Launching a VM twice causes a crash

[saagarjha]

If I launch a VM, stop it, then launch it again, the app will crash.

(lldb) bt
* thread #48, stop reason = signal SIGABRT
    frame #0: 0x000000018fa10df8 libsystem_kernel.dylib`__pthread_kill + 8
    frame #1: 0x000000018f9291e8 libsystem_pthread.dylib`pthread_kill$VARIANT$mp + 136
    frame #2: 0x000000018f87c644 libsystem_c.dylib`abort + 100
    frame #3: 0x000000010e7691cc libqemu-system-x86_64.dylib`type_new.cold.1 + 52
  * frame #4: 0x000000010e5eb2bc libqemu-system-x86_64.dylib`type_new(info=<unavailable>) at object.c:106:17 [opt]
    frame #5: 0x000000010e5e5c28 libqemu-system-x86_64.dylib`type_register [inlined] type_register_internal(info=<unavailable>) at object.c:137:10 [opt]
    frame #6: 0x000000010e5e5c24 libqemu-system-x86_64.dylib`type_register(info=<unavailable>) at object.c:146 [opt]
    frame #7: 0x000000010e6d18a4 libqemu-system-x86_64.dylib`module_call_init(type=<unavailable>) at module.c:97:9 [opt]
    frame #8: 0x000000010e4144ec libqemu-system-x86_64.dylib`qemu_main(argc=25, argv=0x000000016d77ae20, envp=<unavailable>) at vl.c:2878:5 [opt]
    frame #9: 0x00000001029db1ec UTM`start_qemu(args=0x0000000282e16370) at UTMQemu.m:38:14
    frame #10: 0x000000018f931d98 libsystem_pthread.dylib`_pthread_start + 156

It looks like it's re-registering a plugin or similar:

Registering `chardev-gdb' which already exists

[osy]

#6