fix corner case in loops & unused (#4241)

fixes #4240
2020-10-24 06:33:48 +01:00
parent ff38d2471f
commit c5df8355ba
2 changed files with 33 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -5182,7 +5182,7 @@ merge(Compressor.prototype, {
                var def = sym.definition();
                if (!def) return;
                if (def.id in in_use_ids) return;
-                if (def.scope !== self && member(def, self.enclosed)) return;
+                if (def.scope !== self && self.find_variable(sym) === def) return;
                log(sym, "Dropping unused loop variable {name}");
                if (for_ins[def.id] === node) delete for_ins[def.id];
                var body = [];