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J. Nick Koston
abd6a4f6a9
When Callback::create receives a function reference (e.g. void(&)(int)), &callable gives the address of the function's machine code, not a pointer variable. The memcpy then reads bytes from executable code memory instead of copying a function pointer value. Fix by decaying the callable into a local variable before memcpy, which converts function references to function pointers stored on the stack. No current callers trigger this bug (all pass lambdas), but this prevents incorrect behavior if bare function names are ever passed.
