diff --git a/nac3core/src/codegen/mod.rs b/nac3core/src/codegen/mod.rs
index 9ca1cb58..de9ff948 100644
--- a/nac3core/src/codegen/mod.rs
+++ b/nac3core/src/codegen/mod.rs
@@ -62,44 +62,53 @@ fn get_llvm_type<'ctx>(
     use TypeEnum::*;
     // we assume the type cache should already contain primitive types,
     // and they should be passed by value instead of passing as pointer.
-    type_cache.get(&unifier.get_representative(ty)).cloned().unwrap_or_else(|| match &*unifier.get_ty(ty) {
-        TObj { obj_id, fields, .. } => {
-            // a struct with fields in the order of declaration
-            let defs = top_level.definitions.read();
-            let definition = defs.get(obj_id.0).unwrap();
-            let ty = if let TopLevelDef::Class { fields: fields_list, .. } = &*definition.read() {
-                let fields = fields.borrow();
-                let fields = fields_list
+    type_cache.get(&unifier.get_representative(ty)).cloned().unwrap_or_else(|| {
+        match &*unifier.get_ty(ty) {
+            TObj { obj_id, fields, .. } => {
+                // a struct with fields in the order of declaration
+                let defs = top_level.definitions.read();
+                let definition = defs.get(obj_id.0).unwrap();
+                let ty = if let TopLevelDef::Class { fields: fields_list, .. } = &*definition.read()
+                {
+                    let fields = fields.borrow();
+                    let fields = fields_list
+                        .iter()
+                        .map(|f| get_llvm_type(ctx, unifier, top_level, type_cache, fields[&f.0]))
+                        .collect_vec();
+                    ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
+                } else {
+                    unreachable!()
+                };
+                ty
+            }
+            TTuple { ty } => {
+                // a struct with fields in the order present in the tuple
+                let fields = ty
                     .iter()
-                    .map(|f| get_llvm_type(ctx, unifier, top_level, type_cache, fields[&f.0]))
+                    .map(|ty| get_llvm_type(ctx, unifier, top_level, type_cache, *ty))
                     .collect_vec();
                 ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
-            } else {
-                unreachable!()
-            };
-            ty
+            }
+            TList { ty } => {
+                // a struct with an integer and a pointer to an array
+                let element_type = get_llvm_type(ctx, unifier, top_level, type_cache, *ty);
+                let fields =
+                    [ctx.i32_type().into(), element_type.ptr_type(AddressSpace::Generic).into()];
+                ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
+            }
+            TVirtual { .. } => unimplemented!(),
+            _ => unreachable!(),
         }
-        TTuple { ty } => {
-            // a struct with fields in the order present in the tuple
-            let fields = ty
-                .iter()
-                .map(|ty| get_llvm_type(ctx, unifier, top_level, type_cache, *ty))
-                .collect_vec();
-            ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
-        }
-        TList { ty } => {
-            // a struct with an integer and a pointer to an array
-            let element_type = get_llvm_type(ctx, unifier, top_level, type_cache, *ty);
-            let fields =
-                [ctx.i32_type().into(), element_type.ptr_type(AddressSpace::Generic).into()];
-            ctx.struct_type(&fields, false).ptr_type(AddressSpace::Generic).into()
-        }
-        TVirtual { .. } => unimplemented!(),
-        _ => unreachable!(),
     })
 }
 
-pub fn gen_func<'ctx>(context: &'ctx Context, builder: Builder<'ctx>, module: Module<'ctx>, task: CodeGenTask, top_level_ctx: Arc<TopLevelContext>) -> Module<'ctx> {
+pub fn gen_func<'ctx>(
+    context: &'ctx Context,
+    builder: Builder<'ctx>,
+    module: Module<'ctx>,
+    task: CodeGenTask,
+    top_level_ctx: Arc<TopLevelContext>,
+) -> Module<'ctx> {
     // unwrap_or(0) is for unit tests without using rayon
     let (mut unifier, primitives) = {
         let unifiers = top_level_ctx.unifiers.read();
diff --git a/nac3core/src/symbol_resolver.rs b/nac3core/src/symbol_resolver.rs
index 3063eaab..e539ef14 100644
--- a/nac3core/src/symbol_resolver.rs
+++ b/nac3core/src/symbol_resolver.rs
@@ -95,15 +95,20 @@ pub fn parse_type_annotation<T>(
         Subscript { value, slice, .. } => {
             if let Name { id, .. } = &value.node {
                 if id == "virtual" {
-                    let ty = parse_type_annotation(resolver, top_level, unifier, primitives, slice)?;
+                    let ty =
+                        parse_type_annotation(resolver, top_level, unifier, primitives, slice)?;
                     Ok(unifier.add_ty(TypeEnum::TVirtual { ty }))
                 } else {
                     let types = if let Tuple { elts, .. } = &slice.node {
                         elts.iter()
-                            .map(|v| parse_type_annotation(resolver, top_level, unifier, primitives, v))
+                            .map(|v| {
+                                parse_type_annotation(resolver, top_level, unifier, primitives, v)
+                            })
                             .collect::<Result<Vec<_>, _>>()?
                     } else {
-                        vec![parse_type_annotation(resolver, top_level, unifier, primitives, slice)?]
+                        vec![parse_type_annotation(
+                            resolver, top_level, unifier, primitives, slice,
+                        )?]
                     };
 
                     let obj_id = resolver
diff --git a/nac3core/src/typecheck/typedef/mod.rs b/nac3core/src/typecheck/typedef/mod.rs
index 979213ad..d2e75c8a 100644
--- a/nac3core/src/typecheck/typedef/mod.rs
+++ b/nac3core/src/typecheck/typedef/mod.rs
@@ -696,7 +696,11 @@ impl Unifier {
                     let fields = self
                         .subst_map(&fields.borrow(), mapping)
                         .unwrap_or_else(|| fields.borrow().clone());
-                    Some(self.add_ty(TypeEnum::TObj { obj_id, params: params.into(), fields: fields.into() }))
+                    Some(self.add_ty(TypeEnum::TObj {
+                        obj_id,
+                        params: params.into(),
+                        fields: fields.into(),
+                    }))
                 } else {
                     None
                 }