From b43c7a1acc5e3989a86098c7c566e85404c40ae5 Mon Sep 17 00:00:00 2001
From: Marshall Lochbaum <mwlochbaum@gmail.com>
Date: Mon, 20 Dec 2021 11:23:59 -0500
Subject: Avoid changing fill of existing array in fill_by

---
 docs/bqn.js | 1 +
 1 file changed, 1 insertion(+)

(limited to 'docs')

diff --git a/docs/bqn.js b/docs/bqn.js
index 15ff86da..0f57b55a 100644
--- a/docs/bqn.js
+++ b/docs/bqn.js
@@ -320,6 +320,7 @@ let fill_by = (f,g) => (x,w) => {
   let a2fill = x => isfunc(x)?x:isnum(x)?0:' ';
   let xf=x.sh?x.fill:a2fill(x);
   if (r.sh&&has(xf)) {
+    r = arr(r.slice(),r.sh);
     try {
       let wf = !has(w) ? w
              : !w.sh ? a2fill(w)
-- 
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