fixes #2476

tests/exception/texceptions.nim

@@ -35,9 +35,9 @@ echo ""
 proc reraise_in_except =
   try:
     echo "BEFORE"
-    raise newException(EIO, "")
+    raise newException(IOError, "")
 
-  except EIO:
+  except IOError:
     echo "EXCEPT"
     raise
 
@@ -52,7 +52,7 @@ echo ""
 proc return_in_except =
   try:
     echo "BEFORE"
-    raise newException(EIO, "")
+    raise newException(IOError, "")
 
   except:
     echo "EXCEPT"

tests/exception/treraise.nim

@@ -4,8 +4,8 @@ discard """
   exitcode: "1"
 """
 type
-  ESomething = object of E_Base
-  ESomeOtherErr = object of E_Base
+  ESomething = object of Exception
+  ESomeOtherErr = object of Exception
 
 proc genErrors(s: string) =
   if s == "error!":