CameraList.GetName(int Index) throws invalid pointer

[DrMistry]

Calling CameraList.GetName(int Index) causes an invalid pointer error. This occurs when using Camera.Detect() or invoking the method on an instantiated camera object. I can see no way to fix this within the wrapper - has there been a breaking change to the libgphoto2 code?

Output from console follows.

*** glibc detected *** mono: free(): invalid pointer: 0x73c5200c ***
Stacktrace:

at <0xffffffff>
at (wrapper managed-to-native) object.__icall_wrapper_mono_marshal_free (intptr) <0xffffffff>
at (wrapper managed-to-native) LibGPhoto2.CameraList.gp_list_get_name (System.Runtime.InteropServices.HandleRef,int,string&) <0xffffffff>
at LibGPhoto2.CameraList.GetName (int) <0x00043>
at Gphoto2.Camera.Detect () <0x00243>
at Pi2Hardware.ScreenTest.InitCamera () <0x0000f>
at Pi2Hardware.ScreenTest.Initialise () <0x00387>
at Pi2HardwareLibrary.RealtimeHardwareControl.Run () <0x00063>
at Pi2Hardware.MainClass.Main (string[]) <0x0003b>
at (wrapper runtime-invoke) .runtime_invoke_void_object (object,intptr,intptr,intptr) <0xffffffff>

Native stacktrace:

Debug info from gdb:

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/arm-linux-gnueabihf/libthread_db.so.1".
[New Thread 0x76a53440 (LWP 3927)]
0x76e54aac in waitpid () from /lib/arm-linux-gnueabihf/libpthread.so.0
Id Target Id Frame
2 Thread 0x76a53440 (LWP 3927) "Finalizer" 0x76e52770 in sem_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0

• 1 Thread 0x76f30000 (LWP 3926) "mono" 0x76e54aac in waitpid () from /lib/arm-linux-gnueabihf/libpthread.so.0

Thread 2 (Thread 0x76a53440 (LWP 3927)):
#0 0x76e52770 in sem_wait@@GLIBC_2.4 () from /lib/arm-linux-gnueabihf/libpthread.so.0
#1 0x001619b4 in mono_sem_wait ()
#2 0x0010edda in ?? ()
#3 0x0010edda in ?? ()

Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Thread 1 (Thread 0x76f30000 (LWP 3926)):
#0 0x76e54aac in waitpid () from /lib/arm-linux-gnueabihf/libpthread.so.0
#1 0x00087ff8 in ?? ()
#2 0x00087ff8 in ?? ()

Backtrace stopped: previous frame identical to this frame (corrupt stack?)

Got a SIGABRT while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries

used by your application.