Fix a crash in method-hidden lookup for unknown base classes
#3532
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The patch replaces `mro()` with `ancestors()` as the former is not fully capable of generating the complete linearization when dealing with ambiguous inferences. Close #3527
Pierre-Sassoulas
approved these changes
Apr 28, 2020
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The patch replaces
mro()withancestors()as the former is notfully capable of generating the complete linearization when
dealing with ambiguous inferences.
Close #3527