diff --git a/src/runtime/src/comms.rs b/src/runtime/src/comms.rs
index f90b6de..00a2b6f 100644
--- a/src/runtime/src/comms.rs
+++ b/src/runtime/src/comms.rs
@@ -224,13 +224,14 @@ async fn handle_run_kernel(stream: Option<&TcpStream>, control: &Rc<RefCell<kern
                     }
                 }
             },
-            kernel::Message::KernelFinished => {
+            kernel::Message::KernelFinished { async_errors } => {
                 if let Some(stream) = stream {
                     write_header(stream, Reply::KernelFinished).await?;
+                    write_i8(stream, async_errors as i8).await?;
                 }
                 break;
             },
-            kernel::Message::KernelException(exception, backtrace) => {
+            kernel::Message::KernelException(exception, backtrace, async_errors) => {
                 match stream {
                     Some(stream) => {
                         // only send the exception data to host if there is host,
@@ -249,6 +250,7 @@ async fn handle_run_kernel(stream: Option<&TcpStream>, control: &Rc<RefCell<kern
                         for &addr in backtrace {
                             write_i32(stream, addr as i32).await?;
                         }
+                        write_i8(stream, async_errors as i8).await?;
                     },
                     None => {
                         error!("Uncaught kernel exception: {:?}", exception);
diff --git a/src/runtime/src/kernel/core1.rs b/src/runtime/src/kernel/core1.rs
index 91a8dd9..ab6a428 100644
--- a/src/runtime/src/kernel/core1.rs
+++ b/src/runtime/src/kernel/core1.rs
@@ -14,7 +14,7 @@ use libcortex_a9::{
 use libboard_zynq::{mpcore, gic};
 use libsupport_zynq::ram;
 use dyld::{self, Library};
-use crate::{eh_artiq, rtio};
+use crate::{eh_artiq, get_async_errors, rtio};
 use super::{
     api::resolve,
     rpc::rpc_send_async,
@@ -192,7 +192,8 @@ pub extern "C" fn main_core1() {
                     }
                 }
                 info!("kernel finished");
-                core1_tx.send(Message::KernelFinished);
+                let async_errors = unsafe { get_async_errors() };
+                core1_tx.send(Message::KernelFinished { async_errors });
             }
             _ => error!("Core1 received unexpected message: {:?}", message),
         }
@@ -216,7 +217,8 @@ pub fn terminate(exception: &'static eh_artiq::Exception<'static>, backtrace: &'
 
     {
         let core1_tx = unsafe { KERNEL_CHANNEL_1TO0.as_mut().unwrap() };
-        core1_tx.send(Message::KernelException(exception, &backtrace[..cursor]));
+        let errors = unsafe { get_async_errors() };
+        core1_tx.send(Message::KernelException(exception, &backtrace[..cursor], errors));
     }
     loop {}
 }
diff --git a/src/runtime/src/kernel/mod.rs b/src/runtime/src/kernel/mod.rs
index c3bb1fb..3ca8bf6 100644
--- a/src/runtime/src/kernel/mod.rs
+++ b/src/runtime/src/kernel/mod.rs
@@ -30,8 +30,10 @@ pub enum Message {
     LoadCompleted,
     LoadFailed,
     StartRequest,
-    KernelFinished,
-    KernelException(&'static eh_artiq::Exception<'static>, &'static [usize]),
+    KernelFinished {
+        async_errors: u8
+    },
+    KernelException(&'static eh_artiq::Exception<'static>, &'static [usize], u8),
     RpcSend { is_async: bool, data: Vec<u8> },
     RpcRecvRequest(*mut ()),
     RpcRecvReply(Result<usize, RPCException>),