fix corner case in collapse_vars (#4686)

fixes #4685
2021-02-24 21:31:12 +00:00
parent a5e6946f74
commit 72805ea73a
2 changed files with 24 additions and 1 deletions
--- a/test/compress/arrows.js
+++ b/test/compress/arrows.js
@@ -703,3 +703,24 @@ issue_4666: {
    expect_stdout: "true"
    node_version: ">=4"
 }
+
+issue_4685: {
+    options = {
+        collapse_vars: true,
+        unused: true,
+    }
+    input: {
+        new function(f) {
+            if (f() !== this)
+                console.log("PASS");
+        }(() => this);
+    }
+    expect: {
+        new function(f) {
+            if (f() !== this)
+                console.log("PASS");
+        }(() => this);
+    }
+    expect_stdout: "PASS"
+    node_version: ">=4"
+}