New onset Metal Validation failure

Question

Aviametrix OP

Created Apr ’23

Replies 3

Boosts 0

Views 1.8k

Participants 4

I have an older App using SpriteKit and have updated to Xcode 14.3. Compilation and linking is ok.

App never gets to my code but crashes in AppDelegate with:

Metal API Validation Enabled
-[MTLDebugDevice newLibraryWithURL:error:]:2250: failed assertion `url must not be nil.&#039;

I do not anywhere explicitly init() or call Metal. Using LLDB at the point of crash, I tried to peek into the App Bundle but

po Bundle.main.paths(forResourcesOfType: "URL", inDirectory: "nil")
0 elements

likewise:

po Bundle.main.paths(forResourcesOfType: "*", inDirectory: "nil")
0 elements

I suspect a build script or preformed bundle.main got screwed up, but I do not know how to investigate.

I should that this seems to be isolated to one MacBook Pro, compiles and runs fine on an iMac!

Any thoughts?

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Answer 1

Frameworks Engineer OP

Apple

May ’23

Hi Aviametrix

Are you using the final release version of Xcode 14.3 or one of the betas? This was a bug in the simulators that shipped with the early Xcode 14.3 betas but should be resolved in the release version.

0

Answer 2

blueskyAvametrics OP

May ’23

Further investigation revealed that this bug was only found in a single simulator (iPhone 14 Pro running 16.4) on a single laptop (MacBook Pro 16” 2021) running the release 13.4 Xcode.

Since this was a standard baseline Sim for this release of Xcode, I could not figure out how to delete and replace it. The path of least investment and resistance was simply to delete Xcode and reload.

my final assessment: a corrupted Sim module. Why it got corrupted is unknown.

2

Answer 3

RomanSundurov1 OP

May ’23

I also got the error -[MTLDebugDevice newLibraryWithURL:error:]:2250: failed assertion `url must not be nil.' My version of Xcode is 14.3, I used Simulator iOS 16.2. The error went away when I started using Simulator iOS 16.4.

1