feat: less clone, avoid evaluating not depended thunk

src/ty/internal/func.rs

@@ -1,15 +1,15 @@
 use std::rc::Rc;
 
-use crate::env::VmEnv;
+use crate::env::Env;
 
 use crate::ir;
 pub struct Func<'gc> {
     pub func: &'gc ir::Func,
-    pub env: Rc<VmEnv>,
+    pub env: Rc<Env>,
 }
 
 impl<'gc> Func<'gc> {
-    pub fn new(func: &'gc ir::Func, env: Rc<VmEnv>) -> Self {
+    pub fn new(func: &'gc ir::Func, env: Rc<Env>) -> Self {
         Self { func, env }
     }
 }