Hello, my multi-platform app crashes on startup fo...

# compose-ios

[Sagar Khurana]

Hello, my multi-platform app crashes on startup for iOS 15. x but runs fine on iOS 16, 17, and 18. How can I understand the Xcode crash logs? They're quite vague

Using :
compose-plugin -> 1.7.3
kotlin -> 2.1.0

0x104fa1ec8 <+1824>: mov    x1, #0x0                  ; =0 
    0x104fa1ecc <+1828>: bl     0x104fede5c               ; dyld3::MachOFile::isSimulatorPlatform(dyld3::Platform, dyld3::Platform*)
    0x104fa1ed0 <+1832>: tbnz   w0, #0x0, 0x104fa1ee4     ; <+1852>
    0x104fa1ed4 <+1836>: ldr    x1, [x19, #0x10]
    0x104fa1ed8 <+1840>: add    x2, sp, #0xd0
    0x104fa1edc <+1844>: mov    x0, x21
    0x104fa1ee0 <+1848>: bl     0x104fe0ad8               ; dyld4::ExternallyViewableState::commit(lsl::Allocator&, lsl::Allocator&)
    0x104fa1ee4 <+1852>: adrp   x1, -5
    0x104fa1ee8 <+1856>: add    x1, x1, #0x0
    0x104fa1eec <+1860>: mov    x0, x19
    0x104fa1ef0 <+1864>: bl     0x104fa23bc               ; dyld4::prepare(dyld4::APIs&, dyld3::MachOAnalyzer const*)
->  0x104fa1ef4 <+1868>: mov    x20, x0
    0x104fa1ef8 <+1872>: add    x0, sp, #0xd0
    0x104fa1efc <+1876>: bl     0x104fc9030               ; lsl::EphemeralAllocator::~EphemeralAllocator()
    0x104fa1f00 <+1880>: ldr    x16, [sp, #0x48]
    0x104fa1f04 <+1884>: cbnz   x16, 0x104fa1fd0          ; <+2088>
    0x104fa1f08 <+1888>: mov    x21, #0x0                 ; =0 
    0x104fa1f0c <+1892>: b      0x104fa1ff8               ; <+2128>
    0x104fa1f10 <+1896>: mov    x9, #0xfffff0000          ; =68719411200 
    0x104fa1f14 <+1900>: movk   x9, #0xc10c
    0x104fa1f18 <+1904>: ldrb   w8, [x9]

Would appreciate the help 🙏

[Sagar Khurana]

On looking closely its failing with this error

dyld[50638]: Symbol not found: _OBJC_CLASS_$_UIWindowSceneGeometryPreferencesIOS
 Referenced from:

[Sagar Khurana]

But not sure still how to fix it

[Andrei Salavei]

Hi, it looks like you have the UIWindowSceneGeometryPreferencesIOS class that is not exist in the older SDKs. Unfortunately, iOS version check won't help in this case. Could you please show the code that uses the UIWindowSceneGeometryPreferencesIOS to let me find possible solutions.

[François]

Yes, this API as been introduced on iOS 16.
https://developer.apple.com/documentation/uikit/uiwindowscene/geometrypreferences/ios?language=objc

[Sagar Khurana]

Hi, thanks for the response. Yes, that's right; UIWindowSceneGeometryPreferencesIOS
is not a part of iOS 15, hence the " symbol not found " issue

I was using this library, which was causing this crash. Now, I'm fixing it

Library - https://github.com/Chaintech-Network/ComposeMultiplatformMediaPlayer


Thanks for the insights!

[Jimmy Nelle]

Wouldn't recommend this library

[Sagar Khurana]

Wouldn't recommend this library

@Jimmy Nelle why 👀