# HG changeset patch
# User Daniel Holth <dholth@fastmail.fm>
# Date 1374332376 14400
# Node ID 2c17870d689e0d3b94e8aa8b58086baf4b1bbfcf
# Parent  6587fd3d89ae9a3f07a021b61da24bb3600736b2
lazily generate zipfile._ZipDecrypter.crctable

diff -r 6587fd3d89ae -r 2c17870d689e Lib/zipfile.py
--- a/Lib/zipfile.py	Thu Jul 11 22:00:57 2013 +0300
+++ b/Lib/zipfile.py	Sat Jul 20 10:59:36 2013 -0400
@@ -475,13 +475,15 @@
                     crc = ((crc >> 1) & 0x7FFFFFFF)
             table[i] = crc
         return table
-    crctable = _GenerateCRCTable()
+    crctable = None
 
     def _crc32(self, ch, crc):
         """Compute the CRC32 primitive on one byte."""
         return ((crc >> 8) & 0xffffff) ^ self.crctable[(crc ^ ch) & 0xff]
 
     def __init__(self, pwd):
+        if not _ZipDecrypter.crctable:
+            _ZipDecrypter.crctable = _ZipDecrypter._GenerateCRCTable()
         self.key0 = 305419896
         self.key1 = 591751049
         self.key2 = 878082192