missed a spot

ferretro_components/examples/multifunction_emulator.rs

@@ -40,7 +40,7 @@ struct Opt {
     trace_api: bool,
 }
 
-pub fn main() -> Result<(), Box<dyn std::error::Error>> {
+pub fn main() -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
     let opt: Opt = Opt::from_args();
 
     let mut emu = RetroComponentBase::new(&opt.core);

ferretro_components/src/provided/ffmpeg.rs

@@ -198,7 +198,7 @@ impl RetroComponent for FfmpegComponent {
         ControlFlow::Continue
     }
 
-    fn post_load_game(&mut self, _retro: &mut LibretroWrapper, _rom: &Path) -> Result<(), Box<dyn Error>> {
+    fn post_load_game(&mut self, _retro: &mut LibretroWrapper, _rom: &Path) -> Result<(), Box<dyn Error + Send + Sync>> {
         self.frame_properties_locked = true;
         Ok(())
     }