File flatten.patch of Package nodejs-signal-ringrtc

--- ringrtc-2.59.2/ringrtc/rust/src/lib.rs.orig	2025-10-01 19:22:29.000000000 +0200
+++ ringrtc-2.59.2/ringrtc/rust/src/lib.rs	2025-10-09 12:18:52.732380002 +0200
@@ -11,6 +11,19 @@
 //! call signaling transport.
 //!
 
+//error[E0658]: use of unstable library feature `result_flattening`
+//    --> src/rust/src/webrtc/audio_device_module.rs:1532:14
+//     |
+//1532 |             .flatten()
+//     |              ^^^^^^^
+//     |
+//     = note: see issue #70142 <https://github.com/rust-lang/rust/issues/70142> for more information
+//     = help: add `#![feature(result_flattening)]` to the crate attributes to enable
+//     = note: this compiler was built on 2025-06-23; consider upgrading it if it is out of date
+#![feature(result_flattening)]
+
+
+
 #[macro_use]
 extern crate log;