From ed4072bdd13262ff54bab86e08192163dad41b6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Konstantin=20Ka=CC=88fer?= <mail@kkaefer.com>
Date: Thu, 6 Feb 2014 09:47:12 +0100
Subject: [PATCH] skip unknown glyphs

---
 src/geometry/debug_font_buffer.cpp | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/geometry/debug_font_buffer.cpp b/src/geometry/debug_font_buffer.cpp
index ba180ff60..de0394c11 100644
--- a/src/geometry/debug_font_buffer.cpp
+++ b/src/geometry/debug_font_buffer.cpp
@@ -26,7 +26,13 @@ void DebugFontBuffer::addText(const char *text, double left, double baseline, do
         if (text[i] < 32 || text[i] > 127) {
             continue;
         }
-        glyph& glyph = simplex[(int)text[i]];
+
+        auto it = simplex.find((int)text[i]);
+        if (it == simplex.end()) {
+            continue;
+        }
+
+        const glyph& glyph = it->second;
         if (!glyph.width) {
             continue;
         }