fix corner case in dead_code (#4378)

fixes #4377
2020-12-13 16:03:44 +00:00
parent b309527264
commit fcc40d0502
2 changed files with 27 additions and 2 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3016,7 +3016,7 @@ merge(Compressor.prototype, {
    }

    function extract_declarations_from_unreachable_code(compressor, stat, target) {
-        if (!(stat instanceof AST_Definitions || stat instanceof AST_Defun)) {
+        if (!(stat instanceof AST_Definitions || is_defun(stat))) {
            AST_Node.warn("Dropping unreachable code [{file}:{line},{col}]", stat.start);
        }
        var block;
@@ -3032,7 +3032,7 @@ merge(Compressor.prototype, {
                }
                return true;
            }
-            if (node instanceof AST_Defun) {
+            if (is_defun(node)) {
                push(node);
                return true;
            }