segfault in parsing / parse_stmt_or_expr #3974
Description
auto-reduced (treereduce-rust):
//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use
impl<'a, F> RunUntil<'a, F> {
fn project<'pin>() -> Projection<'pin, 'a, F> {
Self!()
}
}original code
original:
//@ edition:2018
//@ revisions: rpass1
// Regression test for #86753. The `type_implements_trait` query (since moved to a method)
// was encountering an ICE during incremental testing when hashing its arguments.
#![warn(rust_2021_compatibility)]
use std::future::Future;
use std::pin::Pin;
use std::task::{Poll, Context};
struct LocalSet {}
struct RunUntil<'a, F> {
_local_set: &'a LocalSet,
_future: F,
}
impl<'a, F> RunUntil<'a, F> {
fn project<'pin>(self: Pin<&'pin mut Self>) -> Projection<'pin, 'a, F> {
Self!()
}
}
struct Projection<'pin, 'a, F>
where
RunUntil<'a, F>: 'pin,
{
pub local_set: &'pin mut &'a LocalSet,
pub future: Pin<&'pin mut F>,
}
impl LocalSet {
fn withwith(&self, _f: impl FnOnce() -> T) -> T {
unimplemented!()
}
}
impl<T: Future> Future for RunUntil<'_, T> {
type Output = T::Output;
fn poll(self: Pin<&mut Self>, cx: &mut Output<'_>) -> Poll<Self::Output> {
let me = self.project();
me.local_set.with(|| {
let _ = cx.waker();
let f = me.future;
let _ = f.future(cx);
Poll::Pending
})
}
}
fn main(self: Pin<&'pin mut Self>) {}Version information:
Command:
/home/matthias/vcs/github/gccrs/gccrs-build/gcc/crab1 -frust-incomplete-and-experimental-compiler-do-not-use
Program output
crab1: internal compiler error: Segmentation fault
0x2fecaf8 internal_error(char const*, ...)
../../gcc/diagnostic-global-context.cc:517
0x196d57f crash_signal
../../gcc/toplev.cc:321
0xd09268 Rust::Parser<Rust::Lexer>::parse_stmt_or_expr()
../../gcc/rust/parse/rust-parse-impl.h:11693
0xd09446 Rust::Parser<Rust::Lexer>::parse_block_expr(std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >, tl::optional<Rust::AST::LoopLabel>, unsigned long)
../../gcc/rust/parse/rust-parse-impl.h:7221
0xd2d357 Rust::Parser<Rust::Lexer>::parse_inherent_impl_function_or_method(Rust::AST::Visibility, std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >)
../../gcc/rust/parse/rust-parse-impl.h:5651
0xd33d0a Rust::Parser<Rust::Lexer>::parse_inherent_impl_item()
../../gcc/rust/parse/rust-parse-impl.h:5532
0xd05c93 Rust::Parser<Rust::Lexer>::parse_impl(Rust::AST::Visibility, std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >)
../../gcc/rust/parse/rust-parse-impl.h:5338
0xd07773 Rust::Parser<Rust::Lexer>::parse_vis_item(std::vector<Rust::AST::Attribute, std::allocator<Rust::AST::Attribute> >)
../../gcc/rust/parse/rust-parse-impl.h:1420
0xd3fe5a Rust::Parser<Rust::Lexer>::parse_item(bool)
../../gcc/rust/parse/rust-parse-impl.h:1153
0xd40195 Rust::Parser<Rust::Lexer>::parse_items()
../../gcc/rust/parse/rust-parse-impl.h:427
0xdbe7ed Rust::Parser<Rust::Lexer>::parse_crate()
../../gcc/rust/parse/rust-parse-impl.h:456
0xdb8d37 Rust::Session::compile_crate(char const*)
../../gcc/rust/rust-session-manager.cc:547
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Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.