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+[[!comment format=mdwn
+ username="http://peter-simons.myopenid.com/"
+ ip="77.186.165.208"
+ subject="comment 3"
+ date="2012-03-05T21:10:47Z"
+ content="""
+Unfortunately, the patch you mentioned doesn't seem to address the problem. I'm getting the following compile error:
+
+    Data/Digest/SHA2.hs:111:4:
+        Could not deduce (Show a) arising from a use of `showHex'
+        from the context (Integral a)
+          bound by the instance declaration at Data/Digest/SHA2.hs:109:10-39
+        Possible fix:
+          add (Show a) to the context of the instance declaration
+        In the first argument of `(.)', namely `(showHex a)'
+        In the expression:
+          (showHex a)
+          . (' ' :)
+            . (showHex b)
+              . (' ' :)
+                . (showHex c)
+                  . (' ' :)
+                    . (showHex d)
+                      . (' ' :)
+                        . (showHex e)
+                          . (' ' :)
+                            . (showHex f) . (' ' :) . (showHex g) . (' ' :) . (showHex h)
+        In an equation for `showsPrec':
+            showsPrec _ (Hash8 a b c d e f g h)
+              = (showHex a)
+                . (' ' :)
+                  . (showHex b)
+                    . (' ' :)
+                      . (showHex c)
+                        . (' ' :)
+                          . (showHex d)
+                            . (' ' :)
+                              . (showHex e)
+                                . (' ' :)
+                                  . (showHex f) . (' ' :) . (showHex g) . (' ' :) . (showHex h)
+
+"""]]