imap: APPEND crashed if invalid keyword was given as parameter.

diff --git a/src/imap/cmd-append.c b/src/imap/cmd-append.c
index 128ca30d594efdb3b6a4ffa3531e67047d9e79bb..aa524186e6c8e73fc01040e232b7b4a7c98bc578 100644 (file)
--- a/src/imap/cmd-append.c
+++ b/src/imap/cmd-append.c
@@ -534,6 +534,7 @@ cmd_append_handle_args(struct client_command_context *cmd,
                        /* invalid keywords - delay failure */
                        client_send_box_error(cmd, ctx->box);
                        ctx->failed = TRUE;
+                       keywords = NULL;
                }
        }