diff --git a/valuescript_compiler/src/function_compiler.rs b/valuescript_compiler/src/function_compiler.rs
index 7adf12a..6447291 100644
--- a/valuescript_compiler/src/function_compiler.rs
+++ b/valuescript_compiler/src/function_compiler.rs
@@ -8,7 +8,7 @@ use crate::asm::{
   Builtin, Definition, DefinitionContent, FnLine, Function, Instruction, Label, Pointer, Register,
   Value,
 };
-use crate::diagnostic::{Diagnostic, DiagnosticContainer, DiagnosticLevel, DiagnosticReporter};
+use crate::diagnostic::{Diagnostic, DiagnosticContainer, DiagnosticReporter};
 use crate::expression_compiler::CompiledExpression;
 use crate::expression_compiler::ExpressionCompiler;
 use crate::ident::Ident;
@@ -63,7 +63,6 @@ pub struct CatchSetting {
 pub struct FunctionCompiler<'a> {
   pub mc: &'a mut ModuleCompiler,
   pub current: Function,
-  pub definitions: Vec<Definition>,
   pub owner_id: OwnerId,
   pub reg_allocator: RegAllocator,
   pub label_allocator: NameAllocator,
@@ -73,13 +72,11 @@ pub struct FunctionCompiler<'a> {
   pub end_label: Option<Label>,
   pub is_returning_register: Option<Register>,
   pub finally_labels: Vec<Label>,
-
-  pub diagnostics: Vec<Diagnostic>,
 }
 
 impl<'a> DiagnosticContainer for FunctionCompiler<'a> {
   fn diagnostics_mut(&mut self) -> &mut Vec<Diagnostic> {
-    &mut self.diagnostics
+    &mut self.mc.diagnostics
   }
 }
 
@@ -93,7 +90,6 @@ impl<'a> FunctionCompiler<'a> {
     FunctionCompiler {
       mc,
       current: Function::default(),
-      definitions: vec![],
       owner_id,
       reg_allocator,
       label_allocator: NameAllocator::default(),
@@ -103,7 +99,6 @@ impl<'a> FunctionCompiler<'a> {
       end_label: None,
       is_returning_register: None,
       finally_labels: vec![],
-      diagnostics: vec![],
     }
   }
 
@@ -132,11 +127,10 @@ impl<'a> FunctionCompiler<'a> {
     let name = self.mc.scope_analysis.lookup(ident);
 
     if name.is_none() {
-      self.diagnostics.push(Diagnostic {
-        level: DiagnosticLevel::InternalError,
-        message: format!("Could not find name for ident {:?}", ident),
-        span: ident.span,
-      });
+      self.mc.diagnostics.push(Diagnostic::internal_error(
+        ident.span,
+        &format!("Could not find name for ident {:?}", ident),
+      ));
     }
 
     name
@@ -210,7 +204,7 @@ impl<'a> FunctionCompiler<'a> {
     definition_pointer: Pointer,
     fn_name: Option<String>,
     functionish: Functionish,
-  ) -> (Vec<Definition>, Vec<Diagnostic>) {
+  ) {
     let mut self_ = FunctionCompiler::new(mc, functionish.owner_id());
 
     self_
@@ -223,8 +217,6 @@ impl<'a> FunctionCompiler<'a> {
       .expect("Failed to queue function");
 
     self_.process_queue();
-
-    (self_.definitions, self_.diagnostics)
   }
 
   pub fn process_queue(&mut self) {
@@ -333,7 +325,7 @@ impl<'a> FunctionCompiler<'a> {
       self.is_returning_register = None;
     }
 
-    self.definitions.push(Definition {
+    self.mc.module.definitions.push(Definition {
       pointer: definition_pointer,
       content: DefinitionContent::Function(take(&mut self.current)),
     });
@@ -1204,7 +1196,7 @@ impl<'a> FunctionCompiler<'a> {
 
         let enum_value = self.mc.compile_enum_value(ts_enum);
 
-        self.definitions.push(Definition {
+        self.mc.module.definitions.push(Definition {
           pointer,
           content: DefinitionContent::Value(enum_value),
         });
diff --git a/valuescript_compiler/src/module_compiler.rs b/valuescript_compiler/src/module_compiler.rs
index 85a561b..3155324 100644
--- a/valuescript_compiler/src/module_compiler.rs
+++ b/valuescript_compiler/src/module_compiler.rs
@@ -321,13 +321,11 @@ impl ModuleCompiler {
       ));
     }
 
-    let mut fn_defns = self.compile_fn(
+    self.compile_fn(
       pointer,
       Some(fn_name),
       Functionish::Fn(Some(fn_.ident.clone()), fn_.function.clone()),
     );
-
-    self.module.definitions.append(&mut fn_defns);
   }
 
   fn compile_enum_decl(&mut self, export: bool, ts_enum: &swc_ecma_ast::TsEnumDecl) {
@@ -396,13 +394,11 @@ impl ModuleCompiler {
 
         self.module.export_default = Value::Pointer(defn.clone());
 
