message: [Assembler] Decorate expression evaluate error with link request source line
diff: @@ -504,9 +504,16 @@ protected:
  if (symbolMap.count(symbol) == 0) {
  if (couldBeExpression(symbol)) {
  // No recorded symbol for the token; our last option is to try and evaluate a possible expression.
  - runOperation(evalRes, long, evaluate, symbol, &symbolMap);
  + auto evaluate_res = evaluate(symbol, &symbolMap);
  + try {
  + auto err = std::get<Error>(evaluate_res);
  + err.first = linkRequest.sourceLine;
  + errors.push_back(err);
  + continue;
  + } catch (const std::bad_variant_access&) {
  + }
  // Expression evaluated successfully
  - symbolValue = evalRes;
  + symbolValue = std::get<long>(evaluate_res);
  } else {
  errors.push_back(Error(linkRequest.sourceLine, "Unknown symbol '" + symbol + "'"));
  continue;
  