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Don't infinite loop on self deps in --follow-imports=normal #9302

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Aug 14, 2020
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Don't infinite loop on self deps in --follow-imports=normal #9302

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4 changes: 4 additions & 0 deletions mypy/dmypy_server.py
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Original file line number Diff line number Diff line change
Expand Up @@ -557,6 +557,10 @@ def fine_grained_increment_follow_imports(self, sources: List[BuildSource]) -> L
if module[0] not in graph:
continue
sources2 = self.direct_imports(module, graph)
# Filter anything already seen before. This prevents
# infinite looping if there are any self edges. (Self
# edges are maybe a bug, but...)
sources2 = [source for source in sources2 if source.module not in seen]
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Would it be better to do this filtering in direct_imports?

changed, new_files = self.find_reachable_changed_modules(
sources2, graph, seen, changed_paths
)
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