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2015 Jun 01
4
[LLVMdev] RFC: Adding attribute(nonnull) to things in libc++
This weekend, I got an email from Nuno Lopes informing me that UBSAN now paid attention to attribute(nonnull), and he was having some problems with it going off when using libc++. I did some investigation, and found that he was exactly right - there were places (deep inside the vector code, for example) which called std::memcpy(null, null, 0) - which is definitely UB. In an ideal world, our C