#0  0xf5a547f8 in _xend () at pthread_rwlock_unlock.c:38
No locals.
#1  __GI___pthread_rwlock_unlock (rwlock=0x5981b630) at pthread_rwlock_unlock.c:38
        ret = 0
        futex_shared = 0
#2  0xf6901255 in g_rw_lock_reader_unlock () from /lib/i386-linux-gnu/libglib-2.0.so.0
No symbol table info available.
#3  0xf6a3f9f8 in Glib::Threads::RWLock::writer_unlock() () from /usr/lib/i386-linux-gnu/libglibmm-2.4.so.1
No symbol table info available.
#4  0xf7162fd4 in ARDOUR::Playlist::RegionWriteLock::~RegionWriteLock() () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#5  0xf71da500 in ARDOUR::Playlist::add_region(boost::shared_ptr<ARDOUR::Region>, long long, float, bool, int) () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#6  0xf6e70bc1 in ARDOUR::AudioDiskstream::transport_stopped_wallclock(tm&, long, bool) () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#7  0xf738cf16 in ARDOUR::Session::non_realtime_stop(bool, int, bool&) () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#8  0xf738e3d5 in ARDOUR::Session::butler_transport_work() () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#9  0xf6f16158 in ARDOUR::Butler::thread_work() () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#10 0xf6f16c83 in ARDOUR::Butler::_thread_work(void*) () from /usr/lib/ardour5/libardour.so.3
No symbol table info available.
#11 0xf6b4ef42 in ?? () from /usr/lib/ardour5/libpbd.so.4
No symbol table info available.
#12 0xf5a4f305 in start_thread (arg=0xe95e8c40) at pthread_create.c:333
        __res = <optimized out>
        pd = 0xe95e8c40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-173658112, 0, 4001536, -379682008, -466295666, 282432183}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#13 0xf54375fe in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:113
No locals.