https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78913
--- Comment #5 from Martin Sebor <msebor at gcc dot gnu.org> --- (In reply to Martin Sebor from comment #4) > 1) use the %.508s directive instead of %s, or > 2) verify the snprintf return value is less than 512. Whoops. An off-by-one error. I meant to follow that by: > Of the two alternatives, (1) is the expected/recommended way to avoid both > the truncation and the warning. (2) is a possible enhancement that could > also be used to suppress the warning (along with changing the code).