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-rw-r--r--src/encoding/json/encode.go4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/encoding/json/encode.go b/src/encoding/json/encode.go
index 38b98a57f7..9ba717c9ce 100644
--- a/src/encoding/json/encode.go
+++ b/src/encoding/json/encode.go
@@ -969,6 +969,10 @@ func appendString[Bytes []byte | string](dst []byte, src Bytes, escapeHTML bool)
switch b {
case '\\', '"':
dst = append(dst, '\\', b)
+ case '\b':
+ dst = append(dst, '\\', 'b')
+ case '\f':
+ dst = append(dst, '\\', 'f')
case '\n':
dst = append(dst, '\\', 'n')
case '\r':