re.compile('foo[a-') raises a TypeError exception
instead of re.error.

Python 2.2.1 (#1, Apr  4 2002, 17:22:15) 
[GCC 2.96 20000731 (Mandrake Linux 8.2 2.96-0.76mdk)]
on linux2
Type "help", "copyright", "credits" or "license" for
more information.
>>> import re
>>> re.compile('foo[a-')
Traceback (most recent call last):
  File "<stdin>", line 1, in ?
  File "/usr/local/lib/python2.2/sre.py", line 178, in
compile
    return _compile(pattern, flags)
  File "/usr/local/lib/python2.2/sre.py", line 226, in
_compile
    p = sre_compile.compile(pattern, flags)
  File "/usr/local/lib/python2.2/sre_compile.py", line
430, in compile
    p = sre_parse.parse(p, flags)
  File "/usr/local/lib/python2.2/sre_parse.py", line
623, in parse
    p = _parse_sub(source, pattern, 0)
  File "/usr/local/lib/python2.2/sre_parse.py", line
318, in _parse_sub
    items.append(_parse(source, state))
  File "/usr/local/lib/python2.2/sre_parse.py", line
424, in _parse
    if this[0] == "\\":
TypeError: unsubscriptable object

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Patch below fixes the problem.  Didn't check for end of expression in one case.

Index: dist/src/Lib/sre_parse.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/sre_parse.py,v
retrieving revision 1.55
diff -c -r1.55 sre_parse.py
*** dist/src/Lib/sre_parse.py	2 Jun 2002 00:40:05 -0000	1.55
--- dist/src/Lib/sre_parse.py	4 Feb 2003 19:53:14 -0000
***************
*** 420,429 ****
                          set.append((LITERAL, ord("-")))
                          break
                      else:
!                         if this[0] == "\\":
                              code2 = _class_escape(source, this)
!                         else:
                              code2 = LITERAL, ord(this)
                          if code1[0] != LITERAL or code2[0] != LITERAL:
                              raise error, "bad character range"
                          lo = code1[1]
--- 420,431 ----
                          set.append((LITERAL, ord("-")))
                          break
                      else:
!                         if this and this[0] == "\\":
                              code2 = _class_escape(source, this)
!                         elif this:
                              code2 = LITERAL, ord(this)
+                         else:
+                             raise error, "unexpected end of regular expression"
                          if code1[0] != LITERAL or code2[0] != LITERAL:
                              raise error, "bad character range"
                          lo = code1[1]

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This is fixed in 2.2.2 and 2.3b1.  Closing as out of date.