[kbatay]

The editor in 1.42 crashes with the following trace:

Traceback (most recent call last):
  File "/usr/bin/calibre-parallel", line 20, in <module>
    sys.exit(main())
  File "/usr/lib/calibre/calibre/utils/ipc/worker.py", line 195, in main
    result = func(*args, **kwargs)
  File "/usr/lib/calibre/calibre/gui2/tweak_book/main.py", line 30, in gui_main
    _run(['ebook-edit', path], notify=notify)
  File "/usr/lib/calibre/calibre/gui2/tweak_book/main.py", line 51, in _run
    from calibre.gui2.tweak_book.ui import Main
  File "/usr/lib/calibre/calibre/gui2/tweak_book/ui.py", line 37, in <module>
    from calibre.gui2.tweak_book.live_css import LiveCSS
  File "/usr/lib/calibre/calibre/gui2/tweak_book/live_css.py", line 20, in <module>
    from calibre.gui2.tweak_book.editor.text import default_font_family
  File "/usr/lib/calibre/calibre/gui2/tweak_book/editor/text.py", line 24, in <module>
    from calibre.gui2.tweak_book.editor.syntax.html import HTMLHighlighter, XMLHighlighter
  File "/usr/lib/calibre/calibre/gui2/tweak_book/editor/syntax/html.py", line 64, in <module>
    Tag = _speedup.Tag
AttributeError: 'module' object has no attribute 'Tag'

The same editor used to work fine in 1.41. Any hints?