>(
| ^^ undeclared lifetime
|
= note: for more information on higher-ranked polymorphism, visit https://doc.rust-lang.org/nomicon/hrtb.html
help: consider making the bound lifetime-generic with a new `'a` lifetime
|
27 | fn convert_helper<'foo, 'b, W: for<'a> Convert<'a, >, T: ?Sized>(
| +++++++
help: consider introducing lifetime `'a` here
|
27 | fn convert_helper<'a, 'foo, 'b, W: Convert<'a, >, T: ?Sized>(
| +++
help: consider introducing lifetime `'a` here
|
25 | impl<'a, S> Equals for S {
| +++
error[E0261]: use of undeclared lifetime name `'a`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:29:13
|
29 | x: &'a T,
| ^^ undeclared lifetime
|
help: consider introducing lifetime `'a` here
|
27 | fn convert_helper<'a, 'foo, 'b, W: Convert<'a, >, T: ?Sized>(
| +++
help: consider introducing lifetime `'a` here
|
25 | impl<'a, S> Equals for S {
| +++
error[E0658]: `impl Trait` in type aliases is unstable
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:3:24
|
3 | type WithLifetime<T> = impl Equals<>;
| ^^^^^^^^^^^^^
|
= note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
= help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable
= note: this compiler was built on 2024-02-08; consider upgrading it if it is out of date
warning: anonymous parameters are deprecated and will be removed in the next edition
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:8:30
|
8 | fn convert<'b, T: ?Sized>(, x: &'a T) -> &'b T;
| ^ help: try naming the parameter or explicitly ignoring it: `_: (`
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
= note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
= note: `#[warn(anonymous_parameters)]` on by default
warning: anonymous parameters are deprecated and will be removed in the next edition
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:19:46
|
19 | fn convert_helper<'a, 'b, W: , T: ?Sized>(
| ^ help: try naming the parameter or explicitly ignoring it: `_: (`
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2018!
= note: for more information, see issue #41686 <https://github.com/rust-lang/rust/issues/41686>
error[E0601]: `main` function not found in crate `mvce`
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:33:2
|
33 | }
| ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs`
error[E0195]: lifetime parameters or bounds on method `convert_helper` do not match the trait declaration
--> /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:27:22
|
19 | fn convert_helper<'a, 'b, W: , T: ?Sized>(
| ------------------------ lifetimes in impl do not match this method in trait
...
27 | fn convert_helper<'foo, 'b, W: Convert<'a, >, T: ?Sized>(
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ lifetimes do not match method in trait
error: internal compiler error: compiler/rustc_middle/src/ty/generic_args.rs:915:9: expected type for `W/#1` (W/#1/1) but found Lifetime(ReErased) when substituting, args=[(), ReErased, (), T/#1]
thread 'rustc' panicked at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/compiler/rustc_errors/src/lib.rs:922:30:
Box<dyn Any>
stack backtrace:
0: 0x7faf1c58bdd6 - std::backtrace_rs::backtrace::libunwind::trace::hf92ca961e56825b0
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/../../backtrace/src/backtrace/libunwind.rs:104:5
1: 0x7faf1c58bdd6 - std::backtrace_rs::backtrace::trace_unsynchronized::h23f341cc1a6c507f
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/../../backtrace/src/backtrace/mod.rs:66:5
2: 0x7faf1c58bdd6 - std::sys_common::backtrace::_print_fmt::ha5a5ba44893edc7f
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:68:5
3: 0x7faf1c58bdd6 - <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt::h667e6ba5a1d3724e
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:44:22
4: 0x7faf1c5de830 - core::fmt::rt::Argument::fmt::h06c91f49bef095fb
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/core/src/fmt/rt.rs:142:9
5: 0x7faf1c5de830 - core::fmt::write::h8e4b31b0aa81d13f
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/core/src/fmt/mod.rs:1120:17
6: 0x7faf1c57f64f - std::io::Write::write_fmt::h4c479f5c53dfe78c
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/io/mod.rs:1854:15
7: 0x7faf1c58bbb4 - std::sys_common::backtrace::_print::he414f5864df55ed1
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:47:5
8: 0x7faf1c58bbb4 - std::sys_common::backtrace::print::h939e58bdcc61d57d
