fix corner case in dead_code (#4981)

2021-05-29 20:16:18 +01:00
parent 260431f4e0
commit 8d23496e0f
2 changed files with 42 additions and 1 deletions
--- a/lib/compress.js
+++ b/lib/compress.js
@@ -3638,11 +3638,17 @@ merge(Compressor.prototype, {
    }

    function extract_declarations_from_unreachable_code(compressor, stat, target) {
-        if (!(stat instanceof AST_Definitions || stat instanceof AST_LambdaDefinition)) {
+        if (!(stat instanceof AST_DefClass
+            || stat instanceof AST_Definitions
+            || stat instanceof AST_LambdaDefinition)) {
            AST_Node.warn("Dropping unreachable code [{file}:{line},{col}]", stat.start);
        }
        var block;
        stat.walk(new TreeWalker(function(node, descend) {
+            if (node instanceof AST_DefClass) {
+                push(node);
+                return true;
+            }
            if (node instanceof AST_Definitions) {
                var defns = [];
                if (node.remove_initializers(compressor, defns)) {