Bug 11452 - Arch check in anonymous method crashes the linker
Summary: Arch check in anonymous method crashes the linker
Alias: None
Product: iOS
Classification: Xamarin
Component: General ()
Version: 6.3.x
Hardware: PC Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Sebastien Pouliot
Depends on:
Reported: 2013-03-27 19:44 UTC by Rolf Bjarne Kvinge [MSFT]
Modified: 2013-03-28 11:37 UTC (History)
2 users (show)

Is this bug a regression?: ---
Last known good build:

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Description Rolf Bjarne Kvinge [MSFT] 2013-03-27 19:44:07 UTC
* Link all assemblies.
* Add this anywhere:

var button = new UIButton ();
button.TouchCancel += delegate 
	if (MonoTouch.ObjCRuntime.Runtime.Arch == Arch.SIMULATOR) {
		// kaboom

* Try to compile:

error MT2001: Could not link assemblies. Reason: Object reference not set to an instance of an object
--- inner exception
System.NullReferenceException: Object reference not set to an instance of an object
  at MonoTouch.Tuner.OptimizeGeneratedCodeSubStep.ProcessLoadStaticField (Mono.Cecil.MethodDefinition caller, Int32 i) [0x00000] in <filename unknown>:0 
  at MonoTouch.Tuner.OptimizeGeneratedCodeSubStep.ProcessMethod (Mono.Cecil.MethodDefinition m) [0x00000] in <filename unknown>:0 
  at MonoTouch.Tuner.OptimizeGeneratedCodeSubStep.ProcessMethods (ICollection c) [0x00000] in <filename unknown>:0 
  at MonoTouch.Tuner.OptimizeGeneratedCodeSubStep.ProcessType (Mono.Cecil.TypeDefinition type) [0x00000] in <filename unknown>:0 
  at Mono.Tuner.SubStepDispatcher.DispatchType (Mono.Cecil.TypeDefinition type) [0x00000] in <filename unknown>:0 
  at Mono.Tuner.SubStepDispatcher.BrowseTypes (ICollection types) [0x00000] in <filename unknown>:0 
  at Mono.Tuner.SubStepDispatcher.BrowseAssemblies (IEnumerable`1 assemblies) [0x00000] in <filename unknown>:0 
  at Mono.Tuner.SubStepDispatcher.Process (Mono.Linker.LinkContext context) [0x00000] in <filename unknown>:0 
  at Mono.Linker.Pipeline.Process (Mono.Linker.LinkContext context) [0x00000] in <filename unknown>:0 
  at MonoTouch.Tuner.Linker.Process (MonoTouch.Tuner.LinkerOptions options, Mono.Linker.LinkContext& context, System.Collections.Generic.List`1& assemblies) [0x00000] in <filename unknown>:0
Comment 2 Sebastien Pouliot 2013-03-28 08:00:15 UTC
The anonymous delegate must be marked with [CompilerGenerated] and satisfy the other chekcs (subclassing NSObject).
Comment 3 Sebastien Pouliot 2013-03-28 11:37:40 UTC
Fixed in 364462aab1b7a2327955c5d299c619c5d1a67cbb (master) w/unit tests