fix corner case in hoist_vars (#4900)

fixes #4898
2021-05-02 21:05:52 +01:00
parent 4114431eec
commit 203f4b7ad9
2 changed files with 36 additions and 5 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -8438,12 +8438,20 @@ merge(Compressor.prototype, {
            if (value) {
                if (value instanceof AST_Sequence) value = value.clone();
                var name = make_node(AST_SymbolRef, defn.name, defn.name);
-                name.fixed = value;
-                a.push(make_node(AST_Assign, defn, {
+                var assign = make_node(AST_Assign, defn, {
                    operator: "=",
                    left: name,
                    right: value,
-                }));
+                });
+                a.push(assign);
+                name.fixed = function() {
+                    return assign.right;
+                };
+                name.fixed.assigns = [ assign ];
+                def.references.forEach(function(ref) {
+                    var assigns = ref.fixed && ref.fixed.assigns;
+                    if (assigns && assigns[0] === defn) assigns[0] = assign;
+                });
                def.references.push(name);
            }
            def.eliminated++;