Bug 43536 - [iOS] MTOUCH: error MT3001: Could not AOT the assembly
Summary: [iOS] MTOUCH: error MT3001: Could not AOT the assembly
Alias: None
Product: iOS
Classification: Xamarin
Component: Mono runtime / AOT compiler ()
Version: XI 9.8 (tvOS / C7)
Hardware: Macintosh Mac OS
: --- normal
Target Milestone: Untriaged
Assignee: Zoltan Varga
Depends on:
Reported: 2016-08-19 10:15 UTC by Al Clark [MSFT]
Modified: 2017-02-07 11:56 UTC (History)
9 users (show)

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

Sample and build output (155.25 KB, application/zip)
2016-08-19 10:15 UTC, Al Clark [MSFT]
Image of version and processes (390.30 KB, image/png)
2016-08-19 10:22 UTC, Al Clark [MSFT]

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Description Al Clark [MSFT] 2016-08-19 10:15:37 UTC
Created attachment 17119 [details]
Sample and build output

== Overview

Building project never completes.  llc process using 100% CPU indefinitely.  Build process completes (fails) after killing this process.

== Steps to reproduce

Load Xamarin Studio for Mac.
Load attached project.
Build project.

== Expected behaviour

Project to build and deploy to device / sim.

== Actual behaviour

Project build halts with process 'llc' using 100% CPU.  Process can be killed and build continues with error:

MTOUCH: error MT3001: Could not AOT the assembly '/Users/DPLabs/Documents/MachiningCloudGit/MachiningCloud/MachiningCloud.UI.Ios/obj/iPhone/Ad-Hoc/mtouch-cache/64/Build/MachiningCloudApp.exe'

*** Sample and Build Output attached ***

== Version information

=== Xamarin Studio Business ===

Version 6.1 (build 4963)
Installation UUID: 51f5ac26-e47e-45a4-8735-cbfa82ca4a6f
	Mono 4.4.0 (mono-4.4.0-branch/fcf7a6d) (64-bit)
	GTK+ 2.24.23 (Raleigh theme)

	Package version: 404000148

=== NuGet ===


=== Xamarin.Profiler ===

Not Installed

=== Xamarin.Android ===

Not Installed

=== Xamarin Android Player ===

Not Installed

=== Apple Developer Tools ===

Xcode 7.3.1 (10188.1)
Build 7D1014

=== Xamarin.iOS ===

Version: (Xamarin Business)
Hash: ef65ca5
Branch: master
Build date: 2016-06-07 21:27:36-0400

=== Xamarin.Mac ===

Not Installed

=== Build Information ===

Release ID: 601004963
Git revision: b37c52e0249c009e308eb144957ac97d1003ec0e
Build date: 2016-06-10 12:00:02-04
Xamarin addins: db4bae9b11a32d16ee009695cd1bfa36455187b0
Build lane: monodevelop-lion-cycle8-preview2

=== Operating System ===

Mac OS X 10.11.5
Darwin DPLabss-Mac-mini.local 15.5.0 Darwin Kernel Version 15.5.0
    Tue Apr 19 18:36:36 PDT 2016
    root:xnu-3248.50.21~8/RELEASE_X86_64 x86_64
Comment 1 Al Clark [MSFT] 2016-08-19 10:22:46 UTC
Created attachment 17120 [details]
Image of version and processes
Comment 6 Al Clark [MSFT] 2016-08-30 11:26:23 UTC
Disabling LLVM allows the project to be build (as expected).

Additional information from the customer:

When we were using Xamarin.IOS the llc process gives strange error message:
* Assertion: should not be reached at /Users/builder/data/lanes/1381/ef65ca51/source/xamarin-macios/external/mono/mono/mini/llvm-jit.cpp:753

And the build fails. This happened with our full solution, not the sample.

I have tried the sample on v., it hangs. And on the latest version ( the sample still hangs.