From 5bd105f26a0772658dc2b358862ea01f5bb340ed Mon Sep 17 00:00:00 2001
From: Denis Cornehl <denis@cornehl.org>
Date: Mon, 24 Nov 2025 20:26:50 +0100
Subject: [PATCH] fix endless loop when generating fastly invalidations

---
 src/cdn/fastly.rs | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/cdn/fastly.rs b/src/cdn/fastly.rs
index dfb7f6667..fd532ba01 100644
--- a/src/cdn/fastly.rs
+++ b/src/cdn/fastly.rs
@@ -46,9 +46,13 @@ where
         // SurrogateKeys::from_iter::until_full only consumes as many elements as will fit into
         // the header.
         // The rest is up to the next `batching` iteration.
-        Some(SurrogateKeys::from_iter_until_full(
-            it.take(MAX_SURROGATE_KEYS_IN_BATCH_PURGE),
-        ))
+        let keys = SurrogateKeys::from_iter_until_full(it.take(MAX_SURROGATE_KEYS_IN_BATCH_PURGE));
+
+        if keys.key_count() > 0 {
+            Some(keys)
+        } else {
+            None
+        }
     }) {
         for sid in config
             .fastly_service_sid_web