crash after playback ends

[jurafxp]

Hello,
when the playback ends, librespot always crashes with following message:

 thread 'main' panicked at 'Box<Any>', core/src/session.rs:79:42
 stack backtrace:
    0:     0x5649b9f3422f - std::sys::imp::backtrace::tracing::imp::unwind_backtrace::h124b4bcef8>
    1:     0x5649b9f1a0f1 - std::sys_common::backtrace::print::hc582a11b3ee21b31
    2:     0x5649b9f2562d - std::panicking::default_hook::{{closure}}::h8186675e6f93fe64
    3:     0x5649b9f252df - std::panicking::default_hook::hd0d178fcebd87257
    4:     0x5649b9f25b1d - std::panicking::rust_panic_with_hook::h3ecd70e9e7b4a365
    5:     0x5649b9c7649a - std::panicking::begin_panic_new::hb538b624dc78c62a
    6:     0x5649b9cb5857 - <futures::future::map_err::MapErr<A, F> as futures::future::Future>::>
    7:     0x5649b9ef903c - tokio_core::reactor::Core::poll::h26ce83ebe657b45c
    8:     0x5649b9b8ffa4 - librespot::main::h9e79c76471055a88
    9:     0x5649b9f3c6e7 - __rust_maybe_catch_panic
   10:     0x5649b9f257c7 - std::panicking::try::h36ff7733b5113eb6
   11:     0x5649b9f36269 - std::rt::lang_start::h60bbe14d465df98b
   12:     0x7f2b65551f69 - __libc_start_main
   13:     0x5649b9b72299 - _start
   14:                0x0 - <unknown>

I have tried to build the latest master with same results.
Parameters for build:

 cargo build --release --no-default-features --features alsa-backend

[sashahilton00]

Difficult to say what this is exactly, though I expect it's to do with #134 seeing as it looks like all the other errors related to reconnection. Will leave this open for now.