Heh. Sometime around '94 I helped Southwestern Bell Telephone with that during the 16 bit to 32 bit transitions of a Mac client.
This means that sometime around the mid 2030's some poor programmers will have to take a break from worrying about Y0x80000000 to get bit by the x86-128 varargs bugs.
Initially, I thought it was the transition to 32-bit-clean code in the 68k line, but that was more of a 24-to-32 transition, and it only affected pointers:
This means that sometime around the mid 2030's some poor programmers will have to take a break from worrying about Y0x80000000 to get bit by the x86-128 varargs bugs.