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Don't crash in try_infer_partial_type() if var.type is None. #1752

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Merged
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Jun 27, 2016
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Don't crash in try_infer_partial_type() if var.type is None. #1752

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2 changes: 1 addition & 1 deletion mypy/checkexpr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -157,7 +157,7 @@ def try_infer_partial_type(self, e: CallExpr) -> None:
partial_types = self.chk.find_partial_types(var)
if partial_types is not None and not self.chk.current_node_deferred:
partial_type = cast(PartialType, var.type)
if partial_type.type is None:
if partial_type is None or partial_type.type is None:
# A partial None type -> can't infer anything.
return
typename = partial_type.type.fullname()
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