In Location$InvokeLocation at line 613 there's this piece of code:

text=TypeHelper.parseMethodName(text);
signature = TypeHelper.parseMethodDescriptor(text);

This causes that method name only is parsed into text variable and then, when parsing the signature, this is already stripped from the text.

There's one more bug at line 589:

text = text.substring(0, tailIdx).trim();

The final parenthesis is not included which causes the signature parsing to fail as well.