Merged revisions 63634-63643 via svnmerge from

svn+ssh://pythondev@svn.python.org/sandbox/trunk/2to3/lib2to3

........
  r63643 | martin.v.loewis | 2008-05-25 19:18:21 +0200 (So, 25 Mai 2008) | 3 lines

  Don't abort on IOErrors caused by saving pickle files.
  Fixes #2938.
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Lib/lib2to3/pgen2/driver.py

@@ -126,7 +126,10 @@ def load_grammar(gt="Grammar.txt", gp=None,
         g = pgen.generate_grammar(gt)
         if save:
             logger.info("Writing grammar tables to %s", gp)
-            g.dump(gp)
+            try:
+                g.dump(gp)
+            except IOError, e:
+                logger.info("Writing failed:"+str(e))
     else:
         g = grammar.Grammar()
         g.load(gp)