Index: src/protocols/_speedups.pyx
===================================================================
--- src/protocols/_speedups.pyx (revision 2390)
+++ src/protocols/_speedups.pyx (working copy)
@@ -152,7 +152,7 @@
         PyErr_Clear()
     else:
         err = __Pyx_GetExcValue()
-        raise
+        raise err
 
 
 
@@ -177,7 +177,7 @@
         PyErr_Clear()
     else:
         err = __Pyx_GetExcValue()
-        raise
+        raise err
 
     if default is _marker:
         raise AdaptationFailure("Can't adapt", obj, protocol)
@@ -308,7 +308,7 @@
         else:
             # Some other error, pass it on up the line
             err = __Pyx_GetExcValue()
-            raise
+            raise err
 
     tmp = <void *>0
 
@@ -353,7 +353,7 @@
         # can figure it out.  :(
         else:
             err = __Pyx_GetExcValue()
-            raise
+            raise err