From abc048e3c43ecb25293a29437dc907f21727a5b2 Mon Sep 17 00:00:00 2001
From: Ryan Steinmetz <zi@FreeBSD.org>
Date: Wed, 4 Jul 2018 11:59:55 -0400
Subject: [PATCH] Fix crash when font is missing a character

---
 tdfiglet.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/tdfiglet.c b/tdfiglet.c
index b5b8960..ef34938 100644
--- a/tdfiglet.c
+++ b/tdfiglet.c
@@ -491,7 +491,13 @@ printstr(const char *str, font_t *font)
 		}
 
 		for (int c = 0; c < strlen(str); c++) {
-			glyph_t *g = font->glyphs[lookupchar(str[c], font)];
+			int id = lookupchar(str[c], font);
+
+			if (id == -1) {
+				continue;
+			}
+
+			glyph_t *g = font->glyphs[id];
 			printrow(g, i);
 
 			if (opt.color == COLOR_ANSI) {