https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89569
--- Comment #3 from Jonny Grant <jg at jguk dot org> --- (In reply to Jonathan Wakely from comment #2) > Why would 3 be the expected value? Line numbers are natural numbers, not > uint32. Yes, you're right. if the behaviour was defined to be the same as clang, it would wrap a uint32. Anyway, better it just use uint64. line 0 is never a valid line, so if it goes above the limit for the type, maybe just fix it on 0? Oddly "#line 0" is also still not rejected by GCC. As I understand it, "#line n" sets the next line's number. So zero would never be valid.
