https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98444
Bug ID: 98444
Summary: [10 Regression] compile error with -ftracer and
-Werror=format-overflow
Product: gcc
Version: 10.2.1
URL: https://github.com/elogind/elogind/issues/189
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: tree-optimization
Assignee: unassigned at gcc dot gnu.org
Reporter: drfiemost at email dot it
Target Milestone: ---
Created attachment 49843
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=49843&action=edit
Preprocessed source
I get the following error compiling the attached code with gcc-10 (gcc version
10.2.1 20201205):
$ gcc -O2 -ftracer -Werror=format-overflow -c pam_elogind.i
../src/login/pam_elogind.c: In function ‘export_legacy_dbus_address’:
../src/login/pam_elogind.c:315:13: error: ‘%s’ directive argument is null
[-Werror=format-overflow=]
cc1: some warnings being treated as errors
According to upstream [1] the variable is asserted before calling the function
so it will never be null.
The code compiles fine with gcc-9 and even with gcc-10 when removing the
-ftracer flag.
I can't tell if it's a regression in gcc-10, just a false positive or what so
I'm reporting it here.
[1] https://github.com/elogind/elogind/issues/189
