iOS app has a runtime crash when upgrading from Bazel 6.4 to Bazel 7.1.2

[tinder-kaijing]

Description of the bug:

After upgrading Bazel from 6.4 to 7.1.2, iOS app has a runtime crash. Here are more details:

• It crashed on one commercial xxxSDK. It is a commercial SDK, so we did not have their source code. we only have their SDK library. we did not build it from the source code, just use rules_apple's apple_dynamic_framework_import to import it

• I dump the action graph of xxxSDK of Bazel 6.4 vs Bazel 7.1.2, no much different. Bazel 6.4 only have one more extra ExecutionInfo: {requires-darwin: '', supports-xcode-requirements-set: ''} ,

• No rules_apple change, no build from source code. so something is wrong with linking

• However, in our Bazel 7.1.2 PR, there is no linking flag change. Is it possible something has changed in Bazel 7.1.2 itself?

• Other company had the similar crash issue during linking, but on a different scenario

• to use Emerge tool, to see about 200K size reduction when comparing Bazel 6.4 by Bazel 7.1.2 build.

• Went through the changelog of Bazel 7.0, Does see some changes of ObjC, and xxxSDK is ObjC library. but not sure which could have caused the crash.

Which category does this issue belong to?

Objective-C Rules

What's the simplest, easiest way to reproduce this bug? Please provide a minimal example if possible.

Since this is a commercial SDK library, and only happened on one functionality in our app, not sure how to provide an example to reproduce it.

Which operating system are you running Bazel on?

macOS 14.5

What is the output of bazel info release?

release 7.1.2

If bazel info release returns development version or (@non-git), tell us how you built Bazel.

No response

What's the output of git remote get-url origin; git rev-parse HEAD ?

return our internal git repo, and commit sha.

If this is a regression, please try to identify the Bazel commit where the bug was introduced with bazelisk --bisect.

No response

Have you found anything relevant by searching the web?

we have some discussion about this issue on two slack channel:

https://ios-dev-at-scale.slack.com/archives/CBVEC7KRQ/p1724283963037899

and

https://bazelbuild.slack.com/archives/CD3QY5C2X/p1724284117717189

Any other information, logs, or outputs that you want to share?

No response

[keith]

I think unfortunately this probably isn't enough to go on. If you diff the exec log or aquery output from before and after you can probably see what changed more specifically. Very likely it's related to linking and either there's a bug in rules_apple or a bug in the one you include that library