fix rust build

Author: mlin

bindings/rust/src/lib.rs

@@ -123,13 +123,15 @@ pub fn open<P: AsRef<Path>>(path: P, flags: OpenFlags, config: &Object) -> Resul
             },
         };
         let memconn = Connection::open_in_memory().unwrap();
-        let _guard = LoadExtensionGuard::new(&memconn).unwrap();
-        match memconn.load_extension(libgenomicsqlite.clone(), None) {
-            Err(err) => panic!(
-                "genomicsqlite failed to load_extension(\"{}\"): {}",
-                libgenomicsqlite, err
-            ),
-            Ok(()) => (),
+        unsafe {
+            let _guard = LoadExtensionGuard::new(&memconn).unwrap();
+            match memconn.load_extension(libgenomicsqlite.clone(), None) {
+                Err(err) => panic!(
+                    "genomicsqlite failed to load_extension(\"{}\"): {}",
+                    libgenomicsqlite, err
+                ),
+                Ok(()) => (),
+            }
         }
     });