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-rw-r--r--src/interp/i-special.boot2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/interp/i-special.boot b/src/interp/i-special.boot
index 5a7a4607..a167f8e3 100644
--- a/src/interp/i-special.boot
+++ b/src/interp/i-special.boot
@@ -2162,7 +2162,7 @@ transformREPEAT [:itrl,body] ==
[["SUCHTHAT",mkAtree1 pred]]
it is [op,:.] and (op in '(VALUE UNTIL)) => nil
bodyTree:=mkAtree1 body
- iterList:=NCONC(iterList,[:iterTran2 for it in itrl]) where iterTran2() ==
+ iterList:=append!(iterList,[:iterTran2 for it in itrl]) where iterTran2() ==
it is ["STEP",:.] => nil
it is ["IN",:.] => nil
it is ["ON",:.] => nil