Bug 299967 – REGRESSION(300594@main): [ macOS Debug ] TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap is a constant crash

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Dawn Morningstar]

TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap
Is a constantly crashing api-test after 300594@main https://commits.webkit.org/300594@main

This is reproducible with run-api-tests --root <Path to spade> TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap
I locally bisected this to 300594@main, it passes at 300593@main

HISTORY:
https://results.webkit.org/?suite=api-tests&test=TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap

TEST-RUN:
https://build.webkit.org/#/builders/1226/builds/2384

STDIO:
https://s3-us-west-2.amazonaws.com/archives.webkit.org/mac-sequoia-x86_64%20arm64-debug-run-api-tests/[e-mail]

CRASH:
TestWebKitAPI.ProcessSwap.MemoryPressureDuringProcessSwap
16:38:53.883 16386         2025-09-26 16:03:26.885 TestWebKitAPI[24742:4715767] NSEventConcurrentProcessingEnabled=NO
16:38:53.883 16386         ASSERTION FAILED: m_table
16:38:53.883 16386         /Volumes/Data/worker/Apple-Sequoia-Debug-Build/build/WebKitBuild/Debug/usr/local/include/wtf/HashTable.h(237) : void WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>::checkValidity(const const_iterator &) const [HashTable = WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::Ref<WTF::DefaultWeakPtrImpl>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>>, Key = WTF::Ref<WTF::DefaultWeakPtrImpl>, Value = WTF::Ref<WTF::DefaultWeakPtrImpl>, Extractor = WTF::IdentityExtractor, HashFunctions = WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl>>, Traits = WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>, KeyTraits = WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl>>]
16:38:53.883 16386         1   0x14b3e8b7c WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>>::checkValidity(WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>> const&) const
16:38:53.883 16386         2   0x14b3e8b00 WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>>::operator==(WTF::HashTableConstIterator<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>> const&) const
16:38:53.883 16386         3   0x14b3e7f2c bool WTF::operator==<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>(WTF::HashTableConstIteratorAdapter<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>> const&, WTF::HashTableConstIteratorAdapter<WTF::HashTable<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>, WTF::IdentityExtractor, WTF::DefaultHash<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::HashTraits<WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>>, WTF::FastMalloc>, WTF::Ref<WTF::DefaultWeakPtrImpl, WTF::RawPtrTraits<WTF::DefaultWeakPtrImpl>, WTF::DefaultRefDerefTraits<WTF::DefaultWeakPtrImpl>>> const&)
16:38:53.883 16386         4   0x14d483318 WTF::WeakHashSet<WebKit::WebProcessProxy, WTF::DefaultWeakPtrImpl, (WTF::EnableWeakPtrThreadingAssertions)1>::WeakHashSetConstIterator::operator++()
16:38:53.883 16386         5   0x14d71efe0 WebKit::WebProcessPool::handleMemoryPressureWarning(WTF::Critical)
16:38:53.883 16386         6   0x14d7ed42c WebKit::installMemoryPressureHandler()::$_0::operator()(WTF::Critical, WTF::Synchronous) const
16:38:53.883 16386         7   0x14d7ed368 WTF::Detail::CallableWrapper<WebKit::installMemoryPressureHandler()::$_0, void, WTF::Critical, WTF::Synchronous>::call(WTF::Critical, WTF::Synchronous)
16:38:53.883 16386         8   0x116452870 WTF::Function<void (WTF::Critical, WTF::Synchronous)>::operator()(WTF::Critical, WTF::Synchronous) const
16:38:53.883 16386         9   0x116451df0 WTF::MemoryPressureHandler::releaseMemory(WTF::Critical, WTF::Synchronous)
16:38:53.883 16386         10  0x116459600 WTF::MemoryPressureHandler::respondToMemoryPressure(WTF::Critical, WTF::Synchronous)
16:38:53.883 16386         11  0x116452704 WTF::MemoryPressureHandler::beginSimulatedMemoryPressure()
16:38:53.883 16386         12  0x116459878 invocation function for block in WTF::MemoryPressureHandler::install()
16:38:53.883 16386         13  0x1850d1b54 notify_monitor_file
16:38:53.883 16386         14  0x180fba338 _dispatch_block_async_invoke2
16:38:53.883 16386         15  0x180fc485c _dispatch_client_callout
16:38:53.883 16386         16  0x180fe1b58 _dispatch_main_queue_drain.cold.5
16:38:53.883 16386         17  0x180fb9db0 _dispatch_main_queue_drain
16:38:53.883 16386         18  0x180fb9cec _dispatch_main_queue_callback_4CF
16:38:53.883 16386         19  0x18128bda4 __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
16:38:53.883 16386         20  0x18124ca9c __CFRunLoopRun
16:38:53.883 16386         21  0x18124bc58 CFRunLoopRunSpecific
16:38:53.883 16386         22  0x18281ac78 -[NSRunLoop(NSRunLoop) runMode:beforeDate:]
16:38:53.883 16386         23  0x103710724 TestWebKitAPI::Util::spinRunLoop(unsigned long long)
16:38:53.883 16386         24  0x102e06810 ProcessSwap_MemoryPressureDuringProcessSwap_Test::TestBody()
16:38:53.883 16386         25  0x103807b74 void testing::internal::HandleSehExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
16:38:53.883 16386         26  0x1037c0924 void testing::internal::HandleExceptionsInMethodIfSupported<testing::Test, void>(testing::Test*, void (testing::Test::*)(), char const*)
16:38:53.883 16386         27  0x1037c0874 testing::Test::Run()
16:38:53.883 16386         28  0x1037c17a4 testing::TestInfo::Run()
16:38:53.883 16386         29  0x1037c2938 testing::TestSuite::Run()
16:38:53.883 16386         30  0x1037d0744 testing::internal::UnitTestImpl::RunAllTests()
16:38:53.884 16386         31  0x10380c8a8 bool testing::internal::HandleSehExceptionsInMethodIfSupported<testing::internal::UnitTestImpl, bool>(testing::internal::UnitTestImpl*, bool (testing::internal::UnitTestImpl::*)(), char const*)

[Radar WebKit Bug Importer]

<rdar://problem/161749579>

[Ben Nham]

Pull request: https://github.com/WebKit/WebKit/pull/51660

[EWS]

Committed 300884@main (3a5023d40097): <https://commits.webkit.org/300884@main>

Reviewed commits have been landed. Closing PR #51660 and removing active labels.