diff --git a/crates/backend/Cargo.toml b/crates/backend/Cargo.toml
index 7ba51b66b..7b9f5efe3 100644
--- a/crates/backend/Cargo.toml
+++ b/crates/backend/Cargo.toml
@@ -17,5 +17,5 @@ spans = ["proc-macro2/nightly"]
 quote = '0.6'
 proc-macro2 = "0.4"
 wasm-bindgen-shared = { path = "../shared", version = "=0.2.11" }
-syn = { version = '0.14', features = ['full', 'visit-mut'] }
+syn = { version = '0.14', features = ['extra-traits', 'full', 'visit-mut'] }
 serde_json = "1.0"
diff --git a/crates/backend/src/ast.rs b/crates/backend/src/ast.rs
index b047154ff..add3ce191 100644
--- a/crates/backend/src/ast.rs
+++ b/crates/backend/src/ast.rs
@@ -3,7 +3,7 @@ use quote::ToTokens;
 use shared;
 use syn;
 
-#[derive(Default)]
+#[derive(Debug, Default)]
 pub struct Program {
     pub exports: Vec<Export>,
     pub imports: Vec<Import>,
@@ -11,6 +11,7 @@ pub struct Program {
     pub structs: Vec<Struct>,
 }
 
+#[derive(Debug)]
 pub struct Export {
     pub class: Option<Ident>,
     pub method: bool,
@@ -19,6 +20,7 @@ pub struct Export {
     pub function: Function,
 }
 
+#[derive(Debug)]
 pub struct Import {
     pub module: Option<String>,
     pub version: Option<String>,
@@ -26,12 +28,14 @@ pub struct Import {
     pub kind: ImportKind,
 }
 
+#[derive(Debug)]
 pub enum ImportKind {
     Function(ImportFunction),
     Static(ImportStatic),
     Type(ImportType),
 }
 
+#[derive(Debug)]
 pub struct ImportFunction {
     pub function: Function,
     pub rust_name: Ident,
@@ -39,12 +43,14 @@ pub struct ImportFunction {
     pub shim: Ident,
 }
 
+#[derive(Debug)]
 pub enum ImportFunctionKind {
     Method { class: String, ty: syn::Type },
     JsConstructor { class: String, ty: syn::Type },
     Normal,
 }
 
+#[derive(Debug)]
 pub struct ImportStatic {
     pub vis: syn::Visibility,
     pub ty: syn::Type,
@@ -53,11 +59,13 @@ pub struct ImportStatic {
     pub js_name: Ident,
 }
 
+#[derive(Debug)]
 pub struct ImportType {
     pub vis: syn::Visibility,
     pub name: Ident,
 }
 
+#[derive(Debug)]
 pub struct Function {
     pub name: Ident,
     pub arguments: Vec<syn::Type>,
@@ -68,11 +76,13 @@ pub struct Function {
     pub rust_vis: syn::Visibility,
 }
 
+#[derive(Debug)]
 pub struct Struct {
     pub name: Ident,
     pub fields: Vec<StructField>,
 }
 
+#[derive(Debug)]
 pub struct StructField {
     pub opts: BindgenAttrs,
     pub name: Ident,
@@ -82,24 +92,26 @@ pub struct StructField {
     pub setter: Ident,
 }
 
+#[derive(Debug)]
 pub struct Enum {
     pub name: Ident,
     pub variants: Vec<Variant>,
 }
 
+#[derive(Debug)]
 pub struct Variant {
     pub name: Ident,
     pub value: u32,
 }
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub enum TypeKind {
     ByRef,
     ByMutRef,
     ByValue,
 }
 
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 pub enum TypeLocation {
     ImportArgument,
     ImportRet,
@@ -757,7 +769,7 @@ impl StructField {
     }
 }
 
-#[derive(Default)]
+#[derive(Debug, Default)]
 pub struct BindgenAttrs {
     attrs: Vec<BindgenAttr>,
 }
@@ -918,7 +930,7 @@ impl syn::synom::Synom for BindgenAttrs {
     ));
 }
 
-#[derive(PartialEq)]
+#[derive(Debug, PartialEq)]
 enum BindgenAttr {
     Catch,
     Constructor,
diff --git a/crates/backend/src/lib.rs b/crates/backend/src/lib.rs
old mode 100644
new mode 100755
index ab9d46ac0..f3f24428e
--- a/crates/backend/src/lib.rs
+++ b/crates/backend/src/lib.rs
@@ -1,4 +1,5 @@
 #![recursion_limit = "256"]
+#![deny(missing_debug_implementations)]
 
 extern crate proc_macro2;
 #[macro_use]