Description Michael Rennie 2011-02-23 15:04:31 EST

Version: 3.7.0
Build id: I20110222-0800

When you create a new Ant-based project builder, you can specify that you want it to launch in the background on the Builder Options tab. Doing so, and having the option on the JRE to launch in the same JRE in the workspace results in the following exception when you try to build the project:

org.eclipse.core.runtime.CoreException: Ant build C:\Users\mrennie\workspaces\runtime-3.6.x\TestBuilders\builder.ant already in progress. Concurrent Ant builds are possible if you specify to build in a separate JRE.
at org.eclipse.ant.internal.launching.launchConfigurations.AntLaunchDelegate.launch(AntLaunchDelegate.java:172)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:853)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:702)
at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:695)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.launchBuild(ExternalToolBuilder.java:181)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.doBuildBasedOnScope(ExternalToolBuilder.java:169)
at org.eclipse.core.externaltools.internal.model.ExternalToolBuilder.build(ExternalToolBuilder.java:88)
at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:629)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:172)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:203)
at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:255)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:258)
at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:311)
at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:343)
at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:344)
at org.eclipse.ui.actions.GlobalBuildAction$1.run(GlobalBuildAction.java:179)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

Although it is considered bad form to make launch configuration tabs know about the settings on other tabs, it would be better to validate this combination of options rather than blow up during a build.