Crash due to the use of method swizzling

[nalexn]

Description

We've recently started getting random crashes with the following stack:

Crashed: com.apple.main-thread
0   libobjc.A.dylib                0x2224 cache_getImp + 132
1   libobjc.A.dylib                0x1057c cache_t::shouldFlush(objc_selector*, void (*)()) const + 64
2   libobjc.A.dylib                0xc668 invocation function for block in flushCaches(objc_class*, char const*, bool (objc_class*) block_pointer) + 32
3   libobjc.A.dylib                0xd534 flushCaches(objc_class*, char const*, bool (objc_class*) block_pointer) + 296
4   libobjc.A.dylib                0x1c6b8 _method_setImplementation(objc_class*, method_t*, void (*)()) + 224
5   libobjc.A.dylib                0x19da4 method_setImplementation + 96
6   myapp                          0x5b97ec one-time initialization function for dismissSwizzling + 647 (FloatingPanelController.swift:647)
7   libdispatch.dylib              0x64094 _dispatch_client_callout + 16
8   libdispatch.dylib              0x34bf8 _dispatch_once_callout + 28
9   myapp                          0x5b6c98 FloatingPanelController.setUp() + 641 (FloatingPanelController.swift:641)
10  myapp                          0x5b9fa0 specialized FloatingPanelController.init(delegate:) + 4317159328 (<compiler-generated>:4317159328)
11  myapp                          0x5b6a68 FloatingPanelController.init(delegate:) + 4317145704 (<compiler-generated>:4317145704)

Expected behavior

No crash

Actual behavior

A random crash

Steps to reproduce

I believe we've started seeing this crash after adding other libraries that also do swizzling. While this is understandable for SDKs like analytics to do the swizzling, I believe the libraries like this should refrain from using it. Please explore less hacky alternatives.

How do you display panel(s)?

• Add as child view controllers

How many panels do you displays?

• 1

Environment

Library version

1.7.6

Installation method

SPM

iOS version(s)

iOS 16.4

Xcode version

14.3

[scenee]

In v2.6.3, the swizzling implementation has been updated for cases where it is used with the analysis library. I would like you to try the version and please give me a feedback.

[nihedr9]

any update on this ?
still having the problem in v2.8.0

[scenee]

@nihedr9

Is it possible to let me know which libraries the above crashes occur when used with?

[nihedr9]

@scenee not using any special third party librairies with it

Do you want me to create a PR with your commit bea2980

[scenee]

I'm sorry for the late reply. I've added the commit into the master as 0e0f773. It would be helpful to know if this resolved the crash issue.

[scenee]

@nalexn, @nihedr9

I've released a possible fix at 0e0f773 in v2.8.2. If you still encounter this issue, I'm glad for you to report it in this issue. I would continue to investigate it.

[nihedr9]

hey @scenee
We don't have the crash anymore. Thank you for your assistance 👍