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-rw-r--r--compiler/sempass2.nim2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/sempass2.nim b/compiler/sempass2.nim
index 272412b04..ef014963c 100644
--- a/compiler/sempass2.nim
+++ b/compiler/sempass2.nim
@@ -855,6 +855,8 @@ proc initEffects(effects: PNode; s: PSym; t: var TEffects) =
   newSeq(effects.sons, effectListLen)
   effects.sons[exceptionEffects] = newNodeI(nkArgList, s.info)
   effects.sons[tagEffects] = newNodeI(nkArgList, s.info)
+  effects.sons[usesEffects] = ast.emptyNode
+  effects.sons[writeEffects] = ast.emptyNode
 
   t.exc = effects.sons[exceptionEffects]
   t.tags = effects.sons[tagEffects]