message: require enabling string view population before looking up the file origin
diff: @@ -298,6 +298,8 @@ void VerilogProject::AddVirtualFile(absl::string_view resolved_filename,
  const VerilogSourceFile* VerilogProject::LookupFileOrigin(
  absl::string_view content_substring) const {
  + CHECK(populate_string_maps_)
  + << "Populating string maps must be enabled for LookupFileOrigin!";
  // Look for corresponding source text (superstring) buffer start.
  const auto found_superstring = string_view_map_.find(content_substring);
  if (found_superstring == string_view_map_.end()) return nullptr;
  