Fix a buglet in the error reporting (SF bug report #1546372).

This should probably go into Python 2.5 or 2.5.1 as well.

Tools/pybench/pybench.py

@@ -885,7 +885,7 @@ python pybench.py -s p25.pybench -c p21.pybench
                 else:
                     bench.print_benchmark(hidenoise=hidenoise,
                                           limitnames=limitnames)
-            except IOError:
+            except IOError, reason:
                 print '* Error opening/reading file %s: %s' % (
                     repr(show_bench),
                     reason)
@@ -931,8 +931,13 @@ python pybench.py -s p25.pybench -c p21.pybench
                 bench.name = reportfile
                 pickle.dump(bench,f)
                 f.close()
-            except IOError:
+            except IOError, reason:
                 print '* Error opening/writing reportfile'
+            except IOError, reason:
+                print '* Error opening/writing reportfile %s: %s' % (
+                    reportfile,
+                    reason)
+                print
 
 if __name__ == '__main__':
     PyBenchCmdline()