minor changes

fix-vm/src/lib.rs

@@ -143,6 +143,7 @@ pub struct Vm<'gc> {
     pub(crate) stack: Vec<Value<'gc>>,
     pub(crate) call_stack: Vec<CallFrame<'gc>>,
     pub(crate) call_depth: usize,
+    #[allow(dead_code)]
     #[collect(require_static)]
     pub(crate) error_context: Vec<ErrorFrame>,
 
@@ -332,10 +333,7 @@ impl<'gc> Vm<'gc> {
         reader: &mut BytecodeReader<'_>,
         mc: &Mutation<'gc>,
     ) -> Option<StepResult> {
-        let val = self.peek_stack(depth);
-        let Some(thunk) = val.as_gc::<Thunk>() else {
-            return None;
-        };
+        let thunk = self.peek_stack(depth).as_gc::<Thunk>()?;
         let mut state = thunk.borrow_mut(mc);
         match *state {
             ThunkState::Pending { ip, env, with_env } => {
@@ -425,6 +423,8 @@ impl Vm<'_> {
 }
 
 impl<'gc> Vm<'gc> {
+    const DEFAULT_FUEL_AMOUNT: u32 = 1024;
+
     #[inline(always)]
     fn dispatch_batch<C: VmContext>(
         &mut self,
@@ -461,10 +461,9 @@ impl<'gc> Vm<'gc> {
         mc: &Mutation<'gc>,
     ) -> Action {
         use fix_codegen::Op::*;
-        const DEFAULT_FUEL_AMOUNT: usize = 1024;
 
         let mut reader = BytecodeReader::new(bytecode, pc);
-        let mut fuel = DEFAULT_FUEL_AMOUNT;
+        let mut fuel = Self::DEFAULT_FUEL_AMOUNT;
 
         loop {
             if fuel == 0 {