In here?
Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0 com.apple.CoreFoundation 0x00007fff89c0ea3a CFRelease + 1434
1 com.apple.mail 0x000000010cbfcc69 0x10c9a7000 + 2448489
2 com.apple.mail 0x000000010cbfc1d1 0x10c9a7000 + 2445777
3 com.apple.mail 0x000000010cbfbd6c 0x10c9a7000 + 2444652
4 com.apple.mail 0x000000010cb4ee5e 0x10c9a7000 + 1736286
5 com.apple.mail 0x000000010cab6c96 0x10c9a7000 + 1113238
6 com.apple.mail 0x000000010ca086e0 0x10c9a7000 + 399072
7 com.apple.MailUI 0x00007fff881f9c9e __55-[MUIWKViewController generateStyleInlinedWebDocument:]_block_invoke + 583
8 com.apple.MailUI 0x00007fff881eefa0 -[MUIWKAsynchronousRequest executeResponseWithMessage:object:] + 364
9 com.apple.MailUI 0x00007fff881f6ad7 -[MUIWKViewController _evaluateResponseBlockForUUID:responseBody:responseObject:] + 476
10 com.apple.MailUI 0x00007fff881f7362 -[MUIWKViewController receiveMessageFromWebProcessController:messageBody:wkObject:uniqueID:] + 1186
11 com.apple.MailUI 0x00007fff881ec0cc -[MUIWebDocumentViewGroup connection:didReceiveMessageWithName:body:] + 457
12 com.apple.WebKit 0x00007fff8a4b86f6 didReceiveMessage(OpaqueWKConnection const*, OpaqueWKString const*, void const*, void const*) + 144
13 com.apple.WebKit 0x00007fff8a612846 WebKit::WebConnectionClient::didReceiveMessage(WebKit::WebConnection*, ***::String const&, API::Object*) + 162
14 com.apple.WebKit 0x00007fff8a61263e WebKit::WebConnection::handleMessage(***::String const&, WebKit::UserData const&) + 54
15 com.apple.WebKit 0x00007fff8a61291a void IPC::handleMessage<Messages::WebConnection::HandleMessage, WebKit::WebConnection, void (WebKit::WebConnection::*)(***::String const&, WebKit::UserData const&)>(IPC::MessageDecoder&, WebKit::WebConnection*, void (WebKit::WebConnection::*)(***::String const&, WebKit::UserData const&)) + 96
16 com.apple.WebKit 0x00007fff8a546b61 IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&, IPC::MessageDecoder&) + 113
17 com.apple.WebKit 0x00007fff8a6c8016 WebKit::WebProcessProxy::didReceiveMessage(IPC::Connection&, IPC::MessageDecoder&) + 24
18 com.apple.WebKit 0x00007fff8a50e602 IPC::Connection::dispatchMessage(std::__1::unique_ptr<IPC::MessageDecoder, std::__1::default_delete<IPC::MessageDecoder> >) + 102
19 com.apple.WebKit 0x00007fff8a510b2e IPC::Connection::dispatchOneMessage() + 114
20 com.apple.JavaScriptCore 0x00007fff84fd5d85 ***::RunLoop::performWork() + 437
21 com.apple.JavaScriptCore 0x00007fff84fd6462 ***::RunLoop::performWork(void*) + 34
22 com.apple.CoreFoundation 0x00007fff89caa8b1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
23 com.apple.CoreFoundation 0x00007fff89c8a0ac __CFRunLoopDoSources0 + 556
24 com.apple.CoreFoundation 0x00007fff89c895cf __CFRunLoopRun + 927
25 com.apple.CoreFoundation 0x00007fff89c88fc8 CFRunLoopRunSpecific + 296
26 com.apple.HIToolbox 0x00007fff95bbdd55 RunCurrentEventLoopInMode + 235
27 com.apple.HIToolbox 0x00007fff95bbda97 ReceiveNextEventCommon + 184
28 com.apple.HIToolbox 0x00007fff95bbd9cf _BlockUntilNextEventMatchingListInModeWithFilter + 71
29 com.apple.AppKit 0x00007fff94ac4d96 _DPSNextEvent + 1067
30 com.apple.AppKit 0x00007fff94ac41c5 -[NSApplication _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 454
31 com.apple.AppKit 0x00007fff94ab8d28 -[NSApplication run] + 682
32 com.apple.AppKit 0x00007fff94a81fbe NSApplicationMain + 1176
33 libdyld.dylib 0x00007fff8bc025ad start + 1