John McCall cd78e805e9 When converting a block pointer to an Objective-C pointer type, extend ...

the lifetime of the block by copying it to the heap, or else we'll get
a dangling reference because the code working with the non-block-typed
object will not know it needs to copy.

There is some danger here, e.g. with assigning a block literal to an
unsafe variable, but, well, it's an unsafe variable.

llvm-svn: 139451

2011-09-10 01:16:55 +00:00

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