1824666 - Crash in [@ mozilla::URLPreloader::ReadCache]

Status: RESOLVED DUPLICATE of bug 1724336

(Core :: XPConnect, defect)

Description

[Gabriele Svelto [:gsvelto] (PTO)]

Crash report: https://crash-stats.mozilla.org/report/index/f74ed3f2-0340-4bd1-b1eb-f41d90230324

MOZ_CRASH Reason: MOZ_DIAGNOSTIC_ASSERT(key.mPath.Length() > 0) (Path should be non-empty)

Top 10 frames of crashing thread:

0  xul.dll  mozilla::URLPreloader::ReadCache  js/xpconnect/loader/URLPreloader.cpp:318
1  xul.dll  mozilla::URLPreloader::BackgroundReadFiles  js/xpconnect/loader/URLPreloader.cpp:352
2  xul.dll  mozilla::detail::RunnableMethodArguments<>::applyImpl  xpcom/threads/nsThreadUtils.h:1163
2  xul.dll  mozilla::detail::RunnableMethodArguments<>::apply  xpcom/threads/nsThreadUtils.h:1169
2  xul.dll  mozilla::detail::RunnableMethodImpl<nsCOMPtr<nsIThreadPool>, nsresult   xpcom/threads/nsThreadUtils.h:1216
3  xul.dll  nsThread::ProcessNextEvent  xpcom/threads/nsThread.cpp:1233
4  xul.dll  NS_ProcessNextEvent  xpcom/threads/nsThreadUtils.cpp:477
4  xul.dll  mozilla::ipc::MessagePumpForNonMainThreads::Run  ipc/glue/MessagePump.cpp:300
5  xul.dll  MessageLoop::RunInternal  ipc/chromium/src/base/message_loop.cc:381
5  xul.dll  MessageLoop::RunHandler  ipc/chromium/src/base/message_loop.cc:374

We're triggering this assertion on nightly for a few users. There's one user who's been affected several times (and left a comment that he cannot start Firefox) and then there's several others who seem to have experienced only one or two crashes.