I've searched through this group, StackOverflow, and the MT bugzilla list.
There are a lot of mentions about this, but I'm having a hard time finding
an authoritative answer. Assume the following code:
var list = new List<Foo>();
list.Add (new Foo { Id = 3, Name="def"});
list.Add (new Foo { Id = 2, Name="def"});
list.Add (new Foo { Id = 1, Name="ggg"});
var x = from l in list orderby l.Name, l.Id select l;
foreach (var item in x) { ... do something ... }
public class Foo {
public int Id { get; set; }
public string Name { get; set; }
}
When running on the device, I get the info pasted below.
Notes:
1. This only fails on the device
2. It doesn't fail if you just have one orderby item
I have a lot of LINQ in my POCO classes, and I wouldn't relish the idea of
unwinding it all.
What do I need to do to make this work?
Unhandled Exception: System.ExecutionEngineException: Attempting to JIT
compile method
'System.Linq.OrderedEnumerable`1<Foo>:CreateOrderedEnumerable<int>
(System.Func`2<Foo, int>,System.Collections.Generic.IComparer`1<int>,bool)'
while running with --aot-only.
at System.Linq.Enumerable.ThenBy[Foo,Int32] (IOrderedEnumerable`1 source,
System.Func`2 keySelector, IComparer`1 comparer) [0x00007] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2787
at System.Linq.Enumerable.ThenBy[Foo,Int32] (IOrderedEnumerable`1 source,
System.Func`2 keySelector) [0x00000] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2779
at TestLibrary.HelloContext.List () [0x00006] in
/Users/danmiser/code/MonoTouchRestDemo/TestLibrary/MyClass.cs:18
at MonoTouchRestDemo.MonoTouchRestDemoViewController.<ViewDidLoad>m__0
(System.Object sender, System.EventArgs e) [0x00006] in
/Users/danmiser/code/MonoTouchRestDemo/MonoTouchRestDemo/MonoTouchRestDemoViewController.cs:38
at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in
/Developer/MonoTouch/Source/monotouch/src/UIKit/UIControl.cs:30
at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String
principalClassName, System.String delegateClassName) [0x00042] in
/Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:29
at MonoTouchRestDemo.Application.Main (System.String[] args) [0x00000] in
/Users/danmiser/code/MonoTouchRestDemo/MonoTouchRestDemo/Main.cs:16
[ERROR] FATAL UNHANDLED EXCEPTION: System.ExecutionEngineException:
Attempting to JIT compile method
'System.Linq.OrderedEnumerable`1<TestLibrary.HelloClone>:CreateOrderedEnumerable<int>
(System.Func`2<TestLibrary.HelloClone,
int>,System.Collections.Generic.IComparer`1<int>,bool)' while running with
--aot-only.
at System.Linq.Enumerable.ThenBy[Foo,Int32] (IOrderedEnumerable`1 source,
System.Func`2 keySelector, IComparer`1 comparer) [0x00007] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2787
at System.Linq.Enumerable.ThenBy[Foo,Int32] (IOrderedEnumerable`1 source,
System.Func`2 keySelector) [0x00000] in
/Developer/MonoTouch/Source/mono/mcs/class/System.Core/System.Linq/Enumerable.cs:2779
at TestLibrary.HelloContext.List () [0x00006] in
/Users/danmiser/code/MonoTouchRestDemo/TestLibrary/MyClass.cs:18
at MonoTouchRestDemo.MonoTouchRestDemoViewController.<ViewDidLoad>m__0
(System.Object sender, System.EventArgs e) [0x00006] in
/Users/danmiser/code/MonoTouchRestDemo/MonoTouchRestDemo/MonoTouchRestDemoViewController.cs:38
at MonoTouch.UIKit.UIControlEventProxy.Activated () [0x00000] in
/Developer/MonoTouch/Source/monotouch/src/UIKit/UIControl.cs:30
at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String
principalClassName, System.String delegateClassName) [0x00042] in
/Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:29
at MonoTouchRestDemo.Application.Main (System.String[] args) [0x00000] in
/Users/danmiser/code/MonoTouchRestDemo/MonoTouchRestDemo/Main.cs:16
