From b874ba0d5c652639abd5e96c204a1877da462d5c Mon Sep 17 00:00:00 2001
From: bi4k8 <bi4k8-js7gsE3b01w@mt2015.com>
Date: Mon, 10 Apr 2023 17:43:46 +0000
Subject: [PATCH] display-wayland: avoid crash when font has no family
 specified (#1498)

Co-authored-by: bi4k8 <bi4k8@github>
---
 src/display-wayland.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/display-wayland.cc b/src/display-wayland.cc
index 9090922f..f1d8261a 100644
--- a/src/display-wayland.cc
+++ b/src/display-wayland.cc
@@ -866,6 +866,12 @@ void display_output_wayland::load_fonts(bool utf8) {
     auto &pango_font_entry = pango_fonts[i];
     FcPattern *fc_pattern =
         FcNameParse(reinterpret_cast<const unsigned char *>(font.name.c_str()));
+    // pango_fc_font_description_from_pattern requires a FAMILY to be set,
+    // so set an empty one if none is present.
+    FcValue dummy;
+    if (FcPatternGet (fc_pattern, FC_FAMILY, 0, &dummy) != FcResultMatch) {
+        FcPatternAddString (fc_pattern, FC_FAMILY, (FcChar8 *) "");
+    }
     pango_font_entry.desc =
         pango_fc_font_description_from_pattern(fc_pattern, true);