1 files changed, 16 insertions, 5 deletions
diff --git a/src/run/mod.rs b/src/run/mod.rs
index a31ff1a..f727b01 100644
--- a/src/run/mod.rs
+++ b/src/run/mod.rs
@@ -202,6 +202,7 @@ impl Executor {
     ) -> SpawnedCmd {
         match cmd {
             CommandKind::Builtin(builtin) => {
+                let mut builtin = builtin.clone_box();
                 builtin.special(self.se.clone(), &args[1..]);
                 let cloned_session = self.se.clone();
                 let handle = wait::spawn(move || {
@@ -532,7 +533,7 @@ type BuiltinResult = Result<(), BuiltinError>;
 pub trait Builtin: Send + Sync {
     fn name(&self) -> &str;
 
-    fn special(&self, session: Arc<Mutex<Session>>, args: &[BString]) {}
+    fn special(&mut self, session: Arc<Mutex<Session>>, args: &[BString]) {}
 
     fn io(
         &self,
@@ -543,7 +544,17 @@ pub trait Builtin: Send + Sync {
     ) -> BuiltinResult;
 }
 
-const BUILTINS: &[&'static dyn Builtin] = &[
+pub trait BuiltinClone : Builtin {
+    fn clone_box(&self) -> Box<dyn Builtin>;
+}
+
+impl<T: 'static + Builtin + Clone> BuiltinClone for T {
+    fn clone_box(&self) -> Box<dyn Builtin> {
+        Box::new(self.clone())
+    }
+}
+
+const BUILTINS: &[&'static dyn BuiltinClone] = &[
     &builtin::cd,
     &builtin::clear,
     #[cfg(debug_assertions)]
@@ -565,12 +576,12 @@ const BUILTINS: &[&'static dyn Builtin] = &[
     #[cfg(debug_assertions)]
     &builtin::debug,
     &builtin::terminfo,
-    &builtin::bind,
+    &builtin::bind::new(),
     &builtin::exit,
     &builtin::ct,
 ];
 
-pub fn builtin_map() -> HashMap<BString, &'static dyn Builtin> {
+pub fn builtin_map() -> HashMap<BString, &'static dyn BuiltinClone> {
     let mut map = HashMap::new();
     for &b in BUILTINS {
         map.insert(b.name().as_bytes().to_vec(), b);
@@ -580,7 +591,7 @@ pub fn builtin_map() -> HashMap<BString, &'static dyn Builtin> {
 
 #[derive(Clone)]
 pub enum CommandKind {
-    Builtin(&'static dyn Builtin),
+    Builtin(&'static dyn BuiltinClone),
     Fun(Block),
     Path(PathBuf),
 }