https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83011
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Keywords| |diagnostic Status|UNCONFIRMED |WAITING Last reconfirmed| |2017-11-16 CC| |msebor at gcc dot gnu.org Ever confirmed|0 |1 --- Comment #1 from Martin Sebor <msebor at gcc dot gnu.org> --- I cannot reproduce any warnings with the INN function (extracted from timer.c), either with the top of trunk (GCC 8) or with the top of GCC 7-branch. Can you provide a preprocessed translation unit (the result of compiling timer.c with -E instead of -c), and the compiler options? I think in English the note would read like: snprintf output 2 or more bytes (assuming 3) into a destination of size 1 This is issued when the output is in some range where the lower bound would fit but the upper bound would not. Since the string is an argument and the buffer size depends on timer_count which also unknown it's not clear to me what the range is being determined from. Are you using -flto to build the project?