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This bug was originally marked as duplicate of bug 180164, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 7.1 RC2 (Build 201111302200) VM: Java HotSpot(TM) Client VM, 20.4-b02-402, Java(TM) SE Runtime Environment, 1.6.0_29-b11-402-10M3527 OS: Mac OS X User Comments: michbarsinai: Working on implementation methods of enums that have abstract methods. GUEST: copying some code Stacktrace: java.lang.NullPointerException: The treePath parameter cannot be null at org.openide.util.Parameters.notNull(Parameters.java:89) at org.netbeans.api.java.source.TreePathHandle.create(TreePathHandle.java:215) at org.netbeans.modules.java.hints.introduce.IntroduceHint.computeIntroduceMethod(IntroduceHint.java:664) at org.netbeans.modules.java.hints.introduce.IntroduceHint.computeError(IntroduceHint.java:540) at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:359) at org.netbeans.modules.java.hints.introduce.IntroduceHint.run(IntroduceHint.java:157)
Created attachment 114423 [details] stacktrace
This bug already has 5 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=183981
Created attachment 119796 [details] stacktrace Commenting Java code using CTRL + /
Created attachment 121026 [details] stacktrace
This bug already has 10 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=183981
Created attachment 124971 [details] stacktrace
Created attachment 137007 [details] stacktrace I was copy/pasting some codes but I don't think that there is any relationship with the troubleshooting.
This bug already has 20 duplicates see http://statistics.netbeans.org/exceptions/detail.do?id=183981
Created attachment 137701 [details] stacktrace Hilighted some code
Integrated into 'main-silver', will be available in build *201308022300* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress) Changeset: http://hg.netbeans.org/main-silver/rev/3d8906295d28 User: Jan Lahoda <jlahoda@netbeans.org> Log: #206660: shadow Enter.typeEnvs for all non-source Tree attributions.