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This bug was originally marked as duplicate of bug 212072, 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 Beta (Build 201508041349) VM: Java HotSpot(TM) 64-Bit Server VM, 25.60-b23, Java(TM) SE Runtime Environment, 1.8.0_60-b27 OS: Linux User Comments: GUEST: bbb GUEST: aaa Stacktrace: java.lang.NumberFormatException: For input string: "WatchType" at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) at java.lang.Integer.parseInt(Integer.java:580) at java.lang.Integer.parseInt(Integer.java:615) at java.text.MessageFormat.makeFormat(MessageFormat.java:1427) at java.text.MessageFormat.applyPattern(MessageFormat.java:479) at java.text.MessageFormat.<init>(MessageFormat.java:362)
Created attachment 156655 [details] stacktrace
Probably occurred after the user selected "View as -> Tree" in Variables window. But I'm not able to reproduce, no exception is thrown for me. Some specific steps to reproduce will help...