From 25a09eb9bf2d993228a3d98d1dd271f55efb2358 Mon Sep 17 00:00:00 2001
From: Behdad Esfahbod <behdad@behdad.org>
Date: Thu, 8 Jan 2009 03:04:34 -0500
Subject: [PATCH] Don't use FcCharSetCopy in FcCharSetMerge

The Copy function is actually a ref, not real copy.
---
 doc/fccharset.fncs | 2 +-
 src/fccharset.c    | 7 ++++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/doc/fccharset.fncs b/doc/fccharset.fncs
index 93e1f5c..0dd7d1a 100644
--- a/doc/fccharset.fncs
+++ b/doc/fccharset.fncs
@@ -104,7 +104,7 @@ Returns a set including only those chars found in <parameter>a</parameter> but n
 @TYPE2@		const FcCharSet *	@ARG2@		b
 @PURPOSE@	Merge charsets
 @DESC@
-If <parameter>a</parameter> is NULL, returns a copy of <parameter>b</parameter>.
+If <parameter>a</parameter> is NULL, returns a newly-created copy of <parameter>b</parameter>.
 If <parameter>a</parameter> is an FcCharSet object owned by fontconfig that
 cannot be modified, it returns the union of <parameter>a</parameter> and
 <parameter>b</parameter> in a newly-created FcCharSet object.
diff --git a/src/fccharset.c b/src/fccharset.c
index 1891f08..2daa39d 100644
--- a/src/fccharset.c
+++ b/src/fccharset.c
@@ -459,14 +459,15 @@ FcCharSetMerge (FcCharSet *a, const FcCharSet *b)
     FcCharSetIter    ai, bi;
 
     if (a == NULL) {
-	return FcCharSetCopy ((FcCharSet *) b);
+	fcs = a = FcCharSetCreate ();
     } else if (a->ref == FC_REF_CONSTANT) {
 	fcs = FcCharSetCreate ();
-	if (fcs == NULL)
-	    return NULL;
     } else
 	fcs = a;
 
+    if (fcs == NULL)
+	return NULL;
+
     FcCharSetIterStart (a, &ai);
     FcCharSetIterStart (b, &bi);
     while (ai.leaf || bi.leaf)
-- 
2.39.2