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An exception is thrown when a user tries to install the first module that depends on module "debuggercore". Here are the steps I made: No module that would depend on debuggercore was installed after startup. 1) Invoke Setup Wizard from menu (Tools - Setup Wizard). 2) Click the button "Next". 3) Turn on module "Applet" and click the button "Finish". An exception is thrown:java.lang.SecurityException: Second default DebuggerImpl can not be set! at org.netbeans.modules.debugger.Register.setDebuggerCoreImpl(Register.java:61) ... (see the attachment for full exception stack trace)
Created attachment 2230 [details] exception stack trace
The bug seems to be related to the module "Applet". I also tried to install module "RMI" and it did not cause any exception.
*** This issue has been marked as a duplicate of 11570 ***
Duplicate -> Closed.