Revision 8066 removed parsing of value:

$ svn di -c 8066 trapper.c | tail -12

@@ -693,10 +615,6 @@
zbx_strlcpy(av.key, pl, sizeof(av.key));
*pr = ':';

• av.value = pr + 1;
• av.lastlogsize = 0;
• av.timestamp = 0;
• av.source = NULL;
  av.severity = 0;
  }

The value field remains NULL and the server crashes when it tries to dereference it.