From cf2c8f627073b438405588be7c32767ad6322b67 Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Sat, 6 Dec 2025 23:15:25 +0000
Subject: [PATCH] Don't observe errors expected during incremental updates.

---
 src/update.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/update.go b/src/update.go
index 8020d9d..99c6ad7 100644
--- a/src/update.go
+++ b/src/update.go
@@ -226,7 +226,12 @@ func PartialUpdateFromArchive(
 }
 
 func observeUpdateResult(result UpdateResult) {
-	if result.err != nil {
+	var unresolvedRefErr UnresolvedRefError
+	if errors.As(result.err, &unresolvedRefErr) {
+		// This error is an expected outcome of an incremental update's probe phase.
+	} else if errors.Is(result.err, ErrWriteConflict) {
+		// This error is an expected outcome of an incremental update losing a race.
+	} else if result.err != nil {
 		ObserveError(result.err)
 	}
 }