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Fix crash with report generation on namespace packages (again) #16019

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Sep 2, 2023
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8 changes: 6 additions & 2 deletions mypy/report.py
Original file line number Diff line number Diff line change
Expand Up @@ -171,8 +171,12 @@ def on_file(
) -> None:
# Count physical lines. This assumes the file's encoding is a
# superset of ASCII (or at least uses \n in its line endings).
with open(tree.path, "rb") as f:
physical_lines = len(f.readlines())
try:
with open(tree.path, "rb") as f:
physical_lines = len(f.readlines())
except IsADirectoryError:
# can happen with namespace packages
physical_lines = 0

func_counter = FuncCounterVisitor()
tree.accept(func_counter)
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