X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fbackends%2Falsa%2Falsa_midi.cc;h=43c11c32651c9662051f5d0e59a68214a8051f87;hb=dac57703ccd7205ac94c14b407b802a69f4187f1;hp=dce84785b3c3c21a4c841723d0ab4066cbc4dbe4;hpb=e5e12acc5698090f2c0c614385e457cc0b46fbb0;p=ardour.git

diff --git a/libs/backends/alsa/alsa_midi.cc b/libs/backends/alsa/alsa_midi.cc
index dce84785b3..43c11c3265 100644
--- a/libs/backends/alsa/alsa_midi.cc
+++ b/libs/backends/alsa/alsa_midi.cc
@@ -186,6 +186,7 @@ AlsaMidiIn::recv_event (pframes_t &time, uint8_t *data, size_t &size)
 		if (vector.len[0] > 0) {
 			memcpy ((uint8_t*)&h, vector.buf[0], vector.len[0]);
 		}
+		assert(vector.buf[1] || vector.len[0] == sizeof(MidiEventHeader));
 		memcpy (((uint8_t*)&h) + vector.len[0], vector.buf[1], sizeof(MidiEventHeader) - vector.len[0]);
 	}