Fix build

src/optimizer.rs

@@ -841,11 +841,13 @@ fn optimize_stmt(stmt: &mut Stmt, state: &mut OptimizerState, preserve_result: b
         Stmt::Return(Some(ref mut expr), ..) => optimize_expr(expr, state, false),
 
         // Share nothing
+        #[cfg(not(feature = "no_closure"))]
         Stmt::Share(x) if x.is_empty() => {
             state.set_dirty();
             *stmt = Stmt::Noop(Position::NONE);
         }
         // Share constants
+        #[cfg(not(feature = "no_closure"))]
         Stmt::Share(x) => {
             let len = x.len();
             x.retain(|(v, _, _)| !state.find_constant(v).is_some());