Libspotify crashes on logout. Possible thread leakage?

I have been communicating with libspotify for a long time, but every time I get a segmentation error when I call the API sp_session_logout()

.

I made a test that does the following loop:

• Create session
• To come in
• Output
• Release the session

It usually crashes after 3-4 iterations.

The code and stdout can be found here: https://gist.github.com/jonas-lundqvist/4bb759a1f1ed09de46a1

Compiled with

gcc -std=gnu99 -g -Wall `pkg-config --cflags libspotify` -o test_login_logout login_logout.c appkey.c cred.c -lpthread `pkg-config --libs libspotify`

      

        
        
        
      

    

I noticed, however, that two threads were created at the start of each iteration, but only one of them exited.

This is the output from gdb

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7ffff7fbf700 (LWP 31308)]
[New Thread 0x7ffff7f3e700 (LWP 31309)]
[Thread 0x7ffff7f3e700 (LWP 31309) exited]
[New Thread 0x7ffff7f3e700 (LWP 31310)]
[New Thread 0x7ffff7ebd700 (LWP 31311)]
[Thread 0x7ffff7ebd700 (LWP 31311) exited]
[New Thread 0x7ffff7ebd700 (LWP 31313)]
[New Thread 0x7ffff6638700 (LWP 31314)]
[Thread 0x7ffff6638700 (LWP 31314) exited]
[New Thread 0x7ffff6638700 (LWP 31315)]
[New Thread 0x7ffff65b7700 (LWP 31316)]

Program received signal SIGSEGV, Segmentation fault.

      

        
        
        
      

    

Checking the streams I see:

Id   Target Id         Frame
9    Thread 0x7ffff65b7700 (LWP 31316) "Network Thread" 0x00007ffff744b50d in poll () at ../sysdeps/unix/syscall-template.S:81
8    Thread 0x7ffff6638700 (LWP 31315) "Dns Thread" 0x00007ffff744b50d in poll () at ../sysdeps/unix/syscall-template.S:81
6    Thread 0x7ffff7ebd700 (LWP 31313) "Dns Thread" sem_wait ()
at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
4    Thread 0x7ffff7f3e700 (LWP 31310) "Dns Thread" sem_wait ()
at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
2    Thread 0x7ffff7fbf700 (LWP 31308) "Dns Thread" sem_wait ()
at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
* 1    Thread 0x7ffff7fc1700 (LWP 31304) "test_login_logo" 0x00007ffff77eb5ac in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12

      

        
        
        
      

    

And if I select the threds created in one of the iterations, I see this:

[Switching to thread 4 (Thread 0x7ffff7f3e700 (LWP 31310))]
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
85  ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S: No such file or directory.
#0  sem_wait () at ../nptl/sysdeps/unix/sysv/linux/x86_64/sem_wait.S:85
#1  0x00007ffff780c1f8 in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#2  0x00007ffff77c608d in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#3  0x00007ffff7bc70a4 in start_thread (arg=0x7ffff7f3e700) at pthread_create.c:309
#4  0x00007ffff745404d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:111

      

        
        
        
      

    

Unfortunatley. The development of libspotify seems to be completely dead, but does anyone know if there is a work around?

I need to do multiple sp_session_create()

/ sp_session_release()

in my application ...

Edit: bt of the faulty thread (from a different but similar run)

#0  0x00007ffff77eb5ac in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#1  0x00007ffff7860b5a in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#2  0x00007ffff781683f in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#3  0x00007ffff7817141 in ?? () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#4  0x00007ffff78add7d in sp_session_logout () from /home/jonas/lib/libspotify/lib/libspotify.so.12
#5  0x0000000000400d51 in main (argc=1, argv=0x7fffffffe3a8) at login_logout.c:99