fix corner case in ie (#5193)

fixes #5192
2021-11-24 09:29:26 +00:00
parent 1a8f2ecc65
commit bfd0ac7f4b
2 changed files with 20 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -456,7 +456,7 @@ merge(Compressor.prototype, {
    }

    function can_drop_symbol(ref, compressor, keep_lambda) {
-        var def = ref.definition();
+        var def = ref.redef || ref.definition();
        if (ref.in_arg && is_funarg(def)) return false;
        return all(def.orig, function(sym) {
            if (sym instanceof AST_SymbolConst || sym instanceof AST_SymbolLet) {