Steps to reproduce:
- create Welcome sample projecr
- modify source code by adding a class with a multiple inheritance:
class A{
    int a;
};
class B{
    int b;
};
class C : public A, 
        public B{
    
};
- create an instance of the class "C" in the main method like this:
C c;
-do step into, it stops in main()
-do step over
Result: Exception appears:
java.lang.StringIndexOutOfBoundsException: String index out of range: -1
	at java.lang.String.substring(String.java:1938)
	at org.netbeans.modules.cnd.debugger.gdb.GdbDebugger.getCSUFieldMap(GdbDebugger.java:728)
	at org.netbeans.modules.cnd.debugger.gdb.GdbDebugger.resultRecord(GdbDebugger.java:472)
	at org.netbeans.modules.cnd.debugger.gdb.proxy.GdbProxyEngine.processMessage(GdbProxyEngine.java:192)
	at org.netbeans.modules.cnd.debugger.gdb.proxy.GdbProxyEngine.access$000(GdbProxyEngine.java:49)
	at org.netbeans.modules.cnd.debugger.gdb.proxy.GdbProxyEngine$1.run(GdbProxyEngine.java:116)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:539)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:964)

If a user closes the exception window then does "Step Over" debugger gets unknown state. Only Stop and Pause buttons are
still active (Pause does not work). The debugging process can not be continued.