Repository: rust
Issue: ICE: `None` in compiler/rustc_middle/src/ty/sty.rs
Labels: I-ICE,T-compiler,C-bug,A-const-generics,S-bug-has-test

<!--
[31mICE[0m: Rustc ./2.rs '' 'thread 'rustc' panicked at compiler/rustc_middle/src/ty/sty.rs:362:36: 'called `Option::unwrap()` on a `None` value'', 'thread 'rustc' panicked at compiler/rustc_middle/src/ty/sty.rs:362:36: 'called `Option::unwrap()` on a `None` value''
File: /tmp/im/2.rs
-->

auto-reduced (treereduce-rust):
````rust
impl<
        const N: usize = {
            const {
                static || {
                    let first = Foo([0; FOO_SIZE]);
                    yield;

                    yield;

                    yield;
                }
            }
        },
    > PartialEq<FixedI8<FRAC_RHS>> for True
{
}


````

original:
````rust
#![feature(generic_const_exprs)]

pub trait True {}

impl<const N: usize = { const {
    static || {
        let first = Foo([0; FOO_SIZE]);
        yield;
        let second = first;
        yield;
        let second = first;
        yield;
    }
} }> PartialEq<FixedI8<FRAC_RHS>> for v0<FRAC_LHS> where
    If<{}>: True
{
}
#![feature(generic_const_exprs)]

pub trait True {}

impl<const pointer_like_trait: usize = { const { InvariantRef::<'a>::NEW } }> PartialEq<FixedI8<FRAC_RHS>> for FixedI8<FRAC_LHS> where
    If<{}>: True {}

````

Version information
````
rustc 1.82.0-nightly (0f26ee4fd 2024-08-17)
binary: rustc
commit-hash: 0f26ee4fd95a1c046582dfb18892f520788e2c2c
commit-date: 2024-08-17
host: x86_64-unknown-linux-gnu
release: 1.82.0-nightly
LLVM version: 19.1.0

