[Bug gcov-profile/127408] New: gcc/gcov.cc:3424:23: warning: logical ‘and’ of mutually exclusive tests is always false [-Wlogical-op]

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=127408

            Bug ID: 127408
           Summary: gcc/gcov.cc:3424:23: warning: logical ‘and’ of
                    mutually exclusive tests is always false
                    [-Wlogical-op]
           Product: gcc
           Version: 17.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: gcov-profile
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dcb314 at hotmail dot com
  Target Milestone: ---

Use of warning flag -Wlogical-op on a build produces
the warning message in the title.

The source code is

  if (coverage->calls && coverage->calls == 0)

git blame says:

f6a1e69999d7 gcc/gcov.cc (Jørgen Kvalsvik   2025-09-30 11:23:56 +0200 3424)  
if (coverage->calls && coverage->calls == 0)

This is yet another example where putting -Wlogical-op
into -Wall would have caught the problem earlier.