[CodeCompletion] Reset 'hasSingleExpressionBody' when setting function body #37324
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Previously, completing inside non single expression body might cause a crash if you had done any completion with single expression in the same body.
e.g.
after that:
That was because the
hasSingleExpressionBody
flag wasn't cleared when reusing the function for subsequent completions.This patch just clears it whenever a new parsed body is set to a function.
rdar://75358153