````

Command:
`/home/matthias/.rustup/toolchains/master/bin/rustc `

<!--
Include a backtrace in the code block by setting `RUST_BACKTRACE=1` in your
environment. E.g. `RUST_BACKTRACE=1 cargo build`.
-->
<details><summary><strong>Program output</strong></summary>
<p>

```
error[E0412]: cannot find type `FixedI8` in this scope
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:14:17
   |
14 |     > PartialEq<FixedI8<FRAC_RHS>> for True
   |                 ^^^^^^^ not found in this scope

error[E0412]: cannot find type `FRAC_RHS` in this scope
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:14:25
   |
14 |     > PartialEq<FixedI8<FRAC_RHS>> for True
   |                         ^^^^^^^^ not found in this scope
   |
help: you might be missing a type parameter
   |
13 |         }, FRAC_RHS,
   |          ++++++++++

error[E0412]: cannot find type `True` in this scope
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:14:40
   |
14 |     > PartialEq<FixedI8<FRAC_RHS>> for True
   |                                        ^^^^ not found in this scope
   |
help: you may want to use a bool value instead
   |
14 |     > PartialEq<FixedI8<FRAC_RHS>> for true
   |                                        ~~~~

error[E0425]: cannot find value `FOO_SIZE` in this scope
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:5:41
  |
5 |                     let first = Foo([0; FOO_SIZE]);
  |                                         ^^^^^^^^ not found in this scope

error[E0658]: yield syntax is experimental
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:6:21
  |
6 |                     yield;
  |                     ^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
  = help: add `#![feature(coroutines)]` to the crate attributes to enable
  = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error[E0658]: yield syntax is experimental
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:8:21
  |
8 |                     yield;
  |                     ^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
  = help: add `#![feature(coroutines)]` to the crate attributes to enable
  = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error[E0658]: yield syntax is experimental
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:10:21
   |
10 |                     yield;
   |                     ^^^^^
   |
   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
   = help: add `#![feature(coroutines)]` to the crate attributes to enable
   = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error[E0658]: yield syntax is experimental
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:6:21
  |
6 |                     yield;
  |                     ^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
  = help: add `#![feature(coroutines)]` to the crate attributes to enable
  = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:6:21
  |
6 |                     yield;
  |                     ^^^^^
  |
help: use `#[coroutine]` to make this closure a coroutine
  |
4 |                 #[coroutine] static || {
  |                 ++++++++++++

error[E0658]: yield syntax is experimental
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:8:21
  |
8 |                     yield;
  |                     ^^^^^
  |
  = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
  = help: add `#![feature(coroutines)]` to the crate attributes to enable
  = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error[E0658]: yield syntax is experimental
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:10:21
   |
10 |                     yield;
   |                     ^^^^^
   |
   = note: see issue #43122 <https://github.com/rust-lang/rust/issues/43122> for more information
   = help: add `#![feature(coroutines)]` to the crate attributes to enable
   = note: this compiler was built on 2024-08-17; consider upgrading it if it is out of date

error[E0601]: `main` function not found in crate `mvce`
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:16:2
   |
16 | }
   |  ^ consider adding a `main` function to `/tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs`

error: defaults for const parameters are only allowed in `struct`, `enum`, `type`, or `trait` definitions
  --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:2:9
   |
2  | /         const N: usize = {
3  | |             const {
4  | |                 static || {
5  | |                     let first = Foo([0; FOO_SIZE]);
...  |
12 | |             }
13 | |         },
   | |_________^

