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I don't know when was set Compiler of java sources to default. After change type of compiler compilation was done without problems. It is better check compiler type before compilation. Exception StackTrace: java.lang.NullPointerException at org.openide.loaders.CompilerSupport.addToJob(CompilerSupport.java:74) at org.openide.actions.AbstractCompileAction.createJob(AbstractCompileAction.java:189) at org.openide.actions.AbstractCompileAction$1.run(AbstractCompileAction.java:112) at org.openide.actions.AbstractCompileAction.compileNodes(AbstractCompileAction.java:138) at org.openide.actions.AbstractCompileAction.performAction(AbstractCompileAction.java:49) at org.openide.util.actions.NodeAction.performAction(NodeAction.java:93) at org.openide.util.actions.NodeAction.actionPerformed(NodeAction.java:84) at org.netbeans.core.ModuleActions$1.run(ModuleActions.java:67) at org.openide.util.Task.run(Task.java:124) at org.openide.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:562) org.openide.util.RequestProcessor$Holder(task org.netbeans.core.ModuleActions$1@16032 [-218, 1]) at org.openide.util.RequestProcessor$Task.createHolder(RequestProcessor.java:275) at org.openide.util.RequestProcessor.post(RequestProcessor.java:99) at org.openide.util.RequestProcessor.post(RequestProcessor.java:72) at org.netbeans.core.ModuleActions.invokeAction(ModuleActions.java:65) at org.netbeans.core.windows.MultiTabContainer$FocusMan.processKeyStroke(MultiTabContainer.java:1385) at org.netbeans.core.windows.MultiTabContainer$3.run(MultiTabContainer.java:1339) at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:154) at java.awt.EventQueue.dispatchEvent(EventQueue.java:331) at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java:103) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) [catch] at java.awt.EventDispatchThread.run(EventDispatchThread.java:84)
I bet you have installed a new build with no symlink to the fastjavac so it was removed from Compiler Types during startup although still set as Default Compiler. Similar bug is being solved as #8759
I could not reproduce the problem; it is possible that there was some bug, but was fixed when solving other problems. Please reopen the bug, if you encounter the behaviour again.
verified.
Resolved for 3.4.x or earlier, no new info since then -> closing.