From f22593b82b5d1668d1997dbccd10a9c31ffea3b3 Mon Sep 17 00:00:00 2001
From: Dov Grobgeld <dov.grobgeld@gmail.com>
Date: Fri, 25 Mar 2022 09:09:49 +0300
Subject: [PATCH] Protected against garbage in the CapRTL encoder

---
 lib/fribidi-char-sets-cap-rtl.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/fribidi-char-sets-cap-rtl.c b/lib/fribidi-char-sets-cap-rtl.c
index b0c0e4a..f74e010 100644
--- a/lib/fribidi-char-sets-cap-rtl.c
+++ b/lib/fribidi-char-sets-cap-rtl.c
@@ -232,7 +232,12 @@ fribidi_cap_rtl_to_unicode (
 	    }
 	}
       else
-	us[j++] = caprtl_to_unicode[(int) s[i]];
+      {
+        if ((int)s[i] < 0)
+          us[j++] = '?';
+        else
+          us[j++] = caprtl_to_unicode[(int) s[i]];
+      }
     }
 
   return j;

