[Bug sanitizer/70746] New: UBSAN runtime fail: undefined symbol: __ubsan_handle_nonnull_arg

["ch3root at openwall dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70746

            Bug ID: 70746
           Summary: UBSAN runtime fail: undefined symbol:
                    __ubsan_handle_nonnull_arg
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: ch3root at openwall dot com
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
  Target Milestone: ---

$ cat fprintf-zero-ptr.c
#include <stdio.h>

int main()
{
  fprintf(0, "Hi\n");
}

$ gcc --version
gcc (GCC) 7.0.0 20160420 (experimental)
Copyright (C) 2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ gcc -fsanitize=undefined fprintf-zero-ptr.c && ./a.out 
./a.out: symbol lookup error: ./a.out: undefined symbol:
__ubsan_handle_nonnull_arg