JDK-6352136 : TypeMirror.asElement().getEnclosedElements() throws NPE
  • Type: Bug
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 6
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2005-11-17
  • Updated: 2010-04-02
  • Resolved: 2006-03-04
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JDK 6
6 b75Fixed
Related Reports
Relates :  
JDK-6375016 - Elements.getTypeElement() sometimes returns null.
Relates :  
JDK-6374357 - PackageElement.getEnclosedElements() throws ClassReader$BadClassFileException
Relates :  
JDK-6389414 - ExecutableType.asElement should return null
Description
Simple code below results in NullPointerException
 static class typekindVisitor extends TypeKindVisitor6<Boolean, Void> {
 	public Boolean defaultAction(TypeMirror tm, Void v) {
 	  List<? extends Element> le = tm.asElement().getEnclosedElements(); //<<--NPE
	  for(Element e : le ) e.asType().accept(new typekindVisitor(), null);
	   tm.accept( new typekindVisitor(), null);
	   return true;
	}
}
Comments
SUGGESTED FIX Webrev of changes: http://sa.sfbay/projects/langtools/bugid_summary.pl?bugid=6374357
24-02-2006
EVALUATION At some point the test program takes an ExecutableElement, calls asType() to get an ExecutableType, and later calls asElement() on that ExecutableType. The ExecutableType instance does not have a usable tsym value set: the second call always returns the same stub instance (named "Method"). This stub instance should never be returned to an external caller. Once the program tries to operate on it, treating it as a normal ExecutableElement, it is doomed.
17-12-2005
EVALUATION Sample code doesn't compile. What is tm?
17-11-2005