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Bug 189782

Summary:	NPE in SourceTypeBinding.resolveTypesFor
Product:	[Eclipse Project] JDT	Reporter:	John Arthorne <john.arthorne>
Component:	Core	Assignee:	Satyam Kandula <satyam.kandula>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	normal
Priority:	P3	CC:	amj87.iitr, byron, Olivier_Thomann, srikanth_sankaran
Version:	3.3
Target Milestone:	---
Hardware:	PC
OS:	Windows Vista
Whiteboard:	stalebug

Description John Arthorne

2007-05-29 16:51:26 EDT

Build: I20070529-0010

org.eclipse.core.tools plugin has a utility called "Find Unreferenced Members" that walks over a java project/package/class, and searches for references to each method and field. When I run this on org.eclipse.core.resources, I get about 6 of the following stack traces in my log. Here is the steps:

1) Checkout org.eclipse.core.tools from HEAD
2) Use PDE export to create a binary plugin.
3) Shutdown, install the new plugin, restart with -clean
4) Checkout org.eclipse.core.resources from HEAD
5) Right click on project, "Find Unreferenced Members" from context menu

Here is the stack:

!ENTRY org.eclipse.jdt.core 4 4 2007-05-29 16:26:50.916
!MESSAGE Could not retrieve declared methods
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.resolveTypesFor(SourceTypeBinding.java(Compiled Code))
	at org.eclipse.jdt.internal.compiler.lookup.SourceTypeBinding.methods(SourceTypeBinding.java(Compiled Code))
	at org.eclipse.jdt.internal.compiler.lookup.ReferenceBinding.availableMethods(ReferenceBinding.java:174)
	at org.eclipse.jdt.core.dom.TypeBinding.getDeclaredMethods(TypeBinding.java(Compiled Code))
	at org.eclipse.jdt.internal.corext.dom.Bindings.findOverriddenMethodInType(Bindings.java(Compiled Code))
	at org.eclipse.jdt.internal.corext.dom.Bindings.findOverriddenMethodInHierarchy(Bindings.java:441)
	at org.eclipse.jdt.internal.corext.dom.Bindings.findOverriddenMethodInHierarchy(Bindings.java:452)
	at org.eclipse.jdt.internal.corext.dom.Bindings.findOverriddenMethod(Bindings.java:475)
	at org.eclipse.core.tools.search.FindUnusedMembers.methodOverrides(FindUnusedMembers.java:124)
	at org.eclipse.core.tools.search.FindUnusedMembers.doSearchType(FindUnusedMembers.java:139)
	at org.eclipse.core.tools.search.FindUnusedMembers.doSearchCU(FindUnusedMembers.java:116)
	at org.eclipse.core.tools.search.FindUnusedMembers.process(FindUnusedMembers.java:207)
	at org.eclipse.core.tools.search.FindUnusedSearchQuery.run(FindUnusedSearchQuery.java:68)
	at org.eclipse.search2.internal.ui.InternalSearchUI$InternalSearchJob.run(InternalSearchUI.java:94)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Comment 1 John Arthorne

2007-05-29 16:54:39 EDT

I just noticed that it's using an internal class (Martin actually contributed this). Feel free to mark invalid if I'm doing something illegal here.

Comment 2 Olivier Thomann

2007-05-29 22:04:35 EDT

This is another case when walking the binding hierarchy and trying to resolve more bindings that were not resolved before the scopes were flushed.

Comment 3 Philipe Mulet

2007-05-30 07:25:19 EDT

Olivier - isn't this a case where the scopes shouldn't have been flushed already ? (i.e. not resetting the context)

Comment 4 Olivier Thomann

2007-05-30 11:00:04 EDT

I guess yes. The scope should still be there for further resolution, but this is not the case.

Comment 5 Olivier Thomann

2010-11-09 09:38:59 EST

Satyam, this might be related to your actual investigation of improving binding handling.

Comment 6 Satyam Kandula

2010-11-11 06:33:53 EST

This still fails with my current implementation too. We should probably process the CU when we run into this mode. Need to find if we could safely do this. Do you have any other ideas?

Comment 7 Satyam Kandula

2011-09-30 07:10:39 EDT

*** Bug 359478 has been marked as a duplicate of this bug. ***

Comment 8 Satyam Kandula

2012-03-06 06:25:01 EST

*** Bug 359478 has been marked as a duplicate of this bug. ***

Comment 9 Eclipse Genie

2020-03-07 17:37:06 EST

This bug hasn't had any activity in quite some time. Maybe the problem got resolved, was a duplicate of something else, or became less pressing for some reason - or maybe it's still relevant but just hasn't been looked at yet. As such, we're closing this bug.

If you have further information on the current state of the bug, please add it and reopen this bug. The information can be, for example, that the problem still occurs, that you still want the feature, that more information is needed, or that the bug is (for whatever reason) no longer relevant.

--
The automated Eclipse Genie.