FATAL:DCHECK failed on BreakingContext::rewindToMidWordBreak()

third_party/WebKit/Source/core/layout/line/BreakingContextInlineHeaders.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
@@ skipping 988 matching lines @@
             if (hyphenate(layoutText, style, font, *hyphenation, lastSpaceWordSpacing, wordMeasurement)) {
                 hyphenated = true;
                 m_atEnd = true;
             }
             m_width.addUncommittedWidth(wordMeasurement.width);
         }
         if (!hyphenated && isBreakAtSoftHyphen() && !disableSoftHyphen) {
             hyphenated = true;
             m_atEnd = true;
         }
+        if (!m_ignoringSpaces && canBreakMidWord)

[kojii, 2016/09/27 07:51:01]

Probably this can be "else if"?

+            m_atEnd = true;
     }
     return false;
 }
 
 inline void BreakingContext::prepareForNextCharacter(const LineLayoutText& layoutText, bool& prohibitBreakInside, bool previousCharacterIsSpace)
 {
     if (layoutText.isSVGInlineText() && m_current.offset()) {
         // Force creation of new InlineBoxes for each absolute positioned character (those that start new text chunks).
         if (LineLayoutSVGInlineText(layoutText).characterStartsNewTextChunk(m_current.offset()))
             m_lineMidpointState.ensureCharacterGetsLineBox(m_current);
@@ skipping 183 matching lines @@
 
     if (style.getTextIndentType() == TextIndentHanging)
         indentText = indentText == IndentText ? DoNotIndentText : IndentText;
 
     return indentText;
 }
 
 } // namespace blink
 
 #endif // BreakingContextInlineHeaders_h