fix corner case in collapse_vars (#5870)

fixes #5869
2024-06-28 21:19:58 +03:00
parent 8c5a899986
commit 6b23899ef3
2 changed files with 29 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3327,10 +3327,14 @@ Compressor.prototype.compress = function(node) {
            }

            function update_symbols(value, node) {
+                var clear_defined = node instanceof AST_SymbolRef && !node.defined;
                var scope = node.scope || find_scope(scanner) || block_scope;
                value.walk(new TreeWalker(function(node) {
                    if (node instanceof AST_BlockScope) return true;
-                    if (node instanceof AST_Symbol) node.scope = scope;
+                    if (node instanceof AST_Symbol) {
+                        if (clear_defined && node instanceof AST_SymbolRef) node.defined = false;
+                        node.scope = scope;
+                    }
                }));
            }