code: @SuppressWarnings("unchecked")
      private boolean hasExceptionOnStack() {
          try {
              for (int i = 0; i < (stack.getStackDepth() - 1); i++) {
                  OpcodeStack.Item item = stack.getStackItem(i);
                  String sig = item.getSignature();
                  if (sig.startsWith(Values.SIG_QUALIFIED_CLASS_PREFIX)) {
                      String name = SignatureUtils.stripSignature(sig);
                      JavaClass cls = Repository.lookupClass(name);
                      if (cls.instanceOf(throwableClass)) {
                          return true;
                      }
                  } else if (sig.startsWith(Values.SIG_ARRAY_PREFIX)) {
                      LOUserValue<Integer> uv = (LOUserValue<Integer>) item.getUserValue();
                      if ((uv != null) && (uv.getType() == LOUserValue.LOType.ARRAY_SIZE)) {
                          Integer sz = uv.getValue();
                          if ((sz != null) && (sz.intValue() < 0)) {
                              return true;
                          }
                      }
                  }
              }
              return false;
          } catch (ClassNotFoundException cnfe) {
              bugReporter.reportMissingClass(cnfe);
              return true;
          }
      }
docs: returns whether an exception object is on the stack slf4j will find this, and not include it in the parm list so i we find one, just don't report
  
  @return whether or not an exception i present