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      <base href="https://bugs.webkit.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - REGRESSION(r202855): [GTK] ASSERTION FAILED: m_webPage.bounds().contains(bounds)"
   href="https://bugs.webkit.org/show_bug.cgi?id=159806">159806</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>REGRESSION(r202855): [GTK] ASSERTION FAILED: m_webPage.bounds().contains(bounds)
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>WebKit
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>WebKit Local Build
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Unspecified
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Keywords</th>
          <td>Gtk, Regression
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>Normal
          </td>
        </tr>

        <tr>
          <th>Priority</th>
          <td>P2
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>WebKit Gtk
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>webkit-unassigned&#64;lists.webkit.org
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>cgarcia&#64;igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bugs-noreply&#64;webkitgtk.org, zan&#64;falconsigh.net
          </td>
        </tr></table>
      <p>
        <div>
        <pre>This is happening in GTK+ debug bot after r202855. The problem is that since r202855, in case of non accelerated mode, the dirty region is updated too late when updating backing store state.

STDERR: ASSERTION FAILED: m_webPage.bounds().contains(bounds)
STDERR: ../../Source/WebKit2/WebProcess/WebPage/DrawingAreaImpl.cpp(422) : void WebKit::DrawingAreaImpl::display(WebKit::UpdateInfo&amp;)
STDERR: 1   0x7f5ab989bacf /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(WTFCrash+0x1e) [0x7f5ab989bacf]
STDERR: 2   0x7f5ac02395b2 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::DrawingAreaImpl::display(WebKit::UpdateInfo&amp;)+0x210) [0x7f5ac02395b2]
STDERR: 3   0x7f5ac0238a2c /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::DrawingAreaImpl::sendDidUpdateBackingStoreState()+0xe4) [0x7f5ac0238a2c]
STDERR: 4   0x7f5ac023620b /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::AcceleratedDrawingArea::updateBackingStoreState(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;)+0x22f) [0x7f5ac023620b]
STDERR: 5   0x7f5ac0238885 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::DrawingAreaImpl::updateBackingStoreState(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;)+0xb1) [0x7f5ac0238885]
STDERR: 6   0x7f5ac02e5800 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(void IPC::callMemberFunctionImpl&lt;WebKit::DrawingArea, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;), std::tuple&lt;unsigned long, bool, float, WebCore::IntSize, WebCore::IntSize&gt;, 0ul, 1ul, 2ul, 3ul, 4ul&gt;(WebKit::DrawingArea*, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;), std::tuple&lt;unsigned long, bool, float, WebCore::IntSize, WebCore::IntSize&gt;&amp;&amp;, std::integer_sequence&lt;unsigned long, 0ul, 1ul, 2ul, 3ul, 4ul&gt;)+0xf8) [0x7f5ac02e5800]
STDERR: 7   0x7f5ac02e5374 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(void IPC::callMemberFunction&lt;WebKit::DrawingArea, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;), std::tuple&lt;unsigned long, bool, float, WebCore::IntSize, WebCore::IntSize&gt;, std::integer_sequence&lt;unsigned long, 0ul, 1ul, 2ul, 3ul, 4ul&gt; &gt;(std::tuple&lt;unsigned long, bool, float, WebCore::IntSize, WebCore::IntSize&gt;&amp;&amp;, WebKit::DrawingArea*, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;))+0x41) [0x7f5ac02e5374]
