fix corner case in collapse_vars (#5482)

fixes #5481
2022-06-01 19:42:39 +01:00
parent 3c9e1693d5
commit ad3a331ca3
3 changed files with 38 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -2466,6 +2466,13 @@ Compressor.prototype.compress = function(node) {
                    abort = false;
                    return true;
                }
+                if (node instanceof AST_Class) {
+                    if (!in_try) return false;
+                    var base = node.extends;
+                    if (!base) return false;
+                    if (base instanceof AST_SymbolRef) base = base.fixed_value();
+                    return !safe_for_extends(base);
+                }
                if (node instanceof AST_Exit) {
                    if (in_try) {
                        if (in_try.bfinally) return true;