Read the spec for memcpy: memcpy's behavior on overlapping memory regions is undefined - not "required to corrupt memory", but undefined. Changing memcpy from n

Read the spec for memcpy: memcpy's behavior on overlapping memory regions is undefined - not "required to corrupt memory", but undefined. Changing memcpy from not breaking on overlapping memory regions to breaking does not fix any bugs. Adobe should not rely on non-spec-defined behavior, but there's no reason why glibc <i>should</i> be making this change without making a major version number change.