[Webkit-unassigned] [Bug 176303] New: [GTK] UI process crash in webkit_web_view_restore_session_state

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=176303

            Bug ID: 176303
           Summary: [GTK] UI process crash in
                    webkit_web_view_restore_session_state
           Product: WebKit
           Version: Other
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit Gtk
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: mcatanzaro at igalia.com
                CC: bugs-noreply at webkitgtk.org

Created attachment 319775

  --> https://bugs.webkit.org/attachment.cgi?id=319775&action=review

Backtrace from Red Hat Bugzilla

I have 45 reports of this crash in Fedora, but only from 10 unique users. This crash is particularly nasty because once you get into this state, Epiphany will crash immediately on startup until you delete your session_state.xml:

Truncated backtrace:
Thread no. 1 (10 frames)
 #0 WTFCrash at /usr/src/debug/webkitgtk-2.16.3/Source/WTF/wtf/Assertions.cpp:323
 #1 WTF::CrashOnOverflow::crash at /usr/src/debug/webkitgtk-2.16.3/Source/WTF/wtf/CheckedArithmetic.h:85
 #2 WTF::CrashOnOverflow::overflowed at /usr/src/debug/webkitgtk-2.16.3/Source/WTF/wtf/CheckedArithmetic.h:78
 #3 WTF::Vector<WTF::RefPtr<WebKit::WebBackForwardListItem>, 0ul, WTF::CrashOnOverflow, 16ul>::at at /usr/src/debug/webkitgtk-2.16.3/Source/WTF/wtf/Vector.h:661
 #4 WTF::Vector<WTF::RefPtr<WebKit::WebBackForwardListItem>, 0ul, WTF::CrashOnOverflow, 16ul>::operator[] at /usr/src/debug/webkitgtk-2.16.3/Source/WTF/wtf/Vector.h:676
 #5 WebKit::WebBackForwardList::backItem at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/UIProcess/WebBackForwardList.cpp:222
 #6 WebKit::WebPageProxy::restoreFromSessionState at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/UIProcess/WebPageProxy.cpp:2442
 #7 webkit_web_view_restore_session_state at /usr/src/debug/webkitgtk-2.16.3/Source/WebKit2/UIProcess/API/gtk/WebKitWebView.cpp:3791
 #8 load_delayed_request_if_mapped at ephy-embed.c:650
 #9 g_timeout_dispatch

Two backtraces attached, from separate users.

I worked a bit with this with Kai from the GNOME bug report at GUADEC, saving the bad Ephy session state and messing with it to figure out what went wrong. See the downstream GNOME bug for more details. Here is the problematic embed state. The first version is good and the second version, which got saved into Kai's session state, is bad.
14c14
<                <embed url="https://dstip.zuv.tu-berlin.de/student/applications/3539?step=6" title="Probleme beim Laden der Seite" loading="true" history="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"/>
---
> 	 	 <embed url="https://dstip.zuv.tu-berlin.de/student/applications/3539?step=6" title="Probleme beim Laden der Seite" history="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"/>

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