Fix crash on ErasedType and covers_at_runtime#11924
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JukkaL merged 5 commits intopython:masterfrom Jan 7, 2022
sobolevn:issue-11913
Merged
Fix crash on ErasedType and covers_at_runtime#11924JukkaL merged 5 commits intopython:masterfrom sobolevn:issue-11913
ErasedType and covers_at_runtime#11924JukkaL merged 5 commits intopython:masterfrom
sobolevn:issue-11913
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JukkaL
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Jan 6, 2022
mypy/subtypes.py
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| item = get_proper_type(item) | ||
| supertype = get_proper_type(supertype) | ||
| if (isinstance(item, (ErasedType, DeletedType)) | ||
| or isinstance(supertype, (ErasedType, DeletedType))): |
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Hmm I wonder if ErasedType instances can be nested inside unions, for example, and still cause a crash. Maybe erase_type should just propagate erased types unmodified? I don't think that DeletedType can be nested so it seems safe to handle here, though I'm not sure we need special casing for it. Did you find a use case where we encounter deleted types here, or is it here more as a defensive measure?
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Hm, good idea. I will try it!
Did you find a use case where we encounter deleted types here, or is it here more as a defensive measure?
More like a defensive programming. I will remove it, because it does not make much sense without ErasedType.
hauntsaninja
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Jan 6, 2022
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
tushar-deepsource
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Jan 20, 2022
Closes python#11913 Refs python#11273 Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
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Closes #11913
Refs #11273
CC @hauntsaninja