lib-storage: Clarify keywords handling in mail_save_finish

diff --git a/src/lib-storage/mail-storage.c b/src/lib-storage/mail-storage.c
index 561d1d035643f50ac0e0bd7f22574480d5a5cbc9..a205c1139dd64051814dc8cb0d2f25885371265c 100644 (file)
--- a/src/lib-storage/mail-storage.c
+++ b/src/lib-storage/mail-storage.c
@@ -2368,6 +2368,8 @@ int mailbox_save_finish(struct mail_save_context **_ctx)
 {
        struct mail_save_context *ctx = *_ctx;
        struct mailbox_transaction_context *t = ctx->transaction;
+       /* we need to keep a copy of this because save_finish implementations
+          will likely zero the data structure during cleanup */
        struct mail_keywords *keywords = ctx->data.keywords;
        enum mail_flags pvt_flags = ctx->data.pvt_flags;
        bool copying_via_save = ctx->copying_via_save;