From 95631cdc25b4643add09a45e55228375ef159e58 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sun, 8 Mar 2015 01:38:47 +0100
Subject: [PATCH] properly handle empty CFStringRefs.

---
 libs/backends/coreaudio/coremidi_io.cc | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libs/backends/coreaudio/coremidi_io.cc b/libs/backends/coreaudio/coremidi_io.cc
index c3bd868165..fd3b4c1db8 100644
--- a/libs/backends/coreaudio/coremidi_io.cc
+++ b/libs/backends/coreaudio/coremidi_io.cc
@@ -46,7 +46,11 @@ static void midiInputCallback(const MIDIPacketList *list, void *procRef, void *s
 static std::string getDisplayName(MIDIObjectRef object)
 {
 	CFStringRef name = nil;
-	if (noErr != MIDIObjectGetStringProperty(object, kMIDIPropertyDisplayName, &name) && name) {
+	if (noErr != MIDIObjectGetStringProperty(object, kMIDIPropertyDisplayName, &name)) {
+		return "";
+	}
+	if (!CFStringGetCStringPtr(name, kCFStringEncodingUTF8)) {
+		if (name) CFRelease(name);
 		return "";
 	}
 	std::string rv (CFStringGetCStringPtr(name, kCFStringEncodingUTF8));