Replace hard crash with typecheck error when subclass method has the same name as type alias #13015
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Description
Fixes #5425.
Typechecking for method overrides ended in an
assert False
for any AST nodes other thanFuncDef
,OverloadedFuncDef
,Decorator
, andVar
. This PR replaces this with a typecheck error for any unrecognized AST nodes instead.Test Plan
Added a new test case to
check-classes.test
covering the original bug report from the example, as well as some extra cases that Jukka mentioned in the comments.