catfs: patch to compile using rust 1.65

pkgs/os-specific/linux/catfs/default.nix

@@ -15,6 +15,11 @@ rustPlatform.buildRustPackage rec {
     hash = "sha256-OvmtU2jpewP5EqPwEFAf67t8UCI1WuzUO2QQj4cH1Ak=";
   };
 
+  patches = [
+    # monitor https://github.com/kahing/catfs/issues/71
+    ./fix-for-rust-1.65.diff
+  ];
+
   cargoHash = "sha256-xF1J2Pr4qtNFcd2kec4tnbdYxoLK+jRnzp8p+cmNOcI=";
 
   nativeBuildInputs = [ pkg-config ];

pkgs/os-specific/linux/catfs/fix-for-rust-1.65.diff

@@ -0,0 +1,13 @@
+diff --git a/src/catfs/file.rs b/src/catfs/file.rs
+index 6e781eb..92fdd80 100644
+--- a/src/catfs/file.rs
++++ b/src/catfs/file.rs
+@@ -569,7 +569,7 @@ impl Handle {
+         path: &dyn AsRef<Path>,
+         create: bool,
+     ) -> error::Result<()> {
+-        let _ = self.page_in_res.0.lock().unwrap();
++        drop(self.page_in_res.0.lock().unwrap());
+ 
+         let mut buf = [0u8; 0];
+         let mut flags = rlibc::O_RDWR;