fix corner case in reduce_vars (#5464)

fixes #5463
2022-05-23 04:08:12 +01:00
parent c2ca7b7659
commit d4caa97b88
2 changed files with 33 additions and 6 deletions
--- a/test/compress/default-values.js
+++ b/test/compress/default-values.js
@@ -2395,3 +2395,29 @@ issue_5448_4: {
    expect_stdout: "PASS"
    node_version: ">=6"
 }
+
+issue_5463: {
+    options = {
+        collapse_vars: true,
+        conditionals: true,
+        evaluate: true,
+        reduce_vars: true,
+        toplevel: true,
+        unsafe: true,
+    }
+    input: {
+        if (console.log("PASS"))
+            var a = void 0,
+                b = void 0,
+                b = ([ a = FAIL ] = b && b);
+    }
+    expect: {
+        var a, b, b;
+        console.log("PASS") && (
+            b = a = void 0,
+            b = [a = FAIL] = a && a
+        );
+    }
+    expect_stdout: "PASS"
+    node_version: ">=6"
+}