System Preferences crashes after setting a slow down speed and clicking the lock

[jameswilson]

Just installed the application, I clicked the security lock to enter my admin password and unlock preferences and enable me to edit the settings. I set my speed limit to 384k and then clicked the lock again to lock system preferences. Immediately upon clicking the lock, System Preferences crashes with the following error message in the stack trace:

com.mdimension.SpeedLimit v.1.0 (SpeedLimit)
objc[24987]: GC: forcing GC OFF because OBJC_DISABLE_GC is set
Performing @selector(buttonPressed:) from sender SFAnimatedLockButton 0x7fba1bcf2cf0
abort() called
*** error for object 0x7fba1bcea150: pointer being freed was not allocated

Process:         System Preferences [24987]
Path:            /Applications/System Preferences.app/Contents/MacOS/System Preferences
Identifier:      com.apple.systempreferences
Version:         13.0 (13.0)
Build Info:      SystemPrefsApp-259001000000000~1
Code Type:       X86-64 (Native)
Parent Process:  launchd [280]
Responsible:     System Preferences [24987]
User ID:         501

Date/Time:       2014-09-02 10:19:57.947 -0400
OS Version:      Mac OS X 10.9.4 (13E28)

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   libsystem_kernel.dylib          0x00007fff846fb866 __pthread_kill + 10
1   libsystem_pthread.dylib         0x00007fff8f36a35c pthread_kill + 92
2   libsystem_c.dylib               0x00007fff888f3b1a abort + 125
3   libsystem_malloc.dylib          0x00007fff8b2e807f free + 411
4   com.apple.security              0x00007fff8b7dfa49 AuthorizationFree + 198
5   com.apple.securityfoundation    0x00007fff84a22dcd -[SFAuthorization invalidateCredentials:] + 41
6   com.apple.securityinterface     0x00007fff84712dde -[SFAuthorizationView(Private) _freeRef:] + 121
7   com.apple.securityinterface     0x00007fff847123a0 -[SFAuthorizationView(Private) _tryState:interactive:] + 1666
8   com.apple.securityinterface     0x00007fff84714068 __37-[SFAuthorizationView buttonPressed:]_block_invoke + 66
9   com.apple.securityinterface     0x00007fff8471401d -[SFAuthorizationView buttonPressed:] + 285
10  com.apple.AppKit                0x00007fff8d449260 -[NSApplication sendAction:to:from:] + 327
11  com.apple.AppKit                0x00007fff8d4490de -[NSControl sendAction:to:] + 86
12  com.apple.AppKit                0x00007fff8d495c4d -[NSCell _sendActionFrom:] + 128
13  com.apple.AppKit                0x00007fff8d4af655 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 2316
14  com.apple.AppKit                0x00007fff8d4aea27 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 487
15  com.apple.AppKit                0x00007fff8d4ae13d -[NSControl mouseDown:] + 706
16  com.apple.AppKit                0x00007fff8d42fa58 -[NSWindow sendEvent:] + 11296
17  com.apple.systempreferences     0x000000010c6cda61 0x10c6c6000 + 31329
18  com.apple.AppKit                0x00007fff8d3ce5d4 -[NSApplication sendEvent:] + 2021
19  com.apple.systempreferences     0x000000010c6cceb4 0x10c6c6000 + 28340
20  com.apple.AppKit                0x00007fff8d21e9f9 -[NSApplication run] + 646
21  com.apple.AppKit                0x00007fff8d209783 NSApplicationMain + 940
22  libdyld.dylib                   0x00007fff8b2d65fd start + 1