code: @Override
  	public void unparseableExpression(Exception parseException, String exprName) {
  		reporter.error(prefix(exprName), "Could not parse regular expression: ", parseException.getMessage());
  	}
docs: /*
  (non-Javadoc)
  @see com.github.misberner.duzzt.DuzztDiagnosticListener#unparseableExpression(java.lang.Exception, java.lang.String)