diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6654ac45..fea7ecff 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,15 +5,16 @@
 ### Added
 
 - **aiken-lang**: added optimization to help prevent unnecessary data wraps or unwraps
+- **aiken-lang**: optimization to strip unnecessary lambdas
+- **aiken-lang**: implement Clone for ParseError and tipo::Error for the playground
 - **aiken-project**: added end to end tests on conversion from aiken lang to uplc
 
 ### Fixed
 
-- **aiken-lang**: Add name of var to the unused var warning
-
-### Fixed
-
 - **aiken**: fixed 'new' instructions to properly show project name and folder
+- **aiken-lang**: Add name of var to the unused var warning
+- **aiken-lang**: fix expect on an empty list
+- **aiken-lang**: pattern match on boolean with simple clause bodies
 
 ## v1.0.2.alpha - 2023-04-17
 
diff --git a/crates/aiken-lang/src/parser/error.rs b/crates/aiken-lang/src/parser/error.rs
index e45b3bda..312fc95c 100644
--- a/crates/aiken-lang/src/parser/error.rs
+++ b/crates/aiken-lang/src/parser/error.rs
@@ -4,7 +4,7 @@ use miette::Diagnostic;
 use owo_colors::{OwoColorize, Stream::Stdout};
 use std::collections::HashSet;
 
-#[derive(Debug, Diagnostic, thiserror::Error)]
+#[derive(Debug, Clone, Diagnostic, thiserror::Error)]
 #[error("{kind}\n")]
 pub struct ParseError {
     pub kind: ErrorKind,
@@ -98,7 +98,7 @@ impl<T: Into<Pattern>> chumsky::Error<T> for ParseError {
     }
 }
 
-#[derive(Debug, PartialEq, Eq, Diagnostic, thiserror::Error)]
+#[derive(Debug, Clone, PartialEq, Eq, Diagnostic, thiserror::Error)]
 pub enum ErrorKind {
     #[error("I arrived at the end of the file unexpectedly.")]
     UnexpectedEnd,
@@ -155,7 +155,7 @@ pub enum ErrorKind {
     InvalidWhenClause,
 }
 
-#[derive(Debug, PartialEq, Eq, Hash, Diagnostic, thiserror::Error)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash, Diagnostic, thiserror::Error)]
 pub enum Pattern {
     #[error("I found an unexpected char '{0:?}'.")]
     #[diagnostic(help("Try removing it!"))]
diff --git a/crates/aiken-lang/src/tipo/error.rs b/crates/aiken-lang/src/tipo/error.rs
index 75118c5b..9f403ad1 100644
--- a/crates/aiken-lang/src/tipo/error.rs
+++ b/crates/aiken-lang/src/tipo/error.rs
@@ -15,14 +15,14 @@ use owo_colors::{
 };
 use std::{collections::HashMap, fmt::Display, sync::Arc};
 
-#[derive(Debug, thiserror::Error, Diagnostic)]
+#[derive(Debug, thiserror::Error, Diagnostic, Clone)]
 #[error("Something is possibly wrong here...")]
 pub struct Snippet {
     #[label]
     pub location: Span,
 }
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, Clone, thiserror::Error)]
 #[error(
     "I don't know some of the labels used in this expression. I've highlighted them just below."
 )]
@@ -53,7 +53,7 @@ impl Diagnostic for UnknownLabels {
     }
 }
 
-#[derive(Debug, thiserror::Error, Diagnostic)]
+#[derive(Debug, thiserror::Error, Diagnostic, Clone)]
 pub enum Error {
     #[error("I discovered a type cast from Data without an annotation")]
     #[diagnostic(code("illegal::type_cast"))]