diff --git a/source/ports/rs_port/src/helpers.rs b/source/ports/rs_port/src/helpers.rs
index 8dc754416..69cfb132c 100644
--- a/source/ports/rs_port/src/helpers.rs
+++ b/source/ports/rs_port/src/helpers.rs
@@ -89,22 +89,22 @@ where
         Box::<[T]>::into_raw(self.iter().cloned().collect()) as *mut ()
     }
 }
-impl<'c> Clone for Box<dyn MetaCallValue + 'c> {
+impl Clone for Box<dyn MetaCallValue + '_> {
     fn clone(&self) -> Self {
         clone_box(&**self)
     }
 }
-impl<'c> Clone for Box<dyn MetaCallValue + Send + 'c> {
+impl Clone for Box<dyn MetaCallValue + Send + '_> {
     fn clone(&self) -> Self {
         clone_box(&**self)
     }
 }
-impl<'c> Clone for Box<dyn MetaCallValue + Sync + 'c> {
+impl Clone for Box<dyn MetaCallValue + Sync + '_> {
     fn clone(&self) -> Self {
         clone_box(&**self)
     }
 }
-impl<'c> Clone for Box<dyn MetaCallValue + Send + Sync + 'c> {
+impl Clone for Box<dyn MetaCallValue + Send + Sync + '_> {
     fn clone(&self) -> Self {
         clone_box(&**self)
     }
diff --git a/source/ports/rs_port/src/types/metacall_error.rs b/source/ports/rs_port/src/types/metacall_error.rs
index 51b5e6006..7c3e85484 100644
--- a/source/ports/rs_port/src/types/metacall_error.rs
+++ b/source/ports/rs_port/src/types/metacall_error.rs
@@ -1,5 +1,5 @@
 use super::MetaCallValue;
-use std::{ffi::NulError, path::PathBuf};
+use std::{ffi::NulError, fmt, path::PathBuf};
 
 #[derive(Debug, Clone)]
 /// This error happens when it's not possible to initialize the MetaCall core. You can check
@@ -16,9 +16,9 @@ impl Default for MetaCallInitError {
         MetaCallInitError::new()
     }
 }
-impl ToString for MetaCallInitError {
-    fn to_string(&self) -> String {
-        String::from("Failed to initialize MetaCall!")
+impl fmt::Display for MetaCallInitError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(f, "Failed to initialize MetaCall")
     }
 }
 
@@ -38,9 +38,13 @@ impl MetaCallStringConversionError {
         }
     }
 }
-impl ToString for MetaCallStringConversionError {
-    fn to_string(&self) -> String {
-        self.original_string.clone()
+impl fmt::Display for MetaCallStringConversionError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
+            "Failed to convert string: {}",
+            self.original_string.clone()
+        )
     }
 }
 
diff --git a/source/ports/rs_port/src/types/metacall_exception.rs b/source/ports/rs_port/src/types/metacall_exception.rs
index 67a34e15a..56905d9e5 100644
--- a/source/ports/rs_port/src/types/metacall_exception.rs
+++ b/source/ports/rs_port/src/types/metacall_exception.rs
@@ -12,14 +12,19 @@ use std::{
     sync::Arc,
 };
 
+unsafe impl Send for metacall_exception_type {}
+unsafe impl Sync for metacall_exception_type {}
+
 /// Represents MetaCall exception. You can create an exception with [new](#method.new).
 pub struct MetaCallException {
     exception_struct: Arc<metacall_exception_type>,
     leak: bool,
     value: *mut c_void,
 }
+
 unsafe impl Send for MetaCallException {}
 unsafe impl Sync for MetaCallException {}
+
 impl Clone for MetaCallException {
     fn clone(&self) -> Self {
         Self {
@@ -31,11 +36,7 @@ impl Clone for MetaCallException {
 }
 impl Debug for MetaCallException {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "MetaCallException {}",
-            format!("{{ {} }}", self.to_string())
-        )
+        write!(f, "MetaCallException: {}", self)
     }
 }
 
@@ -146,11 +147,7 @@ impl Clone for MetaCallThrowable {
 }
 impl Debug for MetaCallThrowable {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
-        write!(
-            f,
-            "MetaCallThrowable {}",
-            format!("{{ {} }}", self.to_string())
-        )
+        write!(f, "MetaCallThrowable: {}", self)
     }
 }
 
@@ -205,19 +202,21 @@ impl MetaCallThrowable {
     }
 }
 
-impl ToString for MetaCallException {
-    fn to_string(&self) -> String {
-        format!(
+impl fmt::Display for MetaCallException {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        write!(
+            f,
             "[Exception(code: `{}`)]: {}",
             self.get_code(),
             self.get_message()
         )
     }
 }
-impl ToString for MetaCallThrowable {
-    fn to_string(&self) -> String {
+
+impl fmt::Display for MetaCallThrowable {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let throwable_value = self.get_value_untyped();
-        format!("[Throwable]: {:#?}", throwable_value)
+        write!(f, "[Throwable]: {:#?}", throwable_value)
     }
 }
 
diff --git a/source/ports/rs_port/src/types/metacall_pointer.rs b/source/ports/rs_port/src/types/metacall_pointer.rs
index 802aa153a..55ccc6386 100644
--- a/source/ports/rs_port/src/types/metacall_pointer.rs
+++ b/source/ports/rs_port/src/types/metacall_pointer.rs
@@ -22,7 +22,7 @@ impl Clone for MetaCallPointer {
     fn clone(&self) -> Self {
         Self {
             leak: true,
-            rust_value: self.rust_value.clone(),
+            rust_value: self.rust_value,
             rust_value_leak: true,
             value: self.value,
         }