MatchedGeometryEffect crashes with the Compute AttributeGraph backend

[Kyle-Ye]

Description

Rendering a view that uses matchedGeometryEffect crashes when OpenSwiftUI uses the Compute/IAG AttributeGraph backend.

The same examples run without this crash when using OpenSwiftUI with Apple's AttributeGraph backend.

Reproduction

Change ContentView.swift's body to use MatchedGeometryEffectExample()

Env

iOS 18.5 Simulator

Expected behavior

The animation runs without crashing

Actual behavior

IAG crash

[jcmosc]

@Kyle-Ye I'm not able to reproduce this on my end.

Was the crash occurring in LayoutDescriptor comparison by any chance? There is an upcoming fix for certain layout strings being mis-encoded:
fe33e52

Otherwise the next release of Compute will have tracing parity with AttributeGraph. So we can do Graph.startTracing() and compare the graph-XXXX.ag-trace file with the graph-XXXX.iag-trace file to find out exactly where the behaviour diverges.

[jcmosc]

I was able to reproduce a crash when running on iOS simulator as opposed to macOS. It seems to tigger a different code path through the main thread handler.

[Kyle-Ye]

Yeah. My repro env is on iOS simulator. Updated.

[jcmosc]

@Kyle-Ye This should by fixed by 0.5.0 now!