Closed
Description
Code
#![allow(incomplete_features)]
#![feature(generic_associated_types)]
#![feature(const_generics)]
pub trait Buffer<const T: usize> {}
pub trait Device {
type Buffer<const T: usize>: Buffer<{ T }>;
fn create_buffer<const T: usize>(&self) -> Option<Self::Buffer<{ T }>>;
}
fn main() {}Meta
rustc --version --verbose:
rustc 1.47.0-nightly (6c8927b0c 2020-07-26)
binary: rustc
commit-hash: 6c8927b0cf80ceee19386026cf9d7fd4fd9d486f
commit-date: 2020-07-26
host: x86_64-apple-darwin
release: 1.47.0-nightly
LLVM version: 10.0
Error output
error: internal compiler error: src/librustc_typeck/collect/type_of.rs:82:26: unexpected const parent path Ty(Ty { hir_id: HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 8 }, kind: Path(TypeRelative(Ty { hir_id: HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 10 }, kind: Path(Resolved(None, Path { span: src/main.rs:10:55: 10:74 (#0), res: SelfTy(Some(DefId(0:5 ~ playground[a09e]::Device[0])), None), segments: [PathSegment { ident: Self#0, hir_id: Some(HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 9 }), res: Some(SelfTy(Some(DefId(0:5 ~ playground[a09e]::Device[0])), None)), args: None, infer_args: false }] })), span: src/main.rs:10:55: 10:74 (#0) }, PathSegment { ident: Buffer#0, hir_id: Some(HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 16 }), res: Some(Err), args: Some(GenericArgs { args: [Const(ConstArg { value: AnonConst { hir_id: HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 11 }, body: BodyId { hir_id: HirId { owner: DefId(0:9 ~ playground[a09e]::Device[0]::create_buffer[0]), local_id: 15 } } }, span: src/main.rs:10:68: 10:73 (#0) })], bindings: [], parenthesized: false }), infer_args: false })), span: src/main.rs:10:55: 10:74 (#0) }
Backtrace
error: internal compiler error: src/librustc_typeck/collect/type_of.rs:82:26: unexpected const parent path Ty(Ty { hir_id: HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 13 }, kind: Path(TypeRelative(Ty { hir_id: HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 15 }, kind: Path(Resolved(None, Path { span: gfx/src/device.rs:15:66: 15:91 (#0), res: SelfTy(Some(DefId(0:30 ~ gfx[85a5]::device[0]::Device[0])), None), segments: [PathSegment { ident: Self#0, hir_id: Some(HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 14 }), res: Some(SelfTy(Some(DefId(0:30 ~ gfx[85a5]::device[0]::Device[0])), None)), args: None, infer_args: false }] })), span: gfx/src/device.rs:15:66: 15:91 (#0) }, PathSegment { ident: Buffer#0, hir_id: Some(HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 23 }), res: Some(Err), args: Some(GenericArgs { args: [Type(Ty { hir_id: HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 16 }, kind: Path(Resolved(None, Path { span: gfx/src/device.rs:15:79: 15:80 (#0), res: Def(TyParam, DefId(0:38 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]::T[0])), segments: [PathSegment { ident: T#0, hir_id: Some(HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 17 }), res: Some(Def(TyParam, DefId(0:38 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]::T[0]))), args: None, infer_args: false }] })), span: gfx/src/device.rs:15:79: 15:80 (#0) }), Const(ConstArg { value: AnonConst { hir_id: HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 18 }, body: BodyId { hir_id: HirId { owner: DefId(0:37 ~ gfx[85a5]::device[0]::Device[0]::create_buffer[0]), local_id: 22 } } }, span: gfx/src/device.rs:15:82: 15:90 (#0) })], bindings: [], parenthesized: false }), infer_args: false })), span: gfx/src/device.rs:15:66: 15:91 (#0) })
thread 'rustc' panicked at 'Box<Any>', /rustc/6c8927b0cf80ceee19386026cf9d7fd4fd9d486f/src/libstd/macros.rs:13:23
stack backtrace:
0: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
1: core::fmt::write
2: std::io::Write::write_fmt
3: std::panicking::default_hook::{{closure}}
4: std::panicking::default_hook
5: rustc_driver::report_ice
6: std::panicking::rust_panic_with_hook
7: std::panicking::begin_panic
8: rustc_errors::HandlerInner::span_bug
9: rustc_errors::Handler::span_bug
10: rustc_middle::util::bug::opt_span_bug_fmt::{{closure}}
11: rustc_middle::ty::context::tls::with_opt::{{closure}}
12: rustc_middle::ty::context::tls::with_opt
13: rustc_middle::util::bug::opt_span_bug_fmt
14: rustc_middle::util::bug::span_bug_fmt
15: rustc_typeck::collect::type_of::opt_const_param_of
16: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::opt_const_param_of>::compute
17: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
18: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
19: rustc_data_structures::stack::ensure_sufficient_stack
20: rustc_query_system::query::plumbing::get_query_impl
21: rustc_typeck::check::typeck
22: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck>::compute
23: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
24: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
25: rustc_data_structures::stack::ensure_sufficient_stack
26: rustc_query_system::query::plumbing::get_query_impl
27: rustc_query_system::query::plumbing::ensure_query_impl
28: rustc_typeck::check::typeck_item_bodies
29: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::typeck_item_bodies>::compute
30: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
31: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
32: rustc_data_structures::stack::ensure_sufficient_stack
33: rustc_query_system::query::plumbing::get_query_impl
34: rustc_typeck::check_crate
35: rustc_interface::passes::analysis
36: rustc_middle::ty::query::<impl rustc_query_system::query::config::QueryAccessors<rustc_middle::ty::context::TyCtxt> for rustc_middle::ty::query::queries::analysis>::compute
37: rustc_middle::dep_graph::<impl rustc_query_system::dep_graph::DepKind for rustc_middle::dep_graph::dep_node::DepKind>::with_deps
38: rustc_query_system::dep_graph::graph::DepGraph<K>::with_task_impl
39: rustc_query_system::query::plumbing::get_query_impl
40: rustc_middle::ty::context::tls::enter_global
41: rustc_interface::queries::<impl rustc_interface::interface::Compiler>::enter
42: rustc_span::with_source_map
43: rustc_interface::interface::create_compiler_and_run
44: scoped_tls::ScopedKey<T>::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 1.47.0-nightly (6c8927b0c 2020-07-26) running on x86_64-apple-darwin
note: compiler flags: -C embed-bitcode=no -C debuginfo=2 -C incremental --crate-type lib
note: some of the compiler flags provided by cargo are hidden
query stack during panic:
#0 [opt_const_param_of] computing the optional const parameter of `device::Device::create_buffer::{{constant}}#0`
#1 [typeck] type-checking `device::Device::create_buffer::{{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 previous error
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Area: const generics (parameters and arguments)Category: This is a bug.`#![feature(generic_associated_types)]` a.k.a. GATsIssue: The compiler panicked, giving an Internal Compilation Error (ICE) ❄️Relevant to the compiler team, which will review and decide on the PR/issue.ICE tracked in rust-lang/glacier.This issue requires a nightly compiler in some way.