From 2d2cd7ac03311bddb9645a7ab82c7e78edccbaa0 Mon Sep 17 00:00:00 2001
From: eldritch horrors <pennae@lix.systems>
Date: Sat, 18 Oct 2025 19:43:44 +0200
Subject: [PATCH] libutil: always rethrow kj::CanceledException

the fiber runtime requires this for correctness.

Change-Id: I5ebc6a046596403e86cebaa95962053ff7813877
---
 lix/libutil/serialise-async.hh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lix/libutil/serialise-async.hh b/lix/libutil/serialise-async.hh
index ed091c3ff..14d5499dc 100644
--- a/lix/libutil/serialise-async.hh
+++ b/lix/libutil/serialise-async.hh
@@ -4,6 +4,7 @@
 #include "async-io.hh"
 #include "result.hh"
 #include <kj/async.h>
+#include <kj/exception.h>
 #include <type_traits>
 #include <utility>
 
@@ -79,6 +80,8 @@ inline auto deserializeFrom(AsyncBufferedInputStream & from, auto fn)
                 } else {
                     return fn(wrapped);
                 }
+            } catch (kj::CanceledException &) { // NOLINT(lix-foreign-exceptions)
+                throw; // NOLINT(lix-foreign-exceptions): fiber invariants require this
             } catch (...) {
                 return result::current_exception();
             }