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This bug was originally marked as duplicate of bug 113518, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) Client VM, 25.102-b14, Java(TM) SE Runtime Environment, 1.8.0_102-b14 OS: Windows 10 User Comments: matvei: Creating a generic Comparator. Here's the code snippet, caret position indicated by "|": private static final Comparator<MinimumDetailsInfo> sorter = Comparator .comparing|(mdi -> mdi.getCategorySpeed()); As soon as I typed in "<>", the exception popped up. If I do any other editing on that line of code, another identical exception is thrown by the IDE. If I try to save the file, IDE deadlocks while maxing one of the CPU cores. Stacktrace: java.lang.NullPointerException at com.sun.tools.javac.comp.Attr.visitVarDef(Attr.java:1054) at com.sun.tools.javac.tree.JCTree$JCVariableDecl.accept(JCTree.java:858) at com.sun.tools.javac.comp.Attr.attribTree(Attr.java:572) at com.sun.tools.javac.comp.Attr.attribStat(Attr.java:641) at com.sun.tools.javac.comp.Attr.attribStats(Attr.java:657) at com.sun.tools.javac.comp.Attr.visitLambda(Attr.java:2452)
Created attachment 162142 [details] stacktrace