ICE in handle_doc_item_attribute, at rust/hir/rust-ast-lower-base.cc:798
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Description
auto-reduced (treereduce-rust):
macro_rules! b {
($doc:expr) => {
#[doc = $doc]
struct B;
};
}
b!(a!());
original:
// check-pass
macro_rules! a {
() => { "a" }
}
macro_rules! b {
($doc:expr) => {
#[doc = $doc]
struct B;
}
}
b!(a!());
fn main() {}
Version information:
a988708b4ba2b5a27715ea34c09ccfd3ed5143ca
Command:
crab1 -Warray-bounds -mtune=generic -march=x86-64 -O0 -L/lib/x86_64-linux-gnu -L/lib/../lib64 -L/usr/lib/x86_64-linux-gnu -L/usr/lib/../lib64 -frust-incomplete-and-experimental-compiler-do-not-use
Program output
crab1: internal compiler error: in handle_doc_item_attribute, at rust/hir/rust-ast-lower-base.cc:798
0x86688d Rust::HIR::ASTLoweringBase::handle_doc_item_attribute(Rust::HIR::ItemWrapper const&, Rust::AST::Attribute const&)
../../gcc/rust/hir/rust-ast-lower-base.cc:798
0x86688d Rust::HIR::ASTLoweringBase::handle_doc_item_attribute(Rust::HIR::ItemWrapper const&, Rust::AST::Attribute const&)
../../gcc/rust/hir/rust-ast-lower-base.cc:786
0xdd86a6 Rust::HIR::ASTLoweringBase::handle_outer_attributes(Rust::HIR::ItemWrapper const&)
../../gcc/rust/hir/rust-ast-lower-base.cc:774
0xde22c6 Rust::HIR::ASTLoweringItem::translate(Rust::AST::Item&)
../../gcc/rust/hir/rust-ast-lower-item.cc:46
0xdcfd27 Rust::HIR::ASTLowering::go()
../../gcc/rust/hir/rust-ast-lower.cc:81
0xdd0221 Rust::HIR::ASTLowering::Resolve(Rust::AST::Crate&)
../../gcc/rust/hir/rust-ast-lower.cc:71
0xc5c218 Rust::Session::compile_crate(char const*)
../../gcc/rust/rust-session-manager.cc:663
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.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by reproducing the reduced Rust case and inspect handle_doc_item_attribute in rust/hir/rust-ast-lower-base.cc:798, using the reported stack trace as the entry point. Confirm that the reduced and original examples no longer trigger an internal compiler error and that the original check-pass case still compiles successfully.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, rust
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Clearly specified
- Newbie friendliness
- 52/100