diff --git a/src/ipc/server.rs b/src/ipc/server.rs
index 1e886d48..08890d15 100755
--- a/src/ipc/server.rs
+++ b/src/ipc/server.rs
@@ -464,7 +464,7 @@ impl ServerHolder {
             new_mitm_server_fn: self.new_mitm_server_fn,
             handle_type: WaitHandleType::Session,
             mitm_forward_info: mitm_fwd_info,
-            is_mitm_service: forward_handle != 0,
+            is_mitm_service: forward_handle != svc::INVALID_HANDLE,
             service_name: sm::ServiceName::empty(),
             domain_table: self.domain_table.clone(),
         })
@@ -519,20 +519,20 @@ impl ServerHolder {
                             "MitM server objects should always own their handles."
                         );
                         sm.atmosphere_uninstall_mitm(self.service_name)?;
-                    }
-                    else {
+                    } else {
                         sm.unregister_service(self.service_name)?;
                     }
                 }
 
-                if self.is_mitm_service {
-                    sf::Session::from(self.mitm_forward_info).close();
-                }
-
                 sm.detach_client(sf::ProcessId::new())?;
             }
         }
 
+        // Forward info may be valid despite having an empty service name (like a cloned session)
+        if self.is_mitm_service {
+            sf::Session::from(self.mitm_forward_info).close();
+        }
+
         // Don't close our session like a normal one (like the forward session below) as we allocated the object IDs ourselves, the only thing we do have to close is the handle
         if self.info.owns_handle {
             svc::close_handle(self.info.handle)?;
diff --git a/src/thread.rs b/src/thread.rs
index a0cc1370..3fae0206 100755
--- a/src/thread.rs
+++ b/src/thread.rs
@@ -292,23 +292,23 @@ impl Builder {
         f: F,
     ) -> crate::result::Result<JoinHandle<T, WAIT_ON_DROP>>
     where
-        F: FnOnce() -> T,
+        F: FnOnce() -> T + 'static,
         F: Send,
-        T: Send,
+        T: Send + 'static,
     {
         Ok(JoinHandle(unsafe { self.spawn_unchecked_(f, None) }?))
     }
 
     #[allow(unsafe_op_in_unsafe_fn)]
-    unsafe fn spawn_unchecked_<'scope, F, T>(
+    unsafe fn spawn_unchecked_<F, T>(
         self,
         f: F,
         scope_data: Option<Arc<scoped::ScopeData>>,
-    ) -> crate::result::Result<JoinInner<'scope, T>>
+    ) -> crate::result::Result<JoinInner<'static, T>>
     where
-        F: FnOnce() -> T,
+        F: FnOnce() -> T + 'static,
         F: Send,
-        T: Send,
+        T: Send + 'static,
     {
         let Builder {
             name,
@@ -327,7 +327,7 @@ impl Builder {
         let my_thread = Thread::new_inner(name);
         let _their_thread = my_thread.clone();
 
-        let my_packet: Arc<Packet<'scope, T>> = Arc::new(Packet {
+        let my_packet: Arc<Packet<'static, T>> = Arc::new(Packet {
             scope: scope_data,
             result: UnsafeCell::new(None),
             _marker: PhantomData,
@@ -370,7 +370,7 @@ impl Builder {
             // will call `decrement_num_running_threads` and therefore signal that this thread is
             // done.
             drop(their_packet);
-            // Here, the lifetime `'scope` can end. `main` keeps running for a bit
+            // Here, the lifetime `'static` can end. `main` keeps running for a bit
             // after that before returning itself.
         };
 
@@ -803,9 +803,9 @@ impl<T> Drop for Packet<'_, T> {
         // Book-keeping so the scope knows when it's done.
         if let Some(scope) = &self.scope {
             // Now that there will be no more user code running on this thread
-            // that can use 'scope, mark the thread as 'finished'.
+            // that can use 'static, mark the thread as 'finished'.
             // It's important we only do this after the `result` has been dropped,
-            // since dropping it might still use things it borrowed from 'scope.
+            // since dropping it might still use things it borrowed from 'static.
             scope.decrement_num_running_threads(unhandled_panic);
         }
     }
diff --git a/src/thread/scoped.rs b/src/thread/scoped.rs
index 07bf73e9..1350ee44 100755
--- a/src/thread/scoped.rs
+++ b/src/thread/scoped.rs
@@ -189,8 +189,8 @@ impl<'scope> Scope<'scope, '_> {
     /// [`join`]: ScopedJoinHandle::join
     pub fn spawn<F, T>(&'scope self, f: F) -> ScopedJoinHandle<'scope, T>
     where
-        F: FnOnce() -> T + Send + 'scope,
-        T: Send + 'scope,
+        F: FnOnce() -> T + Send + 'scope + 'static,
+        T: Send + 'scope + 'static,
     {
         Builder::new()
             .spawn_scoped(self, f)
@@ -251,8 +251,8 @@ impl Builder {
         f: F,
     ) -> crate::result::Result<ScopedJoinHandle<'scope, T>>
     where
-        F: FnOnce() -> T + Send + 'scope,
-        T: Send + 'scope,
+        F: FnOnce() -> T + Send + 'scope + 'static,
+        T: Send + 'scope + 'static,
     {
         Ok(ScopedJoinHandle(unsafe {
             self.spawn_unchecked_(f, Some(scope.data.clone()))