Re: [Devel] infinite loop/autohinter crash

[Werner LEMBERG]

> Is there a utility I can use to simply dump the contents of the ttf
> file in some readable format?

Yes, fonttools (from fonttools.sf.net).  It first indicates a corrupt
cmap table:


Dumping "flunk.ttf" to "flunk"...
Dumping 'OS/2' table...
Traceback (most recent call last):
  File "/usr/local/bin/ttDump", line 100, in ?
    splitTables=splitTables, disassembleInstructions=disassembleInstructions)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
210, in saveXML
    table = self[tag]
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
316, in __getitem__
    table.decompile(data, self)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/tables/_c_m_a_p.py",
 line 35, in decompile
    table.decompile(data[offset:offset+int(length)], ttFont)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/tables/_c_m_a_p.py",
 line 191, in decompile
    assert len(data) == length, "corrupt cmap table (%d, %d)" % (len(data), 
length)
AssertionError: corrupt cmap table (544, 556)


Using `-x cmap' to skip the cmap table, it then complains about an
incorrect glyph table:


Traceback (most recent call last):
  File "/usr/local/bin/ttDump", line 100, in ?
    splitTables=splitTables, disassembleInstructions=disassembleInstructions)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
210, in saveXML
    table = self[tag]
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
316, in __getitem__
    table.decompile(data, self)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/tables/_g_l_y_f.py",
 line 35, in decompile
    glyphName = glyphOrder[i]
IndexError: list index out of range


Repeating the game, you get an incorrect htmx table:


too much data for hmtx/vmtx table
Traceback (most recent call last):
  File "/usr/local/bin/ttDump", line 100, in ?
    splitTables=splitTables, disassembleInstructions=disassembleInstructions)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
210, in saveXML
    table = self[tag]
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
316, in __getitem__
    table.decompile(data, self)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/tables/_h_m_t_x.py",
 line 44, in decompile
    glyphName = ttFont.getGlyphName(i)
  File 
"/usr/lib/python2.1/site-packages/FontTools/fontTools/ttLib/__init__.py", line 
429, in getGlyphName
    return self.getGlyphOrder()[glyphID]
IndexError: list index out of range


The remaining tables are completely useless.  It seems that your
translation process is severely broken.

Just, any chance to make ttDump continue?  Since FreeType 1 can
display the font (albeit incompletely), the errors aren't apparently
too severe.


    Werner