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-rw-r--r--compiler/closureiters.nim2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/closureiters.nim b/compiler/closureiters.nim
index 79038a4f5..a39dd0e71 100644
--- a/compiler/closureiters.nim
+++ b/compiler/closureiters.nim
@@ -1372,6 +1372,7 @@ proc preprocess(c: var PreprocessContext; n: PNode): PNode =
   # detect: 'finally: raises X' which is currently not supported. We produce
   # an error for this case for now. All this will be done properly with Yuriy's
   # patch.
+
   result = n
   case n.kind
   of nkTryStmt:
@@ -1388,6 +1389,7 @@ proc preprocess(c: var PreprocessContext; n: PNode): PNode =
       discard c.finallys.pop()
 
   of nkWhileStmt, nkBlockStmt:
+    if n.hasYields == false: return n
     c.blocks.add((n, c.finallys.len))
     for i in 0 ..< n.len:
       result[i] = preprocess(c, n[i])