Bug 5781

Summary:	NPE using new image builder
Product:	[Eclipse Project] JDT	Reporter:	Erich Gamma <erich_gamma>
Component:	Core	Assignee:	Philipe Mulet <philippe_mulet>
Status:	RESOLVED FIXED	QA Contact:
Severity:	normal
Priority:	P3	CC:	kent_johnson
Version:	2.0
Target Milestone:	2.0 M1
Hardware:	PC
OS:	Windows 2000
Whiteboard:

Description Erich Gamma

2001-11-12 05:10:03 EST

Did a full build of my self hosting workspace.
At the end during the "updateing" progress stage I got 2 NullPointer exceptions

java.lang.NullPointerException
	at 
org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.initializeBuilder
(JavaBuilder.java:265)
	at org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.build
(JavaBuilder.java:47)
	at org.eclipse.core.internal.events.BuildManager$2.run
(BuildManager.java:356)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:114)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:179)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:189)
	at org.eclipse.core.internal.events.BuildManager$1.run
(BuildManager.java:138)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:152)
	at org.eclipse.core.internal.events.BuildManager.build
(BuildManager.java:214)
	at org.eclipse.core.internal.resources.Workspace.build
(Workspace.java:119)
	at org.eclipse.ui.internal.GlobalBuildAction.build
(GlobalBuildAction.java:59)
	at org.eclipse.ui.internal.GlobalBuildAction$1.run
(GlobalBuildAction.java:143)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run
(ModalContext.java:98)
Log: Mon Nov 12 11:17:41 EST 2001
2 org.eclipse.core.resources 2 Problems occurred when invoking code from plug-
in: org.eclipse.core.resources.
java.lang.NullPointerException
	at 
org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.initializeBuilder
(JavaBuilder.java:270)
	at org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.build
(JavaBuilder.java:47)
	at org.eclipse.core.internal.events.BuildManager$2.run
(BuildManager.java:356)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:114)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:179)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:189)
	at org.eclipse.core.internal.events.BuildManager$1.run
(BuildManager.java:138)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:152)
	at org.eclipse.core.internal.events.BuildManager.build
(BuildManager.java:214)
	at org.eclipse.core.internal.resources.Workspace.build
(Workspace.java:119)
	at org.eclipse.ui.internal.GlobalBuildAction.build
(GlobalBuildAction.java:59)
	at org.eclipse.ui.internal.GlobalBuildAction$1.run
(GlobalBuildAction.java:143)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run
(ModalContext.java:98)

Comment 1 Philipe Mulet

2001-11-12 07:11:20 EST

Crash indicates that there would be a missing source folder on the project's 
buildpath. Do you confirm this ?

Comment 2 Erich Gamma

2001-11-12 08:09:02 EST

There is one required project that is missing on the build path.
There is no missing source folder.
I'll try again with the missing required project loaded.

Comment 3 Erich Gamma

2001-11-12 08:16:25 EST

it works once I removed the project with non-existing pre-req project.

Comment 4 Philipe Mulet

2001-11-12 10:25:22 EST

Using the new builder, I got a similar stack traces (running on jdk1.3):

java.lang.NullPointerException
	at org.eclipse.jdt.internal.core.util.LookupTable.put
(LookupTable.java:290)
	at 
org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.initializeBuilder
(JavaBuilder.java:274)
	at org.eclipse.jdt.internal.core.newbuilder.JavaBuilder.build
(JavaBuilder.java:47)
	at org.eclipse.core.internal.events.BuildManager$2.run
(BuildManager.java:356)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:114)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:179)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:189)
	at org.eclipse.core.internal.events.BuildManager$1.run
(BuildManager.java:138)
	at org.eclipse.core.internal.runtime.InternalPlatform.run
(InternalPlatform.java:812)
	at org.eclipse.core.runtime.Platform.run(Platform.java:395)
	at org.eclipse.core.internal.events.BuildManager.basicBuild
(BuildManager.java:152)
	at org.eclipse.core.internal.events.BuildManager.build
(BuildManager.java:214)
	at org.eclipse.core.internal.resources.Workspace.build
(Workspace.java:119)
	at org.eclipse.ui.internal.GlobalBuildAction.build
(GlobalBuildAction.java:59)
	at org.eclipse.ui.internal.GlobalBuildAction$1.run
(GlobalBuildAction.java:143)
	at org.eclipse.jface.operation.ModalContext$ModalContextThread.run
(ModalContext.java:98)

Comment 5 Philipe Mulet

2001-11-12 10:26:25 EST

The builder classpath computation code did not protect itself for missing/non-
existing classpath (also against ill-formed classpath).

Added protection. Fixed.