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Chris Willmore committed 6d7d45a0a46
When clearing type data for failure diagnosis, reset the lvalue access kind too. That way, re-typechecking doesn't complain about the lvalue access kind bit already having been set. <rdar://problem/23185177> Compiler crashes in Assertion failed: ((AllowOverwrite || !E->hasLValueAccessKind()) && "l-value access kind has already been set"), function visit Swift SVN r32854