Terminating runtime due to unhandled exception
Stacktrace:
Native stacktrace:
0 MonoTouchRestDemo 0x01616970
mono_handle_native_sigsegv + 280
1 MonoTouchRestDemo 0x016396c4
sigabrt_signal_handler +
180
2 libsystem_c.dylib 0x331b6539 _sigtramp + 48
3 libsystem_c.dylib 0x331abf5b pthread_kill + 54
4 libsystem_c.dylib 0x331a4feb abort + 94
5 MonoTouchRestDemo 0x016f2774 monoeg_g_logv + 152
6 MonoTouchRestDemo 0x016f27c0
monoeg_assertion_message
+ 52
7 MonoTouchRestDemo 0x01600348 mono_thread_abort +
148
8 MonoTouchRestDemo 0x0161653c
mono_handle_exception_internal + 3188
9 MonoTouchRestDemo 0x01616740
mono_handle_exception +
24
10 MonoTouchRestDemo 0x016382d8
mono_arm_throw_exception
+ 172
11 MonoTouchRestDemo 0x005c361c throw_exception + 48
12 MonoTouchRestDemo 0x01602910
mono_jit_compile_method
+ 68
13 MonoTouchRestDemo 0x016a9ed8 mono_compile_method
+ 56
14 MonoTouchRestDemo 0x01619d10
common_call_trampoline +
1364
15 MonoTouchRestDemo 0x01617de4
mono_vcall_trampoline +
228
16 MonoTouchRestDemo 0x005c3528
generic_trampoline_vcall
+ 136
17 MonoTouchRestDemo 0x003b1c5c
System_Linq_Enumerable_ThenBy_TestLibrary_HelloClone_int_System_Linq_IOrderedEnumerable_1_TestLibrary_HelloClone_System_Func_2_TestLibrary_HelloClone_int
+ 144
18 MonoTouchRestDemo 0x003b0ca0
TestLibrary_HelloContext_List + 512
19 MonoTouchRestDemo 0x006a9d34
MonoTouchRestDemo_MonoTouchRestDemoViewController__ViewDidLoadm__0_object_System_EventArgs
+ 300
20 MonoTouchRestDemo 0x0000edcc
MonoTouch_UIKit_UIControlEventProxy_Activated + 68
21 MonoTouchRestDemo 0x0057c188
wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
+ 200
22 MonoTouchRestDemo 0x01602fbc
mono_jit_runtime_invoke
+ 1644
23 MonoTouchRestDemo 0x016ab43c mono_runtime_invoke +
128
24 MonoTouchRestDemo 0x01707b54 monotouch_trampoline
+
3228
25 CoreFoundation 0x34321435 -[NSObject
performSelector:withObject:withObject:] + 52
26 UIKit 0x3778b9eb -[UIApplication
sendAction:to:from:forEvent:] + 62
27 UIKit 0x3778b9a7 -[UIApplication
sendAction:toTarget:fromSender:forEvent:] + 30
28 UIKit 0x3778b985 -[UIControl
sendAction:to:forEvent:] + 44
29 UIKit 0x3778b6f5 -[UIControl(Internal)
_sendActionsForEvents:withEvent:] + 492
30 UIKit 0x3778c02d -[UIControl
touchesEnded:withEvent:] + 476
31 UIKit 0x3778a50f -[UIWindow
_sendTouchesForEvent:] + 318
32 UIKit 0x37789f01 -[UIWindow
sendEvent:] +
380
33 UIKit 0x377704ed -[UIApplication
sendEvent:] + 356
34 UIKit 0x3776fd2d
_UIApplicationHandleEvent + 5808
35 GraphicsServices 0x30ba2df3 PurpleEventCallback +
882
36 CoreFoundation 0x3439b553
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 38
37 CoreFoundation 0x3439b4f5 __CFRunLoopDoSource1
+
140
38 CoreFoundation 0x3439a343 __CFRunLoopRun + 1370
39 CoreFoundation 0x3431d4dd CFRunLoopRunSpecific
+
300
40 CoreFoundation 0x3431d3a5 CFRunLoopRunInMode +
104
41 GraphicsServices 0x30ba1fcd GSEventRunModal + 156
42 UIKit 0x3779e743 UIApplicationMain +
1090
43 MonoTouchRestDemo 0x00026cfc
wrapper_managed_to_native_MonoTouch_UIKit_UIApplication_UIApplicationMain_int_string___intptr_intptr
+ 240
44 MonoTouchRestDemo 0x006a8f20
MonoTouchRestDemo_Application_Main_string__ + 152
45 MonoTouchRestDemo 0x0057c188
wrapper_runtime_invoke_object_runtime_invoke_dynamic_intptr_intptr_intptr_intptr
+ 200
46 MonoTouchRestDemo 0x01602fbc
mono_jit_runtime_invoke
+ 1644
47 MonoTouchRestDemo 0x016ab43c mono_runtime_invoke +
128
48 MonoTouchRestDemo 0x016af6e8
mono_runtime_exec_main +
436
49 MonoTouchRestDemo 0x016b435c
mono_runtime_run_main +
756
50 MonoTouchRestDemo 0x01607344 mono_jit_exec + 140
51 MonoTouchRestDemo 0x015ff550 main + 2168
52 MonoTouchRestDemo 0x00002504 start + 52
--
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