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My tor client is running on version 0.2.8.0-alpha-dev (git-ee5337e90497e31c) and I got a crash with a coredump this morning. It happened when one of my hidden service was rebooted and then the torsocks client did try to reconnect.

Last notice log:

Dec 04 11:39:16.000 [notice] Closing stream for 'SCRUBBED ONION': hidden service is unavailable (try again later).

Here is the gdb backtrace of the coredump:

[snip]
#3  <signal handler called>
No locals.
#4  connection_ap_attach_pending (retry=retry@entry=1) at src/or/connection_edge.c:801
        conn = 0x0
        entry_conn_sl_idx = 3
        entry_conn_sl_len = 4
        entry_conn = 0x0
        __FUNCTION__ = "connection_ap_attach_pending"
        __func__ = "connection_ap_attach_pending"
#5  0x0000561584871bf4 in connection_ap_rescan_and_attach_pending () at src/or/connection_edge.c:779
        entry_conn = 0x561586bcc260
        conns = <optimized out>
        __FUNCTION__ = "connection_ap_rescan_and_attach_pending"
#6  0x0000561584851da8 in circuit_build_needed_circs (now=now@entry=1449247161) at src/or/circuituse.c:1126
        options = 0x561586bcc260
#7  0x00005615847c8288 in run_scheduled_events (now=1449247161) at src/or/main.c:1491
        options = 0x561586bcc260
        have_dir_info