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys_common/backtrace.rs:34:9
9: 0x7faf1c58e947 - std::panicking::default_hook::{{closure}}::h244e48e05cd664b2
10: 0x7faf1c58e6a9 - std::panicking::default_hook::hf842080c39497dac
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/panicking.rs:292:9
11: 0x7faf1f3454ac - std[f801e042bca9681]::panicking::update_hook::<alloc[1377227f5558ef79]::boxed::Box<rustc_driver_impl[65af58b05c4f91ef]::install_ice_hook::{closure#0}>>::{closure#0}
12: 0x7faf1c58f096 - <alloc::boxed::Box<F,A> as core::ops::function::Fn<Args>>::call::hee9c09a26ce84f59
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2029:9
13: 0x7faf1c58f096 - std::panicking::rust_panic_with_hook::h83c20f9191a2a712
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/panicking.rs:785:13
14: 0x7faf1f376f04 - std[f801e042bca9681]::panicking::begin_panic::<rustc_errors[89ec94d63507ad05]::ExplicitBug>::{closure#0}
15: 0x7faf1f3735f6 - std[f801e042bca9681]::sys_common::backtrace::__rust_end_short_backtrace::<std[f801e042bca9681]::panicking::begin_panic<rustc_errors[89ec94d63507ad05]::ExplicitBug>::{closure#0}, !>
16: 0x7faf1f36ea66 - std[f801e042bca9681]::panicking::begin_panic::<rustc_errors[89ec94d63507ad05]::ExplicitBug>
17: 0x7faf1f382b61 - <rustc_errors[89ec94d63507ad05]::diagnostic_builder::BugAbort as rustc_errors[89ec94d63507ad05]::diagnostic_builder::EmissionGuarantee>::emit_producing_guarantee
18: 0x7faf1f7369be - <rustc_errors[89ec94d63507ad05]::DiagCtxt>::bug::<alloc[1377227f5558ef79]::string::String>
19: 0x7faf1f7d23db - rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt::<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}
20: 0x7faf1f7b990a - rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_opt::<rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}, !>::{closure#0}
21: 0x7faf1f7b9788 - rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_context_opt::<rustc_middle[2cc1c6e52ad3d43f]::ty::context::tls::with_opt<rustc_middle[2cc1c6e52ad3d43f]::util::bug::opt_span_bug_fmt<rustc_span[467c297c964200f6]::span_encoding::Span>::{closure#0}, !>::{closure#0}, !>
22: 0x7faf1d767db0 - rustc_middle[2cc1c6e52ad3d43f]::util::bug::bug_fmt
23: 0x7faf1f7c7712 - <rustc_middle[2cc1c6e52ad3d43f]::ty::generic_args::ArgFolder>::type_param_expected
24: 0x7faf20607464 - <rustc_middle[2cc1c6e52ad3d43f]::ty::generic_args::ArgFolder as rustc_type_ir[7a3f94f8b621150f]::fold::TypeFolder<rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt>>::fold_ty
25: 0x7faf2131ef4c - rustc_mir_transform[f04df7d082cb6ded]::inline::cycle::mir_callgraph_reachable::process
26: 0x7faf2131e2ee - rustc_mir_transform[f04df7d082cb6ded]::inline::cycle::mir_callgraph_reachable
27: 0x7faf2131e1e9 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::mir_callgraph_reachable::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>
28: 0x7faf2131e1ab - <rustc_query_impl[5ca841c3c79670ea]::query_impl::mir_callgraph_reachable::dynamic_query::{closure#2} as core[30be359c16b30868]::ops::function::FnOnce<(rustc_middle[2cc1c6e52ad3d43f]::ty::context::TyCtxt, (rustc_middle[2cc1c6e52ad3d43f]::ty::instance::Instance, rustc_span[467c297c964200f6]::def_id::LocalDefId))>>::call_once
29: 0x7faf2131db1d - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<(rustc_middle[2cc1c6e52ad3d43f]::ty::instance::Instance, rustc_span[467c297c964200f6]::def_id::LocalDefId), rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
30: 0x7faf2131d85e - rustc_query_impl[5ca841c3c79670ea]::query_impl::mir_callgraph_reachable::get_query_non_incr::__rust_end_short_backtrace
31: 0x7faf210b57fb - <rustc_mir_transform[f04df7d082cb6ded]::inline::Inliner>::try_inlining
32: 0x7faf210b1b86 - <rustc_mir_transform[f04df7d082cb6ded]::inline::Inliner>::process_blocks
33: 0x7faf20806363 - <rustc_mir_transform[f04df7d082cb6ded]::inline::Inline as rustc_middle[2cc1c6e52ad3d43f]::mir::MirPass>::run_pass
34: 0x7faf206123e6 - rustc_mir_transform[f04df7d082cb6ded]::pass_manager::run_passes_inner
35: 0x7faf209afecd - rustc_mir_transform[f04df7d082cb6ded]::optimized_mir
36: 0x7faf20674735 - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::optimized_mir::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 8usize]>>
37: 0x7faf20674d21 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefIdCache<rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
38: 0x7faf2067455e - rustc_query_impl[5ca841c3c79670ea]::query_impl::optimized_mir::get_query_non_incr::__rust_end_short_backtrace
