<html>
    <head>
      <base href="https://bugs.webkit.org/" />
    </head>
    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [FreeType] ASSERTION FAILED: xPos + prefixWidth &lt;= availableWidth in WebCore::tryHyphenating"
   href="https://bugs.webkit.org/show_bug.cgi?id=166841">166841</a>
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>[FreeType] ASSERTION FAILED: xPos + prefixWidth &lt;= availableWidth in WebCore::tryHyphenating
          </td>
        </tr>

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

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

        <tr>
          <th>Version</th>
          <td>WebKit Nightly 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>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>mcatanzaro&#64;igalia.com
          </td>
        </tr>

        <tr>
          <th>CC</th>
          <td>bugs-noreply&#64;webkitgtk.org
          </td>
        </tr></table>
      <p>
        <div>
        <pre>Splitting this out from <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - [GTK] WebKitWebProcess at 100% CPU loading hyphenation dictionaries"
   href="show_bug.cgi?id=165601">bug #165601</a>...

There is an assertion failure when loading <a href="https://www.python.org/dev/peps/pep-0484/">https://www.python.org/dev/peps/pep-0484/</a>:

ASSERTION FAILED: xPos + prefixWidth &lt;= availableWidth
../../Source/WebCore/rendering/line/BreakingContext.h(724) : void WebCore::tryHyphenating(WebCore::RenderText&amp;, const WebCore::FontCascade&amp;, const WTF::AtomicString&amp;, unsigned int, int, int, int, unsigned int, unsigned int, float, int, bool, bool, int, WebCore::InlineIterator&amp;, WTF::Optional&lt;unsigned int&gt;, bool&amp;)
1   0x7f4cbe3b4c28 /home/mcatanzaro/src/jhbuild/install/lib/libjavascriptcoregtk-4.0.so.18(WTFCrash+0x1e) [0x7f4cbe3b4c28]
2   0x7f4cc5fb9fc5 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore14tryHyphenatingERNS_10RenderTextERKNS_11FontCascadeERKN3WTF12AtomicStringEjiiijjfibbiRNS_14InlineIteratorENS5_8OptionalIjEERb+0x4a6) [0x7f4cc5fb9fc5]
3   0x7f4cc5fba5a3 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZZN7WebCore15BreakingContext10handleTextERN3WTF6VectorINS_15WordMeasurementELm64ENS1_15CrashOnOverflowELm16EEERbRjENKUlRNS_14InlineIteratorEE0_clESA_+0x191) [0x7f4cc5fba5a3]
4   0x7f4cc5fc0a5f /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZNSt17_Function_handlerIFvRN7WebCore14InlineIteratorEEZNS0_15BreakingContext10handleTextERN3WTF6VectorINS0_15WordMeasurementELm64ENS5_15CrashOnOverflowELm16EEERbRjEUlS2_E0_E9_M_invokeERKSt9_Any_dataS2_+0x37) [0x7f4cc5fc0a5f]
5   0x7f4cc5fbed05 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZNKSt8functionIFvRN7WebCore14InlineIteratorEEEclES2_+0x49) [0x7f4cc5fbed05]
6   0x7f4cc5fb7afc /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15BreakingContext21InlineIteratorHistory4pushESt8functionIFvRNS_14InlineIteratorEEE+0xba) [0x7f4cc5fb7afc]
7   0x7f4cc5fbc188 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15BreakingContext10handleTextERN3WTF6VectorINS_15WordMeasurementELm64ENS1_15CrashOnOverflowELm16EEERbRj+0x19de) [0x7f4cc5fbc188]
8   0x7f4cc5fb5ce7 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11LineBreaker13nextLineBreakERNS_23BidiResolverWithIsolateINS_14InlineIteratorENS_7BidiRunENS_15BidiIsolatedRunEEERNS_8LineInfoERNS_15LineLayoutStateERNS_14RenderTextInfoEPNS_14FloatingObjectEjRN3WTF6VectorINS_15WordMeasurementELm64ENSF_15CrashOnOverflowELm16EEE+0x35b) [0x7f4cc5fb5ce7]
