fix corner case in hoist_vars (#4840)

fixes #4839
2021-04-03 03:07:18 +01:00
parent 10fbf8e295
commit 0df028187d
2 changed files with 29 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6937,7 +6937,9 @@ merge(Compressor.prototype, {
                        && vars.has(sym.name)) {
                        var def = vars.get(sym.name);
                        if (def.value) break;
-                        def.value = expr.right.clone();
+                        var value = expr.right;
+                        if (value instanceof AST_Sequence) value = value.clone();
+                        def.value = value;
                        remove(defs, def);
                        defs.push(def);
                        body.shift();