1 files changed, 16 insertions, 0 deletions
diff --git a/test/compress/collapse_vars.js b/test/compress/collapse_vars.js
index d68c10e2..ff6b9a29 100644
--- a/test/compress/collapse_vars.js
+++ b/test/compress/collapse_vars.js
@@ -8375,3 +8375,19 @@ issue_4038: {
     }
     expect_stdout: "PASS"
 }
+
+issue_4040: {
+    options = {
+        collapse_vars: true,
+        toplevel: true,
+    }
+    input: {
+        var a = console.log("PASS") && a.p;
+        delete NaN;
+    }
+    expect: {
+        var a = console.log("PASS") && a.p;
+        delete NaN;
+    }
+    expect_stdout: "PASS"
+}