fix corner case in ie8 (#5040)

fixes #5039
2021-06-29 19:14:07 +01:00
parent 798121c9f3
commit 4ba8b66c5a
2 changed files with 29 additions and 5 deletions
--- a/test/compress/optional-chains.js
+++ b/test/compress/optional-chains.js
@@ -305,3 +305,25 @@ issue_4947_2: {
    expect_stdout: "PASS"
    node_version: ">=14"
 }
+
+issue_5039: {
+    options = {
+        ie8: true,
+        side_effects: true,
+        toplevel: true,
+        unused: true,
+    }
+    input: {
+        var a = a?.[function f() {
+            f;
+            a;
+        }];
+        console.log("PASS");
+    }
+    expect: {
+        (function f() {});
+        console.log("PASS");
+    }
+    expect_stdout: "PASS"
+    node_version: ">=14"
+}