diff --git a/compiler/sempass2.nim b/compiler/sempass2.nim
index 7c6fcf273d..80bccee852 100644
--- a/compiler/sempass2.nim
+++ b/compiler/sempass2.nim
@@ -84,7 +84,7 @@ type
   PEffects = var TEffects
 
 proc throws(tracked: PEffects, n: PNode) =
-  tracked.exc.add n
+  if n.typ.kind != tyError: tracked.exc.add n
   
 proc excType(n: PNode): PType =
   assert n.kind != nkRaiseStmt
@@ -240,9 +240,6 @@ proc track(tracked: PEffects, n: PNode) =
   for i in 0 .. <safeLen(n):
     track(tracked, n.sons[i])
 
-# XXX
-# - more tests
-
 proc checkRaisesSpec(spec, real: PNode) =
   # check that any real exception is listed in 'spec'; mark those as used;
   # report any unused exception