From c8c6763988ebc4ce1c93c099ae2401b677035c60 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Thu, 30 Mar 2017 21:07:17 +0200
Subject: [PATCH] * src/cff/cffparse.h (CFF2_DEFAULT_STACK): Set to 513 also.

Requested by Dave Arnold.
---
 ChangeLog          |  6 ++++++
 src/cff/cffparse.h | 10 +++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index c7413718e..df655affb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2017-03-30  Werner Lemberg  <wl@gnu.org>
+
+	* src/cff/cffparse.h (CFF2_DEFAULT_STACK): Set to 513 also.
+
+	Requested by Dave Arnold.
+
 2017-03-30  Werner Lemberg  <wl@gnu.org>
 
 	[truetype] Fix HVAR and VVAR handling (#50678).
diff --git a/src/cff/cffparse.h b/src/cff/cffparse.h
index 9976d42b1..83d1bba45 100644
--- a/src/cff/cffparse.h
+++ b/src/cff/cffparse.h
@@ -31,8 +31,16 @@ FT_BEGIN_HEADER
   /* CFF uses constant parser stack size; */
   /* CFF2 can increase from default 193   */
 #define CFF_MAX_STACK_DEPTH  96
+
+  /*
+   *  There are plans to remove the `maxstack' operator in a forthcoming
+   *  revision of the CFF2 specification, increasing the (then static) stack
+   *  size to 513.  By making the default stack size equal to the maximum
+   *  stack size, the operator is essentially disabled, which has the
+   *  desired effect in FreeType.
+   */
 #define CFF2_MAX_STACK      513
-#define CFF2_DEFAULT_STACK  193
+#define CFF2_DEFAULT_STACK  513
 
 #define CFF_CODE_TOPDICT    0x1000
 #define CFF_CODE_PRIVATE    0x2000