lib-index: Fixed extension resizing

Broken by 8483af4ff.

diff --git a/src/lib-index/mail-index-sync-ext.c b/src/lib-index/mail-index-sync-ext.c
index 19beb8cc3f3244de1a491e675369ba2c0dcf22b7..e758e53df3081cd0a0d85311546c93f39e8aa4a7 100644 (file)
--- a/src/lib-index/mail-index-sync-ext.c
+++ b/src/lib-index/mail-index-sync-ext.c
@@ -283,6 +283,8 @@ sync_ext_resize(const struct mail_transaction_ext_intro *u,
        /* something changed. get ourself a new map before we start changing
           anything in it. */
        map = mail_index_sync_get_atomic_map(ctx);
+       /* ext was duplicated to the new map. */
+       ext = array_idx_modifiable(&map->extensions, ext_map_idx);
 
        if (new_padded_hdr_size < old_padded_hdr_size) {
                /* header shrank */