On Thu, Dec 07, 2017 at 09:22:49PM +0100, René Scharfe wrote: > Use string_list_append_nodup() instead of string_list_append() to hand > over ownership of a detached strbuf and thus avoid leaking its memory. Looks obviously correct (though one thing missing from the diff context is whether "subjects" is set to DUP -- it is, which is good). Grepping for "list_append.*detach" shows a few other possible cases in transport-helper.c, which I think are leaks. I wondered if it would be possible to write a coccinelle rule for this, but I think it's not possible. Whether this is right depends on the strdup_strings flag, which could change at runtime (though in practice it doesn't). -Peff