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Avoid crash on lamba (a, b): a with context. Fix #1421 #1452

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Merged
merged 1 commit into from
Apr 29, 2016
Merged

Avoid crash on lamba (a, b): a with context. Fix #1421 #1452

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2 changes: 2 additions & 0 deletions mypy/checkexpr.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1267,6 +1267,8 @@ def visit_func_expr(self, e: FuncExpr) -> Type:
else:
# Type context available.
self.chk.check_func_item(e, type_override=inferred_type)
if e.expr() not in self.chk.type_map:
self.accept(e.expr())
ret_type = self.chk.type_map[e.expr()]
return replace_callable_return_type(inferred_type, ret_type)

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8 changes: 8 additions & 0 deletions mypy/test/data/check-python2.test
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Expand Up @@ -193,3 +193,11 @@ def f((x,)): return x
def g((x)): return x
f(0) + g(0)
[out]

[case testLambdaAsSortKeyForTuplePython2]
from typing import Any, Tuple, Callable
def bar(key: Callable[[Tuple[int, int]], int]) -> int:
pass
def foo() -> int:
return bar(key=lambda (a, b): a)
[out]