fix corner case in unused (#5080)

fixes #5079
2021-07-14 16:02:45 +01:00
parent 8e2dff632e
commit f18804fa06
2 changed files with 27 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -6366,7 +6366,10 @@ merge(Compressor.prototype, {
                    if (value) {
                        if (props.assign) {
                            var assign = props.assign.drop_side_effect_free(compressor);
-                            if (assign) props.unshift(assign);
+                            if (assign) {
+                                assign.write_only = true;
+                                props.unshift(assign);
+                            }
                        }
                        if (!(parent instanceof AST_Sequence)
                            || parent.tail_node() === node
@@ -6942,7 +6945,6 @@ merge(Compressor.prototype, {
                if (assign) {
                    assign.write_only = true;
                    assign.walk(tw);
-                    assign.write_only = "p";
                }
                props.forEach(function(prop) {
                    prop.walk(tw);