Exit *_incoming_msg functions when plain message is empty

Fix https://github.com/profanity-im/profanity/issues/1733

3 files changed, 17 insertions, 0 deletions

diff --git a/src/ui/chatwin.c b/src/ui/chatwin.c
index c7cf8ddb..32fd3553 100644
--- a/src/ui/chatwin.c
+++ b/src/ui/chatwin.c
@@ -310,6 +310,12 @@ void
 chatwin_incoming_msg(ProfChatWin* chatwin, ProfMessage* message, gboolean win_created)
 {
     assert(chatwin != NULL);
+
+    if (message->plain == NULL) {
+        log_error("chatwin_incoming_msg: Message with no plain field from: %s", message->from_jid);
+        return;
+    }
+
     char* old_plain = message->plain;
 
     message->plain = plugins_pre_chat_message_display(message->from_jid->barejid, message->from_jid->resourcepart, message->plain);
diff --git a/src/ui/mucwin.c b/src/ui/mucwin.c
index b48a4a54..3c4d7447 100644
--- a/src/ui/mucwin.c
+++ b/src/ui/mucwin.c
@@ -551,6 +551,11 @@ mucwin_incoming_msg(ProfMucWin* mucwin, const ProfMessage* const message, GSList
     assert(mucwin != NULL);
     int flags = 0;
 
+    if (message->plain == NULL) {
+        log_error("mucwin_incoming_msg: Message with no plain field from: %s", message->from_jid);
+        return;
+    }
+
     if (filter_reflection && message_is_sent_by_us(message, TRUE)) {
         /* Ignore reflection messages */
         return;
diff --git a/src/ui/privwin.c b/src/ui/privwin.c
index 20611ea4..b683a839 100644
--- a/src/ui/privwin.c
+++ b/src/ui/privwin.c
@@ -39,6 +39,7 @@
 #include <glib.h>
 #include <stdlib.h>
 
+#include "log.h"
 #include "config/preferences.h"
 #include "ui/win_types.h"
 #include "ui/window.h"
@@ -50,6 +51,11 @@ privwin_incoming_msg(ProfPrivateWin* privatewin, ProfMessage* message)
 {
     assert(privatewin != NULL);
 
+    if (message->plain == NULL) {
+        log_error("privwin_incoming_msg: Message with no plain field from: %s", message->from_jid);
+        return;
+    }
+
     ProfWin* window = (ProfWin*)privatewin;
     int num = wins_get_num(window);