Debuggers are given 2 chances to handle an exception of the program being debugged. When an exception occurs, the execution of the program will stop and the debugger is given a first chance to handle the exception. The debugger can handle it or choose to pass it on to the program. In the latter, the program registered exception handler will be given control.
If the program does not handle the exception, the debugger is given a second chance to handle the exception. If there is no debugger attached, the program will usually crash at this point. The debugger must resolve the exception to enable the program to continue to run.
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