9   0x7f4cc5da050a /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow26layoutRunsAndFloatsInRangeERNS_15LineLayoutStateERNS_23BidiResolverWithIsolateINS_14InlineIteratorENS_7BidiRunENS_15BidiIsolatedRunEEERKS4_RKNS_10BidiStatusEj+0x358) [0x7f4cc5da050a]
10  0x7f4cc5da0109 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow19layoutRunsAndFloatsERNS_15LineLayoutStateEb+0x44b) [0x7f4cc5da0109]
11  0x7f4cc5da2881 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow15layoutLineBoxesEbRNS_10LayoutUnitES2_+0x6b1) [0x7f4cc5da2881]
12  0x7f4cc5d802c1 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow20layoutInlineChildrenEbRNS_10LayoutUnitES2_+0xb7) [0x7f4cc5d802c1]
13  0x7f4cc5d7f648 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow11layoutBlockEbNS_10LayoutUnitE+0x3b6) [0x7f4cc5d7f648]
14  0x7f4cc5d4d032 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11RenderBlock6layoutEv+0x7c) [0x7f4cc5d4d032]
15  0x7f4cc5d80682 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow16layoutBlockChildERNS_9RenderBoxERNS0_10MarginInfoERNS_10LayoutUnitES6_+0x3be) [0x7f4cc5d80682]
16  0x7f4cc5d801db /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow19layoutBlockChildrenEbRNS_10LayoutUnitE+0x247) [0x7f4cc5d801db]
17  0x7f4cc5d7f66c /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow11layoutBlockEbNS_10LayoutUnitE+0x3da) [0x7f4cc5d7f66c]
18  0x7f4cc5d4d032 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11RenderBlock6layoutEv+0x7c) [0x7f4cc5d4d032]
19  0x7f4cc5d80682 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow16layoutBlockChildERNS_9RenderBoxERNS0_10MarginInfoERNS_10LayoutUnitES6_+0x3be) [0x7f4cc5d80682]
20  0x7f4cc5d801db /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow19layoutBlockChildrenEbRNS_10LayoutUnitE+0x247) [0x7f4cc5d801db]
21  0x7f4cc5d7f66c /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow11layoutBlockEbNS_10LayoutUnitE+0x3da) [0x7f4cc5d7f66c]
22  0x7f4cc5d4d032 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11RenderBlock6layoutEv+0x7c) [0x7f4cc5d4d032]
23  0x7f4cc5d80682 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow16layoutBlockChildERNS_9RenderBoxERNS0_10MarginInfoERNS_10LayoutUnitES6_+0x3be) [0x7f4cc5d80682]
24  0x7f4cc5d801db /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow19layoutBlockChildrenEbRNS_10LayoutUnitE+0x247) [0x7f4cc5d801db]
25  0x7f4cc5d7f66c /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow11layoutBlockEbNS_10LayoutUnitE+0x3da) [0x7f4cc5d7f66c]
26  0x7f4cc5d4d032 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11RenderBlock6layoutEv+0x7c) [0x7f4cc5d4d032]
27  0x7f4cc5d1a223 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore13RenderElement14layoutIfNeededEv+0x35) [0x7f4cc5d1a223]
28  0x7f4cc5d87e23 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow20insertFloatingObjectERNS_9RenderBoxE+0x219) [0x7f4cc5d87e23]
29  0x7f4cc5d8019e /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow19layoutBlockChildrenEbRNS_10LayoutUnitE+0x20a) [0x7f4cc5d8019e]
30  0x7f4cc5d7f66c /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore15RenderBlockFlow11layoutBlockEbNS_10LayoutUnitE+0x3da) [0x7f4cc5d7f66c]
31  0x7f4cc5d4d032 /home/mcatanzaro/src/jhbuild/install/lib/libwebkit2gtk-4.0.so.37(_ZN7WebCore11RenderBlock6layoutEv+0x7c) [0x7f4cc5d4d032]</pre>
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      </p>
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