[Bug 235422] New: Crash on closing kdevelop with running debug session

[Niko Sams]

This crash happens because ICore::self() is 0 during shutdown:

> Thread 1 (Thread 0x7f15aa453760 (LWP 17910)):
> [KCrash Handler]
> #5  0x00007f15a2d58f39 in KDevelop::IVariableController::variableCollection
> (this=<value optimized out>) at
> /home/gpiez/src/kdevplatform/debugger/interfaces/ivariablecontroller.cpp:41
> #6  0x00007f15a2d58fe8 in KDevelop::IVariableController::handleEvent
> (this=0x14ea350, event=<value optimized out>) at
> /home/gpiez/src/kdevplatform/debugger/interfaces/ivariablecontroller.cpp:88
> #7  0x00007f158dc804b8 in GDBDebugger::VariableController::handleEvent
> (this=0x14ea350, event=KDevelop::IDebugSession::program_state_changed)
>    at /home/gpiez/src/kdevelop/debuggers/gdb/variablecontroller.cpp:242
> #8  0x00007f15a2d552df in KDevelop::IDebugSession::raiseEvent (this=0x3881e80,
> e=KDevelop::IDebugSession::thread_or_frame_changed)
>    at /home/gpiez/src/kdevplatform/debugger/interfaces/idebugsession.cpp:75
> #9  0x00007f158dc74618 in GDBDebugger::DebugSession::raiseEvent
> (this=0x3881e80, e=KDevelop::IDebugSession::program_state_changed) at
> /home/gpiez/src/kdevelop/debuggers/gdb/debugsession.cpp:1255

What's the best way to work around this?
adding if(ICore:.self()) everywhere is error-prone. (can be easily forgotten)

Niko