Index: zipfile.py
===================================================================
--- zipfile.py	(revisi¢n: 56036)
+++ zipfile.py	(copia de trabajo)
@@ -24,6 +24,7 @@
 
 error = BadZipfile      # The exception raised by this module
 
+UNCOMPRESSED_READ_BUFFER = 2 ** 14
 ZIP64_LIMIT= (1 << 31) - 1
 
 # constants for Zip file compression methods
@@ -713,7 +714,12 @@
         """Read all the files and check the CRC."""
         for zinfo in self.filelist:
             try:
-                self.read(zinfo.filename)       # Check CRC-32
+                # Check CRC-32.
+                input = self.open(zinfo.filename)
+                buf = input.read(UNCOMPRESSED_READ_BUFFER)
+                while buf:
+                    buf = input.read(UNCOMPRESSED_READ_BUFFER)
+                input.close()
             except BadZipfile:
                 return zinfo.filename
 
@@ -1138,8 +1144,11 @@
             print USAGE
             sys.exit(1)
         zf = ZipFile(args[1], 'r')
-        zf.testzip()
-        print "Done testing"
+        ret = zf.testzip()
+        if ret:
+            print "Something went wrong in", ret
+        else:
+            print "Done testing"
 
     elif args[0] == '-e':
         if len(args) != 3: