I has a crash in WebKit unfrtunately I didn't remember how/where it crashed.
Created attachment 13142 [details] StackTrace
Copying part of the backtrace to make it searchable: 0 com.apple.JavaScriptCore 0x00177e4b KJS::Context::mark() + 35 1 com.apple.JavaScriptCore 0x00124af3 KJS::Interpreter::mark(bool) + 25 2 com.apple.JavaScriptCore 0x0011a457 KJS::Collector::collect() + 67 3 com.apple.JavaScriptCore 0x00125a49 KJS::Interpreter::~Interpreter [not-in-charge]() + 193 4 com.apple.WebCore 0x014b0b38 KJS::ScriptInterpreter::~ScriptInterpreter [in-charge deleting]() + 32 5 com.apple.WebCore 0x010c896c WebCore::FramePrivate::~FramePrivate [in-charge]() + 920 6 com.apple.WebCore 0x010c8c21 WebCore::Frame::~Frame [not-in-charge]() + 199 7 com.apple.WebCore 0x010cc1c6 WebCore::FrameMac::~FrameMac [in-charge deleting]() + 202 8 com.apple.WebCore 0x013b3ff5 WebCore::PageState::clear() + 435 9 com.apple.WebCore 0x013c8593 WebCore::PageCache::close() + 63 10 com.apple.WebCore 0x013c7016 WebCore::HistoryItem::releasePageCache() + 22 11 com.apple.WebCore 0x013c7c69 WebCore::HistoryItem::releaseAllPendingPageCaches() + 113 12 com.apple.WebCore 0x014e8304 WebCore::Timer<WebCore::HistoryItemTimer>::fired() + 72
Back/Forward Cache teardown... Peter, what version of WebKit were you using?
The problem still occurs in WebKit build 20259 Looks like duplicate of #12672 *** This bug has been marked as a duplicate of 12672 ***