Fix crash on circular star import in incremental mode #20511
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According to mypy_primer, this change doesn't affect type check results on a corpus of open source code. ✅ |
hauntsaninja
approved these changes
Jan 2, 2026
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This allows to re-enable two more tests in parallel mode.
The fix is kind of simple, replace any remaining placeholders with a
Varon final iteration (similar to what we do for regularfrom ... import x). This has one unfortunate consequence: now each error is only reported once (which is good), but it will be always reported in a module with a star import (because of how SCCs are ordered). I don't see any simple way to fix this, but IMO an error in a somewhat confusing place is better than a crash.