Empty output when calculating metrics for this function in C #1006

static YYACTIONTYPE
yy_find_shift_action(YYCODETYPE iLookAhead, /* The look-ahead token */
                     YYACTIONTYPE stateno   /* Current state number */
) {
  int i;

  if (stateno > YY_MAX_SHIFT)
    return stateno;
  assert(stateno <= YY_SHIFT_COUNT);
#if defined(YYCOVERAGE)
  yycoverage[stateno][iLookAhead] = 1;
#endif
  do {
    i = yy_shift_ofst[stateno];
    assert(i >= 0);
    /* assert( i+YYNTOKEN<=(int)YY_NLOOKAHEAD ); */
    assert(iLookAhead != YYNOCODE);
    assert(iLookAhead < YYNTOKEN);
    i += iLookAhead;
    if (i >= YY_NLOOKAHEAD || yy_lookahead[i] != iLookAhead) {
#ifdef YYFALLBACK
      YYCODETYPE iFallback; /* Fallback token */
      if (iLookAhead < sizeof(yyFallback) / sizeof(yyFallback[0]) &&
          (iFallback = yyFallback[iLookAhead]) != 0) {
#ifndef NDEBUG
        if (yyTraceFILE) {
          fprintf(yyTraceFILE, "%sFALLBACK %s => %s\n", yyTracePrompt,
                  yyTokenName[iLookAhead], yyTokenName[iFallback]);
        }
#endif
        assert(yyFallback[iFallback] == 0); /* Fallback loop must terminate */
        iLookAhead = iFallback;
        continue;
      }
#endif
#ifdef YYWILDCARD
      {
        int j = i - iLookAhead + YYWILDCARD;
        if (
#if YY_SHIFT_MIN + YYWILDCARD < 0
            j >= 0 &&
#endif
#if YY_SHIFT_MAX + YYWILDCARD >= YY_ACTTAB_COUNT
            j < YY_ACTTAB_COUNT &&
#endif
            j < (int)(sizeof(yy_lookahead) / sizeof(yy_lookahead[0])) &&
            yy_lookahead[j] == YYWILDCARD && iLookAhead > 0) {
#ifndef NDEBUG
          if (yyTraceFILE) {
            fprintf(yyTraceFILE, "%sWILDCARD %s => %s\n", yyTracePrompt,
                    yyTokenName[iLookAhead], yyTokenName[YYWILDCARD]);
          }
#endif /* NDEBUG */
          return yy_action[j];
        }
      }
#endif /* YYWILDCARD */
      return yy_default[stateno];
    } else {
      return yy_action[i];
    }
  } while (1);
}