closure rvalue not checked for WF allowing it to assume more implied bounds
Open
Nobody has claimed this yet.
A-borrow-checker
A-closures
A-NLL
C-bug
NLL-sound
T-types
- Dominant language
- Rust
- Stars
- 119k
- Forks
- 16.1k
- PR merge metrics
- PR metrics pending
Description
The following should not compile because the bound D: 'static is not satisfied in fn test:
struct Static<D: 'static>(Option<D>);
pub fn test<D>() {
let _ = || {
Static(None::<D>)
};
}
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 with the Rust reproducer in the issue and verify that it currently compiles despite the missing D: 'static bound. Trace how closure rvalues are checked for well-formedness, then add a regression test demonstrating that test is rejected when the bound is unsatisfied.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- rust
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100