39: 0x7faf2084199b - rustc_middle[2cc1c6e52ad3d43f]::query::plumbing::query_get_at::<rustc_query_system[125a8aa150dcabe3]::query::caches::DefIdCache<rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 8usize]>>>
40: 0x7faf20fd91af - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::unused_generic_params::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 4usize]>>
41: 0x7faf20fd8973 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::DefaultCache<rustc_middle[2cc1c6e52ad3d43f]::ty::instance::InstanceDef, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 4usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
42: 0x7faf20fd865c - rustc_query_impl[5ca841c3c79670ea]::query_impl::unused_generic_params::get_query_non_incr::__rust_end_short_backtrace
43: 0x7faf20fd45da - rustc_interface[c2746bee48761670]::passes::analysis
44: 0x7faf20fd3bdf - rustc_query_impl[5ca841c3c79670ea]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[5ca841c3c79670ea]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>
45: 0x7faf212a17b2 - rustc_query_system[125a8aa150dcabe3]::query::plumbing::try_execute_query::<rustc_query_impl[5ca841c3c79670ea]::DynamicConfig<rustc_query_system[125a8aa150dcabe3]::query::caches::SingleCache<rustc_middle[2cc1c6e52ad3d43f]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[5ca841c3c79670ea]::plumbing::QueryCtxt, false>
46: 0x7faf212a1515 - rustc_query_impl[5ca841c3c79670ea]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
47: 0x7faf212e2436 - rustc_interface[c2746bee48761670]::interface::run_compiler::<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}
48: 0x7faf20f60248 - std[f801e042bca9681]::sys_common::backtrace::__rust_begin_short_backtrace::<rustc_interface[c2746bee48761670]::util::run_in_thread_with_globals<rustc_interface[c2746bee48761670]::util::run_in_thread_pool_with_globals<rustc_interface[c2746bee48761670]::interface::run_compiler<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>
49: 0x7faf20f60077 - <<std[f801e042bca9681]::thread::Builder>::spawn_unchecked_<rustc_interface[c2746bee48761670]::util::run_in_thread_with_globals<rustc_interface[c2746bee48761670]::util::run_in_thread_pool_with_globals<rustc_interface[c2746bee48761670]::interface::run_compiler<core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>, rustc_driver_impl[65af58b05c4f91ef]::run_compiler::{closure#0}>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[30be359c16b30868]::result::Result<(), rustc_span[467c297c964200f6]::ErrorGuaranteed>>::{closure#1} as core[30be359c16b30868]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
50: 0x7faf1c598735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h99757397e7c4fa77
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2015:9
51: 0x7faf1c598735 - <alloc::boxed::Box<F,A> as core::ops::function::FnOnce<Args>>::call_once::h7e0e3d311e6447da
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/alloc/src/boxed.rs:2015:9
52: 0x7faf1c598735 - std::sys::pal::unix::thread::Thread::new::thread_start::h0eb0f22e3002fa19
at /rustc/af88f7db51f6f2a1472f9279d7c7e7c822afff77/library/std/src/sys/pal/unix/thread.rs:108:17
53: 0x7faf1c3839eb - <unknown>
54: 0x7faf1c4077cc - <unknown>
55: 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 (af88f7db5 2024-02-08) running on x86_64-unknown-linux-gnu
note: compiler flags: -Z polymorphize=on -Z inline-mir=yes -Z dump-mir-dir=dir
query stack during panic:
#0 [mir_callgraph_reachable] computing if `<impl at /tmp/icemaker_global_tempdir.smWWDFyFinWB/rustc_testrunner_tmpdir_reporting.PwzVr2WO2dCz/mvce.rs:25:1: 25:21>::convert_helper::<'_, ()>` (transitively) calls `extend_lifetime`
#1 [optimized_mir] optimizing MIR for `extend_lifetime`
#2 [unused_generic_params] determining which generic parameters are unused by `extend_lifetime`
#3 [analysis] running analysis passes on this crate
end of query stack
error: aborting due to 9 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0195, E0261, E0601, E0658.
For more information about an error, try `rustc --explain E0195`.
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Unstable option: Polymorphization.Category: This is a bug.Issue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Status: This bug is tracked inside the repo by a `known-bug` test.Relevant to the compiler team, which will review and decide on the PR/issue.This issue requires a nightly compiler in some way.