https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83586
Bug ID: 83586
Summary: [8 regression] Invalid -Wformat-truncation on stdio2.h
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: sylvestre at debian dot org
CC: trippels at gcc dot gnu.org
Target Milestone: ---
/root/firefox-gcc-last/dom/gamepad/linux/LinuxGamepad.cpp: In member function
'void {anonymous}::LinuxGamepadService::AddDevice(mozilla::udev_device*)':
/root/firefox-gcc-last/dom/gamepad/linux/LinuxGamepad.cpp:87:1: error: '%s'
directive output may be truncated writing up to 127 bytes into a region of size
between 112 and 126 [-Werror=format-truncation=]
LinuxGamepadService::AddDevice(struct udev_device* dev)
^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/stdio.h:938,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/system_wrappers/stdio.h:3,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/nsTraceRefcnt.h:9,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Assertions.h:23,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/Casting.h:12,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/js/Value.h:13,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dist/include/mozilla/ErrorResult.h:31,
from /root/firefox-gcc-last/dom/gamepad/Gamepad.h:10,
from /root/firefox-gcc-last/dom/gamepad/Gamepad.cpp:7,
from
/root/firefox-gcc-last/obj-x86_64-pc-linux-gnu/dom/gamepad/Unified_cpp_dom_gamepad0.cpp:2:
/usr/include/x86_64-linux-gnu/bits/stdio2.h:64:35: note:
'__builtin___snprintf_chk' output 3 or more bytes (assuming 144) into a
destination of size 128
return __builtin___snprintf_chk (__s, __n, __USE_FORTIFY_LEVEL - 1,
~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
__bos (__s), __fmt, __va_arg_pack ());
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors
Not sure what is going on but we don't have this issue with gcc 7
