From 18b48e1349033b7c592ab93f4bf1fef909c84cde Mon Sep 17 00:00:00 2001
From: WindSoilder <WindSoilder@outlook.com>
Date: Sun, 17 Nov 2024 20:16:18 +0800
Subject: [PATCH] merge from main

---
 crates/nu-command/tests/commands/mut_.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/crates/nu-command/tests/commands/mut_.rs b/crates/nu-command/tests/commands/mut_.rs
index 52aa9fcff1..107fa62cce 100644
--- a/crates/nu-command/tests/commands/mut_.rs
+++ b/crates/nu-command/tests/commands/mut_.rs
@@ -148,3 +148,14 @@ fn def_should_not_mutate_mut() {
     assert!(actual.err.contains("capture of mutable variable"));
     assert!(!actual.status.success())
 }
+
+#[test]
+fn mut_with_bad_syntax_raises_parse_error() {
+    let actual = nu!("let x = 3; $x = 4");
+    assert!(actual
+        .err
+        .contains("parser::assignment_requires_mutable_variable"));
+
+    let actual = nu!("mut x = 3; x = 5");
+    assert!(actual.err.contains("parser::assignment_requires_variable"));
+}