alt Hacker News> Compilers will not refuse to compile the code, indeed the blog post we are all commenting on reports the results from a bunch of different compilers.
Yes, I see that. I just said they should refuse.
> Compilers will not refuse to compile the code, indeed the blog post we are all commenting on reports the results from a bunch of different compilers.
Yes, I see that. I just said they should refuse.
Because this specific UB is static (not usually the case) both gcc and clang will flag it if Wsequence-point is enabled (and it is part of Wall) (technically the clang warning is Wunsequenced but aliased to the GCC version).
edit: apparently Wunsequenced is enabled by default so clang should warn you out of the box.