I've said before¹ that I'm convinced that ‘undefined behavior’ was an actual mistake by the C89 committee that would not have been accepted if anyone at the tim

I've said before¹ that I'm convinced that ‘undefined behavior’ was an actual mistake by the C89 committee that would not have been accepted if anyone at the time had realized the future implications. It is precisely “a license for the compiler to undertake aggressive optimizations that are completely legal by the committee's rules, but make hash of apparently safe programs” (as dmr said of `noalias`²). ¹ https://news.ycombinator.com/item?id=30024867 https://news.ycombinator.com/item?id=30024867 ² https://www.lysator.liu.se/c/dmr-on-noalias.html https://www.lysator.liu.se/c/dmr-on-noalias.html