[pypy-svn] r16752 - pypy/dist/pypy/module/_sre

[nik at codespeak.net]

Author: nik
Date: Sat Aug 27 14:09:35 2005
New Revision: 16752

Modified:
   pypy/dist/pypy/module/_sre/interp_sre.py
Log:
uhm, also prove slice stops non-negative ...


Modified: pypy/dist/pypy/module/_sre/interp_sre.py
==============================================================================
--- pypy/dist/pypy/module/_sre/interp_sre.py	(original)
+++ pypy/dist/pypy/module/_sre/interp_sre.py	Sat Aug 27 14:09:35 2005
@@ -282,12 +282,15 @@
     # <5=length> <6=skip> <7=prefix data> <overlap data>
     flags = pattern_codes[2]
     prefix_len = pattern_codes[5]
+    assert prefix_len >= 0
     prefix_skip = pattern_codes[6] # don't really know what this is good for
     assert prefix_skip >= 0
     prefix = pattern_codes[7:7 + prefix_len]
     overlap_offset = 7 + prefix_len - 1
+    overlap_stop = pattern_codes[1] + 1
     assert overlap_offset >= 0
-    overlap = pattern_codes[overlap_offset:pattern_codes[1] + 1]
+    assert overlap_stop >= 0
+    overlap = pattern_codes[overlap_offset:overlap_stop]
     pattern_offset = pattern_codes[1] + 1
     assert pattern_offset >= 0
     pattern_codes = pattern_codes[pattern_offset:]