[python3 pngmath throws struct.error

Marcin Wojdyr avatarMarcin Wojdyr created an issue

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Comments (2)

  1. Marcin Wojdyr

    I've accidentally pressed enter when editing title and the issue was submitted without description. Then I wrote a long comment explaining the problem, but this comment is not displayed. Let's try again.

    conf.py file: https://github.com/wojdyr/fityk/blob/master/doc/conf.py

    It works with python2. If I remove pngmath extension, no exception is thrown. Here is what I get with python3 and pngmath:

    # Sphinx version: 1.1.3
    # Python version: 3.2.3
    # Docutils version: 0.8.1 release
    # Jinja2 version: 2.6
    Traceback (most recent call last):
      File "/usr/lib/python3.2/site-packages/sphinx/cmdline.py", line 189, in main
        app.build(force_all, filenames)
      File "/usr/lib/python3.2/site-packages/sphinx/application.py", line 200, in build
        self.builder.build_all()
      File "/usr/lib/python3.2/site-packages/sphinx/builders/__init__.py", line 159, in build_all
        self.build(None, summary='all source files', method='all')
      File "/usr/lib/python3.2/site-packages/sphinx/builders/__init__.py", line 252, in build
        self.write(docnames, list(updated_docnames), method)
      File "/usr/lib/python3.2/site-packages/sphinx/builders/__init__.py", line 292, in write
        self.write_doc(docname, doctree)
      File "/usr/lib/python3.2/site-packages/sphinx/builders/html.py", line 419, in write_doc
        self.docwriter.write(doctree, destination)
      File "/usr/lib/python3.2/site-packages/docutils/writers/__init__.py", line 77, in write
        self.translate()
      File "/usr/lib/python3.2/site-packages/sphinx/writers/html.py", line 38, in translate
        self.document.walkabout(visitor)
      File "/usr/lib/python3.2/site-packages/docutils/nodes.py", line 173, in walkabout
        if child.walkabout(visitor):
      File "/usr/lib/python3.2/site-packages/docutils/nodes.py", line 173, in walkabout
        if child.walkabout(visitor):
      File "/usr/lib/python3.2/site-packages/docutils/nodes.py", line 173, in walkabout
        if child.walkabout(visitor):
      File "/usr/lib/python3.2/site-packages/docutils/nodes.py", line 165, in walkabout
        visitor.dispatch_visit(self)
      File "/usr/lib/python3.2/site-packages/docutils/nodes.py", line 1604, in dispatch_visit
        return method(node)
      File "/usr/lib/python3.2/site-packages/sphinx/ext/pngmath.py", line 213, in html_visit_displaymath
        fname, depth = render_math(self, latex)
      File "/usr/lib/python3.2/site-packages/sphinx/ext/pngmath.py", line 166, in render_math
        write_png_depth(outfn, depth)
      File "/usr/lib/python3.2/site-packages/sphinx/util/png.py", line 54, in write_png_depth
        f.write(struct.pack('!i', binascii.crc32(DEPTH_CHUNK_START + data)))
    struct.error: 'i' format requires -2147483648 <= number <= 2147483647
    
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