1 files changed, 12 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/fields/bug1683784.js b/js/src/jit-test/tests/fields/bug1683784.js
new file mode 100644
index 0000000000..02dd277cfb
--- /dev/null
+++ b/js/src/jit-test/tests/fields/bug1683784.js
@@ -0,0 +1,12 @@
+// |jit-test| --enable-private-methods;
+
+class C {
+    #x() { }
+    constructor() { this.#x = 1; }
+}
+
+try {
+    new C
+} catch (e) {
+    assertEq(e.message, "#x is read-only")
+}