[Bug c/79969] New: C FE emits locus of forward enum declaration rather than definition into debug info

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79969

            Bug ID: 79969
           Summary: C FE emits locus of forward enum declaration rather
                    than definition into debug info
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

enum ENUMTAG;

enum ENUMTAG
{
  B = 1,
  C = 2
};

void
bar (void)
{
  enum ENUMTAG a = C;
}

The C FE emits DW_AT_decl_line 1 on the DW_TAG_enumerator_type rather than 3. 
The C++ FE with added say : int on line 1 and 3 uses line 3.