From 14a639ea592cba971e5548f0942dd395c602c7a8 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Fri, 11 Aug 2017 11:30:39 -0700
Subject: [PATCH] [unsafe-to-break] Fix Use-of-uninitialized-value in
 unsafe_to_break_set_mask

Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=3011
---
 src/hb-ot-shape-complex-hangul.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hb-ot-shape-complex-hangul.cc b/src/hb-ot-shape-complex-hangul.cc
index a90af3fd5..0e74802ee 100644
--- a/src/hb-ot-shape-complex-hangul.cc
+++ b/src/hb-ot-shape-complex-hangul.cc
@@ -372,7 +372,7 @@ preprocess_text_hangul (const hb_ot_shape_plan_t *plan,
 	    buffer->merge_out_clusters (start, end);
 	  continue;
 	}
-	else if (!tindex)
+	else if ((!tindex && buffer->idx + 1 < count && isT (buffer->cur(+1).codepoint)))
 	  buffer->unsafe_to_break (buffer->idx, buffer->idx + 2); /* Mark unsafe between LV and T. */
       }