error[E0425]: cannot find function, tuple struct or tuple variant `Foo` in this scope
 --> /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:5:33
  |
5 |                     let first = Foo([0; FOO_SIZE]);
  |                                 ^^^ not found in this scope

thread 'rustc' panicked at compiler/rustc_middle/src/ty/sty.rs:362:36:
called `Option::unwrap()` on a `None` value
stack backtrace:
   0:     0x7b29de7c429d - <std::sys::backtrace::BacktraceLock::print::DisplayBacktrace as core::fmt::Display>::fmt::hce35dec2bed7e8e1
   1:     0x7b29df005297 - core::fmt::write::haaf8a728f3019c12
   2:     0x7b29e02bbd91 - std::io::Write::write_fmt::hb0dc5188703aea0d
   3:     0x7b29de7c697b - std::panicking::default_hook::{{closure}}::h35c501ae74c82675
   4:     0x7b29de7c65ee - std::panicking::default_hook::hc1ddd62643c4c855
   5:     0x7b29dd958729 - std[54b021f941472252]::panicking::update_hook::<alloc[8840b3d3a55bb7af]::boxed::Box<rustc_driver_impl[ec4d44b725e7aa11]::install_ice_hook::{closure#0}>>::{closure#0}
   6:     0x7b29de7c7297 - std::panicking::rust_panic_with_hook::h7960ad04eaeb646d
   7:     0x7b29de7c6f23 - std::panicking::begin_panic_handler::{{closure}}::had964436d76b60a3
   8:     0x7b29de7c4759 - std::sys::backtrace::__rust_end_short_backtrace::h287862de25ceaa43
   9:     0x7b29de7c6c24 - rust_begin_unwind
  10:     0x7b29db6b1253 - core::panicking::panic_fmt::hb93ba995a275cef9
  11:     0x7b29db87fa9c - core::panicking::panic::he4e48426481834b3
  12:     0x7b29dbd05839 - core::option::unwrap_failed::h850f2e87e5e16379
  13:     0x7b29e0a8af3c - <rustc_middle[10ec7aec7d9fdda3]::ty::sty::ParamConst>::find_ty_from_env.cold
  14:     0x7b29db67b97b - <rustc_trait_selection[78ffaaaa71d4a69f]::traits::fulfill::FulfillProcessor as rustc_data_structures[de25bd5cf5c038d2]::obligation_forest::ObligationProcessor>::process_obligation
  15:     0x7b29df008777 - <rustc_data_structures[de25bd5cf5c038d2]::obligation_forest::ObligationForest<rustc_trait_selection[78ffaaaa71d4a69f]::traits::fulfill::PendingPredicateObligation>>::process_obligations::<rustc_trait_selection[78ffaaaa71d4a69f]::traits::fulfill::FulfillProcessor>
  16:     0x7b29df0cf344 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::demand_coerce_diag
  17:     0x7b29dfafeae0 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_decl
  18:     0x7b29dfafbd41 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_block_with_expected
  19:     0x7b29dfb02247 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  20:     0x7b29df243661 - rustc_hir_typeck[cd6451a3b3fe12c4]::check::check_fn
  21:     0x7b29df985eea - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_closure
  22:     0x7b29dfb0614a - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  23:     0x7b29dfafae56 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_block_with_expected
  24:     0x7b29dfb02247 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  25:     0x7b29dfb0a87f - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  26:     0x7b29dfafae56 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_block_with_expected
  27:     0x7b29dfb02247 - <rustc_hir_typeck[cd6451a3b3fe12c4]::fn_ctxt::FnCtxt>::check_expr_with_expectation_and_args
  28:     0x7b29df7fe24b - rustc_hir_typeck[cd6451a3b3fe12c4]::typeck
  29:     0x7b29df7fb975 - rustc_query_impl[69287ea093d06d1d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[69287ea093d06d1d]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 8usize]>>
  30:     0x7b29df2d4bf9 - rustc_query_system[1449707d44461b06]::query::plumbing::try_execute_query::<rustc_query_impl[69287ea093d06d1d]::DynamicConfig<rustc_query_system[1449707d44461b06]::query::caches::VecCache<rustc_span[a5a4c6b08f7cf6f]::def_id::LocalDefId, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[69287ea093d06d1d]::plumbing::QueryCtxt, false>
  31:     0x7b29df2d3e15 - rustc_query_impl[69287ea093d06d1d]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  32:     0x7b29df2420f5 - rustc_middle[10ec7aec7d9fdda3]::query::plumbing::query_get_at::<rustc_query_system[1449707d44461b06]::query::caches::VecCache<rustc_span[a5a4c6b08f7cf6f]::def_id::LocalDefId, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 8usize]>>>
  33:     0x7b29df7fcdb5 - rustc_hir_typeck[cd6451a3b3fe12c4]::typeck
  34:     0x7b29df7fb975 - rustc_query_impl[69287ea093d06d1d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[69287ea093d06d1d]::query_impl::typeck::dynamic_query::{closure#2}::{closure#0}, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 8usize]>>
