fix corner case in merge_vars (#4324)

fixes #4323
2020-11-28 21:38:24 +00:00
parent 8791f258e3
commit f045e2b460
2 changed files with 37 additions and 0 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -4784,6 +4784,7 @@ merge(Compressor.prototype, {
                        if (node instanceof AST_SymbolFunarg) mark(node, false, true);
                    };
                    var scanner = new TreeWalker(function(ref) {
+                        if (ref instanceof AST_SymbolDeclaration) references[ref.definition().id] = false;
                        if (!(ref instanceof AST_SymbolRef)) return;
                        var def = ref.definition();
                        var ldef = node.variables.get(ref.name);