https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110172
Xi Ruoyao <xry111 at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |xry111 at gcc dot gnu.org --- Comment #2 from Xi Ruoyao <xry111 at gcc dot gnu.org> --- According to https://www.gnu.org/software/libc/manual/html_node/Registering-New-Conversions.html, people may custom vfprintf with printf_function. If the printf_function is implemented in C++ and throws, then yes there is indeed a leak. So the warning is not so false with Glibc.