WALA: Nullpointerexception in JDTJava2CAstTranslator

Hello,

I’m trying to create a call graph but encounter a null pointer exception. Depending on the java source I use as input the exception is thrown from different visitors, but it always involves “n.resolveMethodBinding()”.

resolveMethodBinding returns null because it uses the class BindingResolver’s implementation (org.eclipse.jdt.core.dom package) (line 194):

    IMethodBinding resolveMethod(MethodInvocation method) {
        return null;
    }

It is likely that DefaultBindingResolver should be used instead of BindingResolver’s which features an empty implementation for each method.

The exact same issue was described by someone else here: https://sourceforge.net/p/wala/mailman/message/34746738/

Hope you have any clue how to solve this issue, as I’m using this tool for research done with regard to my thesis.

Best regards, Edward

About this issue

Original URL
State: open
Created 8 years ago
Reactions: 1
Comments: 52 (19 by maintainers)

Most upvoted comments

@edwardmp I am facing the same (original) problem that @msridhar posted in this thread. In fact, I am getting exactly the same stacktrace of the null pointer exception.

The problem, surprise surprise, is that resolveMethodBinding() is returning null. It is caused by the invocation of a method in a class in a JAR file included in my project. So far, I have tried the following solutions without success:

Made sure all Java standard libraries (including rt.jar) are included
Updated the Eclipse JDT libraries to the latest version (3.12 released in Feb 2017)
Tried with different versions of Java (7 and 8)
Set the ASTParser properties as suggested here

All other bindings seem to be working fine (even those with invocations of other methods in the same class) and I have no clue why this specific one is failing. Do you have any idea what might be causing it?

rizktouma on Sep 15, 2017