  35:     0x7b29df2d4bf9 - rustc_query_system[1449707d44461b06]::query::plumbing::try_execute_query::<rustc_query_impl[69287ea093d06d1d]::DynamicConfig<rustc_query_system[1449707d44461b06]::query::caches::VecCache<rustc_span[a5a4c6b08f7cf6f]::def_id::LocalDefId, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 8usize]>>, false, false, false>, rustc_query_impl[69287ea093d06d1d]::plumbing::QueryCtxt, false>
  36:     0x7b29df2d3e15 - rustc_query_impl[69287ea093d06d1d]::query_impl::typeck::get_query_non_incr::__rust_end_short_backtrace
  37:     0x7b29df2d3a9b - <rustc_middle[10ec7aec7d9fdda3]::hir::map::Map>::par_body_owners::<rustc_hir_analysis[c0d9d1e917b71b24]::check_crate::{closure#4}>::{closure#0}
  38:     0x7b29df2d17e4 - rustc_hir_analysis[c0d9d1e917b71b24]::check_crate
  39:     0x7b29df784cbf - rustc_interface[f40e7651e6b02ea1]::passes::run_required_analyses
  40:     0x7b29dfb5c49e - rustc_interface[f40e7651e6b02ea1]::passes::analysis
  41:     0x7b29dfb5c471 - rustc_query_impl[69287ea093d06d1d]::plumbing::__rust_begin_short_backtrace::<rustc_query_impl[69287ea093d06d1d]::query_impl::analysis::dynamic_query::{closure#2}::{closure#0}, rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 1usize]>>
  42:     0x7b29dff867ee - rustc_query_system[1449707d44461b06]::query::plumbing::try_execute_query::<rustc_query_impl[69287ea093d06d1d]::DynamicConfig<rustc_query_system[1449707d44461b06]::query::caches::SingleCache<rustc_middle[10ec7aec7d9fdda3]::query::erase::Erased<[u8; 1usize]>>, false, false, false>, rustc_query_impl[69287ea093d06d1d]::plumbing::QueryCtxt, false>
  43:     0x7b29dff8654f - rustc_query_impl[69287ea093d06d1d]::query_impl::analysis::get_query_non_incr::__rust_end_short_backtrace
  44:     0x7b29dfdd38ea - rustc_interface[f40e7651e6b02ea1]::interface::run_compiler::<core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>, rustc_driver_impl[ec4d44b725e7aa11]::run_compiler::{closure#0}>::{closure#1}
  45:     0x7b29dfdb3210 - std[54b021f941472252]::sys::backtrace::__rust_begin_short_backtrace::<rustc_interface[f40e7651e6b02ea1]::util::run_in_thread_with_globals<rustc_interface[f40e7651e6b02ea1]::util::run_in_thread_pool_with_globals<rustc_interface[f40e7651e6b02ea1]::interface::run_compiler<core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>, rustc_driver_impl[ec4d44b725e7aa11]::run_compiler::{closure#0}>::{closure#1}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>::{closure#0}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>
  46:     0x7b29dfdb387a - <<std[54b021f941472252]::thread::Builder>::spawn_unchecked_<rustc_interface[f40e7651e6b02ea1]::util::run_in_thread_with_globals<rustc_interface[f40e7651e6b02ea1]::util::run_in_thread_pool_with_globals<rustc_interface[f40e7651e6b02ea1]::interface::run_compiler<core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>, rustc_driver_impl[ec4d44b725e7aa11]::run_compiler::{closure#0}>::{closure#1}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>::{closure#0}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>::{closure#0}::{closure#0}, core[5070cb7ec77c977]::result::Result<(), rustc_span[a5a4c6b08f7cf6f]::ErrorGuaranteed>>::{closure#1} as core[5070cb7ec77c977]::ops::function::FnOnce<()>>::call_once::{shim:vtable#0}
  47:     0x7b29dfdb3beb - std::sys::pal::unix::thread::Thread::new::thread_start::he8fde62ed04f9a93
  48:     0x7b29e152339d - <unknown>
  49:     0x7b29e15a849c - <unknown>
  50:                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: please make sure that you have updated to the latest nightly

note: rustc 1.82.0-nightly (0f26ee4fd 2024-08-17) running on x86_64-unknown-linux-gnu

query stack during panic:
#0 [typeck] type-checking `<impl at /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:1:1: 14:44>::{constant#0}`
#1 [typeck] type-checking `<impl at /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:1:1: 14:44>::{constant#0}::{constant#0}`
end of query stack
error: aborting due to 14 previous errors

Some errors have detailed explanations: E0412, E0425, E0601, E0658.
For more information about an error, try `rustc --explain E0412`.

```

</p>
</details>

<!--
query stack:
4 |                 #[coroutine] static || {
#0 [typeck] type-checking `<impl at /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:1:1: 14:44>::{constant#0}`
#1 [typeck] type-checking `<impl at /tmp/icemaker_global_tempdir.xxLsOJeDobON/rustc_testrunner_tmpdir_reporting.EW3ZNLfKk1Q3/mvce.rs:1:1: 14:44>::{constant#0}::{constant#0}`

-->
@rustbot label +F-generic_const_exprs +F-generic_const_exprs