Rust-GCC / Rust-GCC/gccrs

Name resolution 2.0 does not handle imports in modules

Open
#3,314 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Dominant language
C++
Stars
2.9k
Forks
231
Avg merge
19h 55m
Merged PRs (30d)
67

Description

Summary

Imports don't appear to work in modules with name resolution 2.0

Reproducer

I tried this code:

fn f() {}

mod a {
    fn g() {
    }

    use super::f;
    use self::g as g1;
    use g as g2;

    fn h() {
        f();
        g1();
        g2();
    }
}
Does the code make use of any (1.49) nightly feature ?
  • Nightly
Godbolt link

https://godbolt.org/z/ffYY5qYMG

Actual behavior

The current behavior is...
Internal compiler erros:

crab1: internal compiler error: in value, at rust/util/optional.h:1333
0x29fcec5 diagnostic_context::diagnostic_impl(rich_location*, diagnostic_metadata const*, diagnostic_option_id, char const*, __va_list_tag (*) [1], diagnostic_t)
	???:0
0x2a1e116 internal_error(char const*, ...)
	???:0
0xb95dd8 fancy_abort(char const*, int, char const*)
	???:0
0xef2c8e Rust::Privacy::PrivacyReporter::visit(Rust::HIR::PathInExpression&)
	???:0
0xef20aa Rust::Privacy::PrivacyReporter::visit(Rust::HIR::CallExpr&)
	???:0
0xef2167 Rust::Privacy::PrivacyReporter::visit(Rust::HIR::BlockExpr&)
	???:0
0xef241f Rust::Privacy::PrivacyReporter::visit(Rust::HIR::Module&)
	???:0
0xef27e1 Rust::Privacy::PrivacyReporter::go(Rust::HIR::Crate&)
	???:0
0xeefe73 Rust::Privacy::Resolver::resolve(Rust::HIR::Crate&)
	???:0
0xcfdd03 Rust::Session::compile_crate(char const*)
	???:0
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.
Compiler returned: 1
Expected behavior

I expected to see...
No errors, maybe unused code warnings

GCC Version

gccrs (Compiler-Explorer-Build-gcc-7d62c5db3aeef0bc962be1b6d6a8b2ec3b2afd32-binutils-2.44) 16.0.0 20250604 (experimental)

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Reproduce the module import example with name resolution 2.0 and inspect the reported entry points Rust::Privacy::Resolver::resolve and Rust::Privacy::PrivacyReporter::visit, especially the HIR path and call-expression visits. There is no test file named in the issue; done means the example no longer triggers an internal compiler error and produces only the expected diagnostics.

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
Mostly clear
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.