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 a93c859317910b2fc1de343cd5c5de3b48caf7bf..1fd86a9bf66d39e40342979c7508cc77d16d81e9 100644 (file)
--- a/src/lib-storage/mail-storage.c
+++ b/src/lib-storage/mail-storage.c
@@ -2356,6 +2356,8 @@ 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;