I have the following property that I am binding:
@property (nonatomic, readwrite, retain) NSArray* activeTasks;
That I bind with the following code:
[Export("activeTasks", ArgumentSemantic.Retain)]
NSDictionary[] ActiveTasks { get; }
I use this property very often. Nevertheless, once every thousand of accesses, I get a SIGSEGV on get_activeTasks (the binding of the selector). I wonder what I am doing wrong and why this only happens very rarely instead of systematically.
at (wrapper managed-to-native) MonoTouch.ObjCRuntime.Messaging.void_objc_msgSend (intptr,intptr) <IL 0x00024, 0xffffffff>
at MonoTouch.Foundation.NSObject.InitializeObject (bool) [0x00062] in /Developer/MonoTouch/Source/monotouch/src/Foundation/NSObject.cs:136
at MonoTouch.Foundation.NSObject..ctor (intptr,bool) [0x0000d] in /Developer/MonoTouch/Source/monotouch/src/Foundation/NSObject.cs:62
at MonoTouch.Foundation.NSObject..ctor (intptr) <IL 0x00003, 0x0002b>
at MonoTouch.Foundation.NSDictionary..ctor (intptr) <IL 0x00002, 0x00027>
at MonoTouch.Foundation.NSMutableDictionary..ctor (intptr) <IL 0x00002, 0x00027>
at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___intptr (object,intptr,intptr,intptr) <IL 0x00054, 0xffffffff>
at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&) <IL 0x00030, 0xffffffff>
at System.Reflection.MonoCMethod.Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) [0x00109] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:536
at System.Reflection.MonoCMethod.Invoke (System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:551
at System.Activator.CreateInstance (System.Type,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo,object[]) [0x00174] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System/Activator.cs:299
at System.Activator.CreateInstance (System.Type,object[],object[]) [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System/Activator.cs:234
at System.Activator.CreateInstance (System.Type,object[]) [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System/Activator.cs:229
at MonoTouch.ObjCRuntime.Runtime.ConstructNSObject (intptr,intptr) [0x0000d] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:210
at MonoTouch.ObjCRuntime.Runtime.GetNSObject (intptr) [0x0001f] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:259
at MonoTouch.Foundation.NSArray.ArrayFromHandle<T> (intptr) [0x0003a] in /Developer/MonoTouch/Source/monotouch/src/shared/Foundation/NSArray.cs:172
at TouchDBBinding.CouchServer.get_ActiveTasks () <IL 0x0001b, 0x00073>
EDIT:
Here is an update stack trace using the new Framework, I don't know if it could help out more:
Stacktrace:
at (wrapper managed-to-native) MonoTouch.Foundation.NSObject.monotouch_create_managed_ref (intptr,intptr,bool) <IL 0x0002d, 0xffffffff>
at MonoTouch.Foundation.NSObject.CreateManagedRef (bool) [0x00000] in /Developer/MonoTouch/Source/monotouch/src/Foundation/NSObject.cs:93
at MonoTouch.Foundation.NSObject.InitializeObject (bool) [0x000cc] in /Developer/MonoTouch/Source/monotouch/src/Foundation/NSObject.cs:88
at MonoTouch.Foundation.NSObject..ctor (intptr,bool) [0x0000d] in /Developer/MonoTouch/Source/monotouch/src/shared/Foundation/NSObject2.cs:85
at MonoTouch.Foundation.NSObject..ctor (intptr) <IL 0x00003, 0x0002b>
at MonoTouch.Foundation.NSDictionary..ctor (intptr) <IL 0x00002, 0x00027>
at MonoTouch.Foundation.NSMutableDictionary..ctor (intptr) <IL 0x00002, 0x00027>
at (wrapper runtime-invoke) <Module>.runtime_invoke_void__this___intptr (object,intptr,intptr,intptr) <IL 0x00054, 0xffffffff>
at (wrapper managed-to-native) System.Reflection.MonoCMethod.InternalInvoke (System.Reflection.MonoCMethod,object,object[],System.Exception&) <IL 0x00030, 0xffffffff>
at System.Reflection.MonoCMethod.Invoke (object,System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) [0x00109] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:530
at System.Reflection.MonoCMethod.Invoke (System.Reflection.BindingFlags,System.Reflection.Binder,object[],System.Globalization.CultureInfo) [0x00000] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:545
at System.Reflection.ConstructorInfo.Invoke (object[]) [0x0000e] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/ConstructorInfo.cs:62
at MonoTouch.ObjCRuntime.Runtime.ConstructNSObject (intptr,intptr) [0x00051] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:269
at MonoTouch.ObjCRuntime.Runtime.GetNSObject (intptr) [0x0001f] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/Runtime.cs:328
at MonoTouch.Foundation.NSArray.ArrayFromHandle<T> (intptr) [0x00044] in /Developer/MonoTouch/Source/monotouch/src/shared/Foundation/NSArray.cs:188
at TouchDBBinding.CouchServer.get_ActiveTasks () <IL 0x0001b, 0x00073>
Is it possible that there is something in the inner workings of MonoTouch that can be a problem when an NSArray* with retain is bound to an NSDictionary[] and that this said property is null? Or is it possible that it is because it has null content?
Thanks, Paul
