[zeromq-dev] bstarcli, Bad file descriptor returned, getsockopt

[hhusp house]

Platform: CentOSzeromq-4.1.2czmq-3.0.2

I built the bstarsrv2 and bstarcli from the C examples zguide tree(git clone --depth=1 git://github.com/imatix/zguide.git)
When I look at trace a noticed the error returned by getsockopt:
getsockopt(2300165744, SOL_SOCKET, SO_TYPE, 0x7fff9f74b3bc, 0x7fff9f74b3b8) = -1 EBADF (Bad file descriptor)
sock_type is -1
Call stack:(gdb) bt#0  zsock_resolve (self=0x604da0) at src/zsock.c:1525#1  0x00007ffff7b3afad in zstr_recv (source=<value optimized out>) at src/zstr.c:63#2  0x0000000000400b3f in main () at bstarcli.c:44
 		 	   		  
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