"Missing return statement" error for functions having infinite loop unconditionally by looping on non-exhaustive generator
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- Python
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Description
When having functions having infinite loop unconditionally by looping on non-exhaustive generator, there should be no return statements after the infinite looping block since all statements after the looping block are unreachable. Therefore, this "Missing return statement" error is a false-positive. The test case exposing this false-positive is implemented in https://github.com/python/mypy/pull/7373 .
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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 test case in pull request #7373 and trace the missing-return analysis it exercises for a non-exhaustive generator loop. Confirm the existing test reproduces the false positive, then verify that the test passes without reporting a missing return for code after the unconditional loop.
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Assessment
- Tech stack
- python
- Domain
- devtools
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100