On Sun, Jun 11, 2023 at 08:49:35PM +0200, Rubén Justo wrote:

An interesting point to note is that while string_list_append() is used
in the first two cases described, string_list_append_nodup() is used in
the third.  This seems to indicate an intention to delegate the
responsibility for freeing the string, to the string_list.  As if the
string_list had been initialized with STRING_LIST_INIT_DUP, i.e.  the
strings are strdup()'d when added (except if the "_nodup" API is used)
and freed when cleared.

Switching to STRING_LIST_INIT_DUP fixes the leak and probably is what we
wanted to do originally.  Let's do it.

Ah, clearing a NODUP string-list strikes again. :) I concur with your
reasoning here; switching it to DUP is the best fix.

-Peff