-        let mut fn_defns = self.compile_fn(
+        self.compile_fn(
           defn,
           fn_name,
           Functionish::Fn(fn_.ident.clone(), fn_.function.clone()),
         );
-
-        self.module.definitions.append(&mut fn_defns);
       }
       DefaultDecl::TsInterfaceDecl(_) => {
         // Nothing to do
@@ -701,13 +697,8 @@ impl ModuleCompiler {
     defn_pointer: Pointer,
     fn_name: Option<String>,
     functionish: Functionish,
-  ) -> Vec<Definition> {
-    let (defn, mut diagnostics) =
-      FunctionCompiler::compile(self, defn_pointer, fn_name, functionish);
-
-    self.diagnostics.append(&mut diagnostics);
-
-    defn
+  ) {
+    FunctionCompiler::compile(self, defn_pointer, fn_name, functionish);
   }
 
   pub fn compile_class(
@@ -719,7 +710,6 @@ impl ModuleCompiler {
     let mut constructor: Value = Value::Void;
     let mut prototype: Object = Object::default();
     let mut static_: Object = Object::default();
-    let mut dependent_definitions: Vec<Definition>;
 
     let defn_name = match ident {
       Some(ident) => match self
@@ -793,7 +783,6 @@ impl ModuleCompiler {
 
     // Include any other definitions that were created by the member initializers
     mi_fnc.process_queue();
-    dependent_definitions = std::mem::take(&mut mi_fnc.definitions);
 
     let mut has_constructor = false;
 
@@ -803,7 +792,7 @@ impl ModuleCompiler {
 
         let ctor_defn_name = self.allocate_defn(&format!("{}_constructor", defn_name.name));
 
-        dependent_definitions.append(&mut self.compile_fn(
+        self.compile_fn(
           ctor_defn_name.clone(),
           None,
           Functionish::Constructor(
@@ -811,7 +800,7 @@ impl ModuleCompiler {
             class.span,
             ctor.clone(),
           ),
-        ));
+        );
 
         constructor = Value::Pointer(ctor_defn_name);
       }
@@ -821,7 +810,7 @@ impl ModuleCompiler {
       let ctor_defn_name = self.allocate_defn(&format!("{}_constructor", defn_name.name));
 
       constructor = Value::Pointer(ctor_defn_name.clone());
-      dependent_definitions.push(Definition {
+      self.module.definitions.push(Definition {
         pointer: ctor_defn_name,
         content: DefinitionContent::Function(Function {
           is_generator: false,
@@ -849,11 +838,11 @@ impl ModuleCompiler {
           let method_defn_name =
             self.allocate_defn(&ident_from_str(&format!("{}_{}", defn_name.name, name)));
 
-          dependent_definitions.append(&mut self.compile_fn(
+          self.compile_fn(
             method_defn_name.clone(),
             None,
             Functionish::Fn(None, method.function.clone()),
-          ));
+          );
 
           let dst = match method.is_static {
             false => &mut prototype,
@@ -892,8 +881,6 @@ impl ModuleCompiler {
       }))),
     });
 
-    self.module.definitions.append(&mut dependent_definitions);
-
     defn_name
   }
 
diff --git a/valuescript_compiler/src/static_expression_compiler.rs b/valuescript_compiler/src/static_expression_compiler.rs
index 4cfa9e9..e251cdf 100644
--- a/valuescript_compiler/src/static_expression_compiler.rs
+++ b/valuescript_compiler/src/static_expression_compiler.rs
@@ -108,14 +108,12 @@ impl<'a> StaticExpressionCompiler<'a> {
                   None => self.mc.allocate_defn_numbered("_anon"),
                 };
 
-                let mut nested_defns = self.mc.compile_fn(
+                self.mc.compile_fn(
                   p.clone(),
                   fn_name.clone(),
                   Functionish::Fn(fn_ident, method.function.clone()),
                 );
 
-                self.mc.module.definitions.append(&mut nested_defns);
-
                 (key, Value::Pointer(p))
               }
             },
@@ -161,22 +159,20 @@ impl<'a> StaticExpressionCompiler<'a> {
           None => self.mc.allocate_defn_numbered("_anon"),
         };
 
-        let mut fn_defns = self.mc.compile_fn(
+        self.mc.compile_fn(
           p.clone(),
           fn_name,
           Functionish::Fn(fn_.ident.clone(), fn_.function.clone()),
         );
 
-        self.mc.module.definitions.append(&mut fn_defns);
-
         Value::Pointer(p)
       }
       swc_ecma_ast::Expr::Arrow(arrow) => {
         let p = self.mc.allocate_defn_numbered("_anon");
-        let mut fn_defns = self
+
+        self
           .mc
           .compile_fn(p.clone(), None, Functionish::Arrow(arrow.clone()));
-        self.mc.module.definitions.append(&mut fn_defns);
 
         Value::Pointer(p)
       }