[PATCH 3/6] fix memory leaks in notmuch-show.c:format_headers_sprinter()

[David Bremner <david@tethera.net>]

From: Jeffrey Stedfast <jestedfa@microsoft.com>

Internet_address_list_to_string() and
g_mime_message_get_date_as_string() return allocated string buffers
and not const, so from what I can tell from taking a look at the
sprinter-sexp.c’s sexp_string() function, the code leaks the
recipients_string as well as the date string.
---
 notmuch-show.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/notmuch-show.c b/notmuch-show.c
index aff93803..095595e2 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -202,8 +202,9 @@ format_headers_sprinter (sprinter_t *sp, GMimeMessage *message,
      * reflected in the file devel/schemata. */
 
     InternetAddressList *recipients;
-    const char *recipients_string;
+    char *recipients_string;
     const char *reply_to_string;
+    char *date_string;
 
     sp->begin_map (sp);
 
@@ -218,6 +219,7 @@ format_headers_sprinter (sprinter_t *sp, GMimeMessage *message,
     if (recipients_string) {
 	sp->map_key (sp, "To");
 	sp->string (sp, recipients_string);
+	g_free (recipients_string);
     }
 
     recipients = g_mime_message_get_recipients (message, GMIME_RECIPIENT_TYPE_CC);
@@ -225,6 +227,7 @@ format_headers_sprinter (sprinter_t *sp, GMimeMessage *message,
     if (recipients_string) {
 	sp->map_key (sp, "Cc");
 	sp->string (sp, recipients_string);
+	g_free (recipients_string);
     }
 
     recipients = g_mime_message_get_recipients (message, GMIME_RECIPIENT_TYPE_BCC);
@@ -232,6 +235,7 @@ format_headers_sprinter (sprinter_t *sp, GMimeMessage *message,
     if (recipients_string) {
 	sp->map_key (sp, "Bcc");
 	sp->string (sp, recipients_string);
+	g_free (recipients_string);
     }
 
     reply_to_string = g_mime_message_get_reply_to (message);
@@ -248,7 +252,9 @@ format_headers_sprinter (sprinter_t *sp, GMimeMessage *message,
 	sp->string (sp, g_mime_object_get_header (GMIME_OBJECT (message), "References"));
     } else {
 	sp->map_key (sp, "Date");
-	sp->string (sp, g_mime_message_get_date_as_string (message));
+	date_string = g_mime_message_get_date_as_string (message);
+	sp->string (sp, date_string);
+	g_free (date_string);
     }
 
     sp->end (sp);
-- 
2.11.0