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-rw-r--r--compiler/optimizer.nim2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/optimizer.nim b/compiler/optimizer.nim
index d39d598ba..34e8ec80f 100644
--- a/compiler/optimizer.nim
+++ b/compiler/optimizer.nim
@@ -280,7 +280,7 @@ proc optimize*(n: PNode): PNode =
     Now assume 'use' raises, then we shouldn't do the 'wasMoved(s)'
   ]#
   var c: Con = Con()
-  var b: BasicBlock
+  var b: BasicBlock = default(BasicBlock)
   analyse(c, b, n)
   if c.somethingTodo:
     result = shallowCopy(n)