Bug 285929 – REGRESSION(iOS 18): TestWebKitAPI.ShareSheetTests.ShareImgElementWithBase64URL (api-test) is a flaky crash on iOS

• Status: NEW
• Component: Tools / Tests

[Dawn Morningstar]

TestWebKitAPI.ShareSheetTests.ShareImgElementWithBase64URL
Is a flaky crash on iOS, this started occurring when we moved from iOS17 to iOS18

HISTORY:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.ShareSheetTests.ShareImgElementWithBase64URL&recent=false

Test-run:
https://build.webkit.org/#/builders/1391/builds/218

STDIO:
https://build.webkit.org/#/builders/1391/builds/218/steps/18/logs/stdio

Crash:
Crashed
    TestWebKitAPI.ShareSheetTests.ShareImgElementWithBase64URL
        *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Can not set up _UISceneHostingView with a nil scene'
        *** First throw call stack:
        (
        	0   CoreFoundation                      0x00000001096b810c __exceptionPreprocess + 172
        	1   libobjc.A.dylib                     0x000000010731eda8 objc_exception_throw + 72
        	2   Foundation                          0x0000000113449c70 _userInfoForFileAndLine + 0
        	3   UIKitCore                           0x000000016e949b98 -[_UISceneHostingView setPresentedScene:] + 568
        	4   UIKitCore                           0x000000016e3c3664 -[_UISceneHostingController createSceneWithConfiguration:] + 188
        	5   UIKitCore                           0x000000016e3c34fc -[_UISceneHostingController initWithAdvancedConfiguration:] + 140
        	6   UIKitCore                           0x000000016e3c358c -[_UISceneHostingController initWithProcessIdentity:sceneSpecification:] + 100
        	7   ShareSheet                          0x000000013db052b0 -[SHSheetRemoteScene setupSceneHosting] + 220
        	8   ShareSheet                          0x000000013db04ff8 -[SHSheetRemoteScene activate] + 124
        	9   ShareSheet                          0x000000013db4994c -[SHSheetInteractor startSession] + 244
        	10  ShareSheet                          0x000000013db43010 -[SHSheetPresenter initWithRouter:interactor:] + 160
        	11  ShareSheet                          0x000000013db363d0 +[SHSheetFactory createMainPresenterWithContext:] + 228
        	12  ShareSheet                          0x000000013db2e320 -[UIActivityViewController _createMainPresenterIfNeeded] + 80
        	13  libdispatch.dylib                   0x000000010d2fa314 _dispatch_call_block_and_release + 24
        	14  libdispatch.dylib                   0x000000010d2fbc08 _dispatch_client_callout + 16
        	15  libdispatch.dylib                   0x000000010d30ac2c _dispatch_main_queue_drain + 1276
        	16  libdispatch.dylib                   0x000000010d30a720 _dispatch_main_queue_callback_4CF + 40
        	17  CoreFoundation                      0x000000010961bdac __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ + 12
        	18  CoreFoundation                      0x0000000109616308 __CFRunLoopRun + 1944
        	19  CoreFoundation                      0x00000001096156f4 CFRunLoopRunSpecific + 552
        	20  Foundation                          0x0000000113501438 -[NSRunLoop(NSRunLoop) runMode:beforeDate:] + 208
        	21  TestWebKitAPI                       0x00000001038c9eb0 _ZN13TestWebKitAPI4Util3runEPb + 108
        	22  TestWebKitAPI                       0x0000000102c738e0 _ZN13TestWebKitAPI49ShareSheetTests_ShareImgElementWithBase64URL_Test8TestBodyEv + 504
        	23  TestWebKitAPI                       0x0000000103983be4 _ZN7testing8internal38HandleSehExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc + 148
        	24  TestWebKitAPI                       0x0000000103944310 _ZN7testing8internal35HandleExceptionsInMethodIfSupportedINS_4TestEvEET0_PT_MS4_FS3_vEPKc + 96
        	25  TestWebKitAPI                       0x0000000103944260 _ZN7testing4Test3RunEv + 192
        	26  TestWebKitAPI                       0x00000001039451ac _ZN7testing8TestInfo3RunEv + 304
        	27  TestWebKitAPI                       0x000000010394638c _ZN7testing9TestSuite3RunEv + 412
        	28  TestWebKitAPI                       0x0000000103954038 _ZN7testing8internal12UnitTestImpl11RunAllTestsEv + 1032
        	29  TestWebKitAPI                       0x0000000103988a78 _ZN7testing8internal38HandleSehExceptionsInMethodIfSupportedINS0_12UnitTestImplEbEET0_PT_MS4_FS3_vEPKc + 148
        	30  TestWebKitAPI                       0x00000001039539f4 _ZN7testing8internal35HandleExceptionsInMethodIfSupportedINS0_12UnitTestImplEbEET0_PT_MS4_FS3_vEPKc + 96
        	31  TestWebKitAPI                       0x0000000103953950 _ZN7testing8UnitTest3RunEv + 100
        	32  TestWebKitAPI                       0x0000000102d16930 _Z13RUN_ALL_TESTSv + 16
        	33  TestWebKitAPI                       0x0000000102d168c4 _ZN13TestWebKitAPI15TestsController3runEiPPc + 156
        	34  TestWebKitAPI                       0x0000000103937e40 main + 380
        	35  dyld                                0x00000001060ad410 start_sim + 20
        	36  ???                                 0x000000010618e274 0x0 + 4397261428
        )
        libc++abi: terminating due to uncaught exception of type NSException
        Child process terminated with signal 6: Abort trap

[Radar WebKit Bug Importer]

<rdar://problem/142903525>

[EWS]

Test gardening commit 288883@main (09cc81641e27): <https://commits.webkit.org/288883@main>

Reviewed commits have been landed. Closing PR #39011 and removing active labels.

[Alexey Proskuryakov]

Guessing (form just glancing at the stack trace) that as far as we are concerned this is mostly about this test winding down before SHSheet has a chance before doing its asynchronous work. Although that code could be more resilient, too.

[Alexey Proskuryakov]

*** Bug 285928 has been marked as a duplicate of this bug. ***