error MT0099 : Internal error persists in Release build with latest Mono

[yevgeniy-seleznev]

There has been a linker issue persisting in the Release configuration of our Seeing AI build for some time -- the last version to work was mono 5.8.1. We have thus been locked to this mono version in our production VSTS builds. The original bug 4236 is now closed, reportedly fixed in xamarion.ios 12.0 but unfortunately we can still repro it and it seems to fail with the same MT0099 error. Creating a new bug per Rolf's request.

We are planning to drop a new version of Seeing AI to Apple soon and it would be great to be able to use the latest IDE bits.

Steps to Reproduce

1. Install XI 12.2.1.11 or later
2. Clone the SeeingAI app (internal)
3. Build it in Release config

Expected Behavior

Successful build

Actual Behavior

error MT0099 : Internal error : Not all assemblies for Xamarin.Sdk have link tasks. Please file a bug report with a test case (http://bugzilla.xamarin.com). [/Users/vsts/agent/2.144.0/work/1/s/iOS/App/SeeingAI.iOS.csproj

Environment

OS X 10.13.6
Mono 5.16.0
Visual Studio for Mac 7.7.1.15

(from VSTS hosted macOS image. https://github.com/Microsoft/azure-pipelines-image-generation/blob/master/images/macos/macos-Readme.md#xamarin)

Build Logs

BuildLog_LinkerError_Mono_5.16.txt

Example Project (If Possible)

Please contact Eugene, Harrison or Saqib from Seeing AI Team and we will get you access to the repo.

[spouliot]

@yevgeniy-seleznev Your issue is mostly likely related to Xamarin.iOS and not mono. The mono version is not automatically used with a specific version of Xamarin.iOS. IOW Mono 5.8 (or 5.16) could be used with different version of Xamarin.iOS.

Please follow the template's instructions to ensure we have all the required information to duplicate the issues, e.g.

Visual Studio: Help > About Microsoft Visual Studio > Copy Info [button]
Visual Studio for Mac: Visual Studio > About Visual Studio > Show Details > Copy Information [button]

Also your logs shows

/Library/Frameworks/Mono.framework/Versions/5.12.0/...

so it does not seems you're using Mono 5.16 either. The version of XI is unclear.

[spouliot]

@rolfbjarne did you had more details ? or access to the repo ?

[yevgeniy-seleznev]

That build log is from the hosted VSTS macOS image -- my understanding was that they are running XI 12.1...apologies if that's not the case. I am working on finding out the exact version of xamarin.ios which is being used there. If it's found that they aren't using 12.0, I'll close the bug.

[yevgeniy-seleznev]

Confirmed issue is fixed in xamarin.ios 12.1, closing