[X10-users] Null Pointer Exception in X10DT Development set up.

[Anchu R S <an...@gm...>]

Hi All,

I am trying to set up Eclipse development environment to build and debug
X10DT. I followed the steps in [1] and could successfully complete till
Part 3 (All projects are now built successfully and do not show any
errors). However when I try to execute Hello.x10 within the newly created
X10DT Eclipse application I get a null pointer exception. Following is the
error log.


!ENTRY org.eclipse.core.jobs 4 2 2017-03-19 13:20:40.526
!MESSAGE An internal error occurred during: "Launching Hello1".
!STACK 0
java.lang.NullPointerException
    at org.eclipse.core.internal.runtime.Activator.getURLConverter
(Activator.java:321)
    at org.eclipse.core.runtime.FileLocator.resolve(FileLocator.java:227)
    at x10dt.core.utils
.X10BundleUtils.getX10DistHostResource(X10BundleUtils.java:99)
    at x10dt.ui
.launch.java.launching.X10LocalLaunchConfigDelegate.getX10DistHostLibDir(X10LocalLaunchConfigDelegate.java:50)
    at x10dt.ui
.launch.java.launching.X10LaunchConfigurationDelegate.getX10DistributionFolder(X10LaunchConfigurationDelegate.java:606)
    at x10dt.ui.launch.java.launching.X10LaunchConfigurationDelegate.
runCommand(X10LaunchConfigurationDelegate.java:197)
    at x10dt.ui
.launch.java.launching.X10LaunchConfigurationDelegate.launch(X10LaunchConfigurationDelegate.java:111)
    at org.eclipse.debug.internal.core.LaunchConfiguration.launch(
LaunchConfiguration.java:885)
    at org.eclipse.debug.internal.core.LaunchConfiguration.launch(
LaunchConfiguration.java:739)
    at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(
DebugUIPlugin.java:1039)
    at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin
.java:1256)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)


A preliminary search in google says that it was a known bug in Eclipse,
which got fixed in some version of Eclipse. The documentation in [1]
insists on using eclipse 4.4.2, so I have not tried it with an newer
version of eclipse.

It will be a great help if someone could guide me to resolve this issue.

The versions of various tools used are listed below.

Java - 1.7
Eclipse - 4.4.2
SWTBot - 2.2.1
PDE and PTP were installed directly from Eclipse software update.

[1] http://x10-lang.org/articles/169.html

Regards,
-- 
*Anchu R S*

*MS Research Scholar*

*IIT Madras*