[Bug other/116936] New: [UBSAN] gcc/diagnostic.cc: null pointer passed as argument

[pheeck at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116936

            Bug ID: 116936
           Summary: [UBSAN] gcc/diagnostic.cc: null pointer passed as
                    argument
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pheeck at gcc dot gnu.org
            Blocks: 63426
  Target Milestone: ---
              Host: x86_64-linux
            Target: x86_64-linux

Running an UBSAN-instrumented GCC (for example on the g++.dg/header.C GCC
testcase) results in

/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/diagnostic.cc:168:17:
runtime error: null pointer passed as argument 1, which is declared to never be
null
/home/worker/buildworker/tiber-gcc-ubsan/build/gcc/diagnostic.cc:171:17:
runtime error: null pointer passed as argument 1, which is declared to never be
null


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63426
[Bug 63426] [meta-bug] Issues found with -fsanitize=undefined