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ICE: type_of.rs:115:26: unexpected anon const res PrimTy(Uint(Usize)) in path #78005

Closed chengniansun closed 4 years ago

chengniansun commented 4 years ago

Code

fn main() {
    let x: isize<isize>;
    let x: i8<isize>;
    let x: i16<isize>;
    let x: i32<isize>;
    let x: i64<isize>;
    let x: usize<main>;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
    let x;
}

Meta

rustc --version --verbose:

rustc 1.49.0-nightly (e160e5cb8 2020-10-14)

binary: rustc

commit-hash: e160e5cb80652bc2afe74cb3affbe35b74243ea9

commit-date: 2020-10-14

host: x86_64-unknown-linux-gnu

release: 1.49.0-nightly

LLVM version: 11.0

Error output


error[E0109]: type arguments are not allowed for this type
 --> reduced_mutant.rs:2:18
  |
2 |     let x: isize<isize>;
  |                  ^^^^^ type argument not allowed

error[E0109]: type arguments are not allowed for this type
 --> reduced_mutant.rs:3:15
  |
3 |     let x: i8<isize>;
  |               ^^^^^ type argument not allowed

error[E0109]: type arguments are not allowed for this type
 --> reduced_mutant.rs:4:16
  |
4 |     let x: i16<isize>;
  |                ^^^^^ type argument not allowed

error[E0109]: type arguments are not allowed for this type
 --> reduced_mutant.rs:5:16
  |
5 |     let x: i32<isize>;
  |                ^^^^^ type argument not allowed

error[E0109]: type arguments are not allowed for this type
 --> reduced_mutant.rs:6:16
  |
6 |     let x: i64<isize>;
  |                ^^^^^ type argument not allowed

error[E0109]: const arguments are not allowed for this type
 --> reduced_mutant.rs:7:18
  |
7 |     let x: usize<main>;
  |                  ^^^^ const argument not allowed

error: internal compiler error: compiler/rustc_typeck/src/collect/type_of.rs:115:26: unexpected anon const res PrimTy(Uint(Usize)) in path: Path { span: reduced_mutant.rs:7:12: 7:23 (#0), res: PrimTy(Uint(Usize)), segments: [PathSegment { ident: usize#0, hir_id: Some(HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 57 }), res: Some(Err), args: Some(GenericArgs { args: [Const(ConstArg { value: AnonConst { hir_id: HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 54 }, body: BodyId { hir_id: HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 56 } } }, span: reduced_mutant.rs:7:18: 7:22 (#0) })], bindings: [], parenthesized: false }), infer_args: false }] }

thread 'rustc' panicked at 'Box<Any>', /rustc/dd7fc54ebdca419ad9d3ab1e9f5ed14e770768ea/compiler/rustc_errors/src/lib.rs:891:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

note: 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: rustc 1.49.0-nightly (dd7fc54eb 2020-10-15) running on x86_64-unknown-linux-gnu

