mbox: Added an extra assert

diff --git a/src/lib-storage/index/mbox/mbox-sync-rewrite.c b/src/lib-storage/index/mbox/mbox-sync-rewrite.c
index 720b180854e94e7e448b71f8a27187eecad5a4ba..10b12a5d7fbcfe220376a11208d4da7c56268e43 100644 (file)
--- a/src/lib-storage/index/mbox/mbox-sync-rewrite.c
+++ b/src/lib-storage/index/mbox/mbox-sync-rewrite.c
@@ -435,6 +435,7 @@ static int mbox_sync_read_and_move(struct mbox_sync_context *sync_ctx,
        if (first_nonexpunged && expunged_space > 0) {
                /* move From-line (after parsing headers so we don't
                   overwrite them) */
+               i_assert(mails[idx].from_offset >= expunged_space);
                if (mbox_move(sync_ctx, mails[idx].from_offset - expunged_space,
                              mails[idx].from_offset,
                              mails[idx].offset - mails[idx].from_offset) < 0)