[Cdt-launch-inbox] [Bug 231149] New: One more NPE in AbstractCLaunchDele

[bugzilla-daemon@xxxxxxxxxxx]

https://bugs.eclipse.org/bugs/show_bug.cgi?id=231149  
Product/Component: CDT / cdt-launch
           Summary: One more NPE in AbstractCLaunchDelegate
           Product: CDT
           Version: 4.0.1
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: normal
          Priority: P3
         Component: cdt-launch
        AssignedTo: cdt-launch-inbox@xxxxxxxxxxx
        ReportedBy: achapiro@xxxxxxx


Created an attachment (id=99311)
 --> (https://bugs.eclipse.org/bugs/attachment.cgi?id=99311)
This is a patch

Build ID: 3.4M6

Steps To Reproduce:
1.Create two projects. 
2.Launch debug session from the first one using pull-down menu option Debug
As...
3.Then open Launch Configuration dialog
4. Duolicate configuration created for the first project and update it for the
second project.
5. Page to debugger tab back and forth or launch it.

You'll get NPE with such trace log:

java.lang.NullPointerException
        at
org.eclipse.cdt.launch.AbstractCLaunchDelegate.setBuildConfiguration(AbstractCLaunchDelegate.java:572)
        at
org.eclipse.cdt.launch.AbstractCLaunchDelegate.buildForLaunch(AbstractCLaunchDelegate.java:548)
        at
org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:732)
        at
org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:614)
        at
org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:827)
        at
org.eclipse.debug.internal.ui.DebugUIPlugin$7.run(DebugUIPlugin.java:1030)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)



More information:
Actually the cause of this bug is clear: when user duplicates configuration,
IDE also copies ICDTLaunchConfigurationConstants.ATTR_PROJECT_BUILD_CONFIG_ID
attribute. However, ICProjectDescription object is nothing to do with launch
configuration and of course it doesn't hold proper object
ICConfigurationDescription. 
The fixing is obvious: because we do not control duplication process, we just
should check if project description finds configuration description. 
I attach this micro-patch to this report.


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