segfault in expansion

[matthiaskrgr]

auto-reduced (treereduce-rust):

//@compile-flags: -frust-incomplete-and-experimental-compiler-do-not-use
#[derive(PartialOrd, PartialEq)]

pub fn check_ge(a: Foo, b: Foo) -> bool {
    a >= b
}

original code

original:

// The `derive(PartialOrd)` for a newtype doesn't override `lt`/`le`/`gt`/`ge`.
// This double-checks that the `Option<Ordering>` intermediate values used
// in the operators for such a type all optimize away.

//@ compile-flags: -C opt-level=1

#![crate_type = "lib"]

use std::cmp::Ordering;

#[derive(PartialOrd, PartialEq)]
#[no_mangle]

// CHECK-LABEL: @check_lt
// CHECK-SAME: (i16{{.*}} %[[A:.+]], i16{{.*}} %[[B:.+]])
#[no_mangle]
pub fn check_lt(a: Foo, b: Foo) -> bool {
    // CHECK: %[[R:.+]] = icmp ult i16 %[[A]], %[[B]]
    // CHECK-NEXT: ret i1 %[[R]]
    a < b
}

// CHECK-LABEL: @check_le
// CHECK-SAME: (i16{{.*}} %[[A:.+]], i16{{.*}} %[[B:.+]])
#[no_mangle]
pub fn check_le(a: Foo, b: Foo) -> bool {
    // CHECK: %[[R:.+]] = icmp ule i16 %[[A]], %[[B]]
    // CHECK-NEXT: ret i1 %[[R]]
    a <= b
}

// CHECK-LABEL: @check_gt
// CHECK-SAME: (i16{{.*}} %[[A:.+]], i16{{.*}} %[[B:.+]])
#[no_mangle]
pub fn check_gt(a: Foo, b: Foo) -> bool {
    // CHECK: %[[R:.+]] = icmp ugt i16 %[[A]], %[[B]]
    // CHECK-NEXT: ret i1 %[[R]]
    a > b
}

// CHECK-LABEL: @check_ge
// CHECK-SAME: (i16{{.*}} %[[A:.+]], i16{{.*}} %[[B:.+]])
#[no_mangle]
pub fn check_ge(a: Foo, b: Foo) -> bool {
    // CHECK: %[[R:.+]] = icmp uge i16 %[[A]], %[[B]]
    // CHECK-NEXT: ret i1 %[[R]]
    a >= b
}

Version information:

5dc8c4d

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
0xea0147 void Rust::ExpandVisitor::expand_macro_children<std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >, std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > >(std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >&, std::function<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > (Rust::AST::SingleASTNode)>)
	../../gcc/rust/expand/rust-expand-visitor.h:131
0xea0147 Rust::ExpandVisitor::expand_inner_items(std::vector<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> >, std::allocator<std::unique_ptr<Rust::AST::Item, std::default_delete<Rust::AST::Item> > > >&)
	../../gcc/rust/expand/rust-expand-visitor.cc:239
0xda39b3 Rust::Session::expansion(Rust::AST::Crate&, Rust::Resolver2_0::NameResolutionContext&)
	../../gcc/rust/rust-session-manager.cc:958
0xdb8ed7 Rust::Session::compile_crate(char const*)
	../../gcc/rust/rust-session-manager.cc:620
Please submit a full bug report, with preprocessed source (by using -freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.