[Bug debug/82489] New: UBSAN in gcc/dbxout.c:676:14: runtime error: negation of -9223372036854775808 cannot be represented in type 'long int'

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82489

            Bug ID: 82489
           Summary: UBSAN in gcc/dbxout.c:676:14: runtime error: negation
                    of -9223372036854775808 cannot be represented in type
                    'long int'
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: debug
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

With bootstrap-ubsan I can see:

$ ./xgcc -B.
/home/marxin/Programming/gcc2/gcc/testsuite/gcc.dg/debug/20000503-1.c -gstabs1
../../gcc/dbxout.c:676:14: runtime error: negation of -9223372036854775808
cannot be represented in type 'long int'; cast to an unsigned type to negate
this value to itself