PVS-Studio warning V519 for V8

void RBBIRuleScanner::error(UErrorCode e) {
  if (U_SUCCESS(*fRB->fStatus)) {
    *fRB->fStatus = e;
    if (fRB->fParseError) {
      fRB->fParseError->line  = fLineNum;
      fRB->fParseError->offset = fCharNum;
      fRB->fParseError->preContext[0] = 0;
      fRB->fParseError->preContext[0] = 0;
    }
  }
}

This suspicious code was found in V8 project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'fRB->fParseError->preContext[0]' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 582, 583. rbbiscan.cpp 583

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