From 2c9979d6a01b5fb4951f1413ad8468ed10415c64 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 1 May 2009 14:05:31 -0400
Subject: =?UTF-8?q?Bug=20580987=20=E2=80=93=20SIGFPE=20in=20pango=5Fglyph?=
 =?UTF-8?q?=5Fstring=5Findex=5Fto=5Fx?=
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Be pedantic about broken cluster setup, avoid div-by-zero.
---
 pango/glyphstring.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pango/glyphstring.c b/pango/glyphstring.c
index 8fb70313..2e3a9f80 100644
--- a/pango/glyphstring.c
+++ b/pango/glyphstring.c
@@ -506,6 +506,12 @@ pango_glyph_string_index_to_x (PangoGlyphString *glyphs,
   if (trailing)
     cluster_offset += 1;
 
+  if (G_UNLIKELY (!cluster_chars)) /* pedantic */
+    {
+      *x_pos = start_xpos;
+      return;
+    }
+
   *x_pos = ((cluster_chars - cluster_offset) * start_xpos +
 	    cluster_offset * end_xpos) / cluster_chars;
 }
-- 
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