STDERR: 8   0x7f5ac02e511b /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(void IPC::handleMessage&lt;Messages::DrawingArea::UpdateBackingStoreState, WebKit::DrawingArea, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;)&gt;(IPC::MessageDecoder&amp;, WebKit::DrawingArea*, void (WebKit::DrawingArea::*)(unsigned long, bool, float, WebCore::IntSize const&amp;, WebCore::IntSize const&amp;))+0x9b) [0x7f5ac02e511b]
STDERR: 9   0x7f5ac02e4d49 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::DrawingArea::didReceiveMessage(IPC::Connection&amp;, IPC::MessageDecoder&amp;)+0x9d) [0x7f5ac02e4d49]
STDERR: 10  0x7f5abfca7419 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(IPC::MessageReceiverMap::dispatchMessage(IPC::Connection&amp;, IPC::MessageDecoder&amp;)+0x125) [0x7f5abfca7419]
STDERR: 11  0x7f5abff1b922 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebKit::WebProcess::didReceiveMessage(IPC::Connection&amp;, IPC::MessageDecoder&amp;)+0x4c) [0x7f5abff1b922]
STDERR: 12  0x7f5abfc91760 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(IPC::Connection::dispatchMessage(IPC::MessageDecoder&amp;)+0x3a) [0x7f5abfc91760]
STDERR: 13  0x7f5abfc918c3 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(IPC::Connection::dispatchMessage(std::unique_ptr&lt;IPC::MessageDecoder, std::default_delete&lt;IPC::MessageDecoder&gt; &gt;)+0x161) [0x7f5abfc918c3]
STDERR: 14  0x7f5abfc91aaa /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(IPC::Connection::dispatchOneMessage()+0xc8) [0x7f5abfc91aaa]
STDERR: 15  0x7f5abfc91604 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0x5162604) [0x7f5abfc91604]
STDERR: 16  0x7f5abfc9669e /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(+0x516769e) [0x7f5abfc9669e]
STDERR: 17  0x7f5abfc6119d /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WTF::Function&lt;void ()&gt;::operator()() const+0x37) [0x7f5abfc6119d]
STDERR: 18  0x7f5ab98b6df2 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(WTF::RunLoop::performWork()+0xce) [0x7f5ab98b6df2]
STDERR: 19  0x7f5ab98f9c18 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(+0x2245c18) [0x7f5ab98f9c18]
STDERR: 20  0x7f5ab98f9c3d /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(+0x2245c3d) [0x7f5ab98f9c3d]
STDERR: 21  0x7f5ab98f9bb8 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(+0x2245bb8) [0x7f5ab98f9bb8]
STDERR: 22  0x7f5ab98f9be7 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(+0x2245be7) [0x7f5ab98f9be7]
STDERR: 23  0x7f5ab5399a26 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/DependenciesGTK/Root/lib/libglib-2.0.so.0(+0x53a26) [0x7f5ab5399a26]
STDERR: 24  0x7f5ab539a854 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/DependenciesGTK/Root/lib/libglib-2.0.so.0(g_main_context_dispatch+0x33) [0x7f5ab539a854]
STDERR: 25  0x7f5ab539aa39 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/DependenciesGTK/Root/lib/libglib-2.0.so.0(+0x54a39) [0x7f5ab539aa39]
STDERR: 26  0x7f5ab539ae60 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/DependenciesGTK/Root/lib/libglib-2.0.so.0(g_main_loop_run+0x1d7) [0x7f5ab539ae60]
STDERR: 27  0x7f5ab98fa1b8 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libjavascriptcoregtk-4.0.so.18(WTF::RunLoop::run()+0xac) [0x7f5ab98fa1b8]
STDERR: 28  0x7f5ac024375c /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(int WebKit::ChildProcessMain&lt;WebKit::WebProcess, WebKit::WebProcessMain&gt;(int, char**)+0x82) [0x7f5ac024375c]
STDERR: 29  0x7f5ac02435c8 /home/slave/webkitgtk/gtk-linux-64-debug/build/WebKitBuild/Debug/lib/libwebkit2gtk-4.0.so.37(WebProcessMainUnix+0x20) [0x7f5ac02435c8]
STDERR: 30  0x400cfa /home/slave/webkitgtk/gtk-linux-64-debug-tests/build/WebKitBuild/Debug/bin/WebKitWebProcess(main+0x34) [0x400cfa]
STDERR: 31  0x7f5ab2200b45 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf5) [0x7f5ab2200b45]
STDERR: LEAK: 1 WebProcessPool
STDERR: LEAK: 1 WebPageProxy</pre>
        </div>
      </p>
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