thanks to guido's bytecode verifier, this is fixed

Lib/test/crashers/bogus_sre_bytecode.py

-"""
-The regular expression engine in '_sre' can segfault when interpreting
-bogus bytecode.
-
-It is unclear whether this is a real bug or a "won't fix" case like
-bogus_code_obj.py, because it requires bytecode that is built by hand,
-as opposed to compiled by 're' from a string-source regexp.  The
-difference with bogus_code_obj, though, is that the only existing regexp
-compiler is written in Python, so that the C code has no choice but
-accept arbitrary bytecode from Python-level.
-
-The test below builds and runs random bytecodes until 'match' crashes
-Python.  I have not investigated why exactly segfaults occur nor how
-hard they would be to fix.  Here are a few examples of 'code' that
-segfault for me:
-
-    [21, 50814, 8, 29, 16]
-    [21, 3967, 26, 10, 23, 54113]
-    [29, 23, 0, 2, 5]
-    [31, 64351, 0, 28, 3, 22281, 20, 4463, 9, 25, 59154, 15245, 2,
-                  16343, 3, 11600, 24380, 10, 37556, 10, 31, 15, 31]
-
-Here is also a 'code' that triggers an infinite uninterruptible loop:
-
-    [29, 1, 8, 21, 1, 43083, 6]
-
-"""
-
-import _sre, random
-
-def pick():
-    n = random.randrange(-65536, 65536)
-    if n < 0:
-        n &= 31
-    return n
-
-ss = ["", "world", "x" * 500]
-
-while 1:
-    code = [pick() for i in range(random.randrange(5, 25))]
-    print code
-    pat = _sre.compile(None, 0, code)
-    for s in ss:
-        try:
-            pat.match(s)
-        except RuntimeError:
-            pass