error: aborting due to 7 previous errors

For more information about this error, try `rustc --explain E0109`.
Backtrace

``` error: internal compiler error: compiler/rustc_typeck/src/collect/type_of.rs:115:26: unexpected anon const res PrimTy(Uint(Usize)) in path: Path { span: reduced_mutant.rs:7:12: 7:23 (#0), res: PrimTy(Uint(Usize)), segments: [PathSegment { ident: usize#0, hir_id: Some(HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 57 }), res: Some(Err), args: Some(GenericArgs { args: [Const(ConstArg { value: AnonConst { hir_id: HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 54 }, body: BodyId { hir_id: HirId { owner: DefId(0:3 ~ reduced_mutant[317d]::main), local_id: 56 } } }, span: reduced_mutant.rs:7:18: 7:22 (#0) })], bindings: [], parenthesized: false }), infer_args: false }] } thread 'rustc' panicked at 'Box', /rustc/dd7fc54ebdca419ad9d3ab1e9f5ed14e770768ea/compiler/rustc_errors/src/lib.rs:891:9 stack backtrace: 0: std::panicking::begin_panic 1: rustc_errors::HandlerInner::span_bug 2: rustc_errors::Handler::span_bug 3: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}} 4: rustc_middle::ty::context::tls::with_opt::{{closure}} 5: rustc_middle::ty::context::tls::with_opt 6: rustc_middle::util::bug::opt_span_bug_fmt 7: rustc_middle::util::bug::span_bug_fmt 8: rustc_typeck::collect::type_of::opt_const_param_of 9: rustc_middle::ty::query:: for rustc_middle::ty::query::queries::opt_const_param_of>::compute 10: rustc_query_system::dep_graph::graph::DepGraph::with_task_impl 11: rustc_data_structures::stack::ensure_sufficient_stack 12: rustc_query_system::query::plumbing::get_query_impl 13: rustc_typeck::check::typeck 14: rustc_middle::ty::query:: for rustc_middle::ty::query::queries::typeck>::compute 15: rustc_query_system::dep_graph::graph::DepGraph::with_task_impl 16: rustc_data_structures::stack::ensure_sufficient_stack 17: rustc_query_system::query::plumbing::get_query_impl 18: rustc_query_system::query::plumbing::ensure_query_impl 19: rustc_typeck::check::typeck_item_bodies 20: rustc_middle::ty::query:: for rustc_middle::ty::query::queries::typeck_item_bodies>::compute 21: rustc_query_system::dep_graph::graph::DepGraph::with_task_impl 22: rustc_data_structures::stack::ensure_sufficient_stack 23: rustc_query_system::query::plumbing::get_query_impl 24: rustc_typeck::check_crate 25: rustc_interface::passes::analysis 26: rustc_middle::ty::query:: for rustc_middle::ty::query::queries::analysis>::compute 27: rustc_query_system::dep_graph::graph::DepGraph::with_task_impl 28: rustc_data_structures::stack::ensure_sufficient_stack 29: rustc_query_system::query::plumbing::get_query_impl 30: rustc_interface::passes::QueryContext::enter 31: rustc_interface::queries::::enter 32: rustc_span::with_source_map 33: scoped_tls::ScopedKey::set note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace. note: 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: rustc 1.49.0-nightly (dd7fc54eb 2020-10-15) running on x86_64-unknown-linux-gnu query stack during panic: #0 [opt_const_param_of] computing the optional const parameter of `main::{constant#0}` #1 [typeck] type-checking `main::{constant#0}` #2 [typeck_item_bodies] type-checking all item bodies #3 [analysis] running analysis passes on this crate end of query stack error: aborting due to 7 previous errors For more information about this error, try `rustc --explain E0109`. ```

SNCPlay42 commented 4 years ago

Reduced:

fn main() {
    let x: usize<main>;
}
SNCPlay42 commented 4 years ago

This doesn't ICE on 1.46.

@rustbot modify labels: +regression-from-stable-to-stable

hameerabbasi commented 4 years ago

We decided to label this P-medium as it's unlikely to be hit, it used to be an error in a previous release. Also, it's very esoteric code. Link to Zulip stream.

tesuji commented 4 years ago

Line triggered the ICE: https://github.com/rust-lang/rust/blob/95b4a4f0eee935f9e0c80b0ceef34866bcb72ca3/compiler/rustc_typeck/src/collect/type_of.rs#L115-L120

Regressed in #74113, cc @lcnr fyi

Note that the snippet doesn't have to contain main:

fn foo() {
    let x: usize<foo>;
}
bisected with cargo-bisect-rustc v0.5.2 Host triple: x86_64-unknown-linux-gnu Reproduce with: ```bash cargo bisect-rustc 2020-07-01 --end 2020-08-01 --preserve --regress=ice --without-cargo -- check ```
lcnr commented 4 years ago

Will look into this in a few weeks so I am claiming this for now so I don't forget.

@rustbot claim

If anyone else wants to work on this before that feel free to do so, don't have much time rn

estebank commented 4 years ago

The solution might be as simple as merging the linked match arm with the previous error one, making this a delay_span_bug and ignoring it.

varkor commented 4 years ago

I just saw this issue and thought the same thing. I'm testing the fix now.