Failed to AOT compile Microsoft.Graph.dll, Regression

[jbe2277]

Steps to Reproduce

1. Clone https://github.com/jbe2277/waf
2. Open NewsReader.sln
3. Build iOS version in Release Mode

Expected Behavior

Build should succeed. The GitHub project has an action that builds the iOS version. This takes about 3 minutes.

Successful build:

• https://github.com/jbe2277/waf/actions/runs/9921990632/job/27410570737
• MAUI workload: 8.0.61

Actual Behavior

GitHub runner goes for about 3 hours to build the iOS version. Result:

• https://github.com/jbe2277/waf/actions/runs/10333051344/job/28604991509
• MAUI workload: 8.0.71

/Users/runner/.dotnet/packs/Microsoft.iOS.Sdk.net8.0_17.5/17.5.8018/targets/Xamarin.Shared.Sdk.targets(1270,3): 
error : Failed to AOT compile Microsoft.Graph.dll, the AOT compiler exited with code 1. 
[/Users/runner/work/waf/waf/src/NewsReader/NewsReader.MauiSystem/NewsReader.MauiSystem.csproj::TargetFramework=net8.0-ios]

Changes from the successful build to the actual one

• Update MAUI workload with latest version (the build always gets the latest one)
• Requires to update Xcode from 15.2 to 15.4
• For that I had to switch the GitHub runner from macos-13 to macos-14

Related issues

• https://github.com/xamarin/xamarin-macios/issues/18388
• https://github.com/dotnet/runtime/issues/87061

[rolfbjarne]

I can reproduce the slowness, but not the crash. The crash might be due to excessive memory consumption though, in which case that might not happen on my machine.

However, there's a major difference between the two builds: the working build builds using the RuntimeIdentifier iossimulator-x64, while the failing one builds using the RuntimeIdentifier iossimulator-arm64. This is probably due to changing the GitHub runner (the default RuntimeIdentifier depends on the architecture of the Mac: on arm64 macs we build for iossimulator-arm64 by default, otherwise iossimulator-x64).

There are a couple of things coming together here:

• When building for arm64, we need to AOT assemblies (we can't JIT due to hardware constraints).
• Microsoft.Graph.dll is a rather big assembly, so the AOT compiler has to do a lot of work. This is why the build takes so long.

There are a couple of potential fixes:

• Enable the interpreter (MAUI only enables it by default for Debug builds), by adding this to your csproj:

<PropertyGroup>
    <UseInterpreter>true</UseInterpreter>
</PropertyGroup>

• Enable the trimmer (it's disabled by default for simulator builds), by adding this to your csproj:

<PropertyGroup>
    <MtouchLink>SdkOnly</MtouchLink>
</PropertyGroup>

Can you try either of these and see if it works?

[jbe2277]

I have enabled the trimmer - this solved the issue.

• https://github.com/jbe2277/waf/commit/d8295fb855c24af0b94561b5f33fabb587b931e5

[rolfbjarne]

I have enabled the trimmer - this solved the issue.

• jbe2277/waf@d8295fb

Great, I'll close this then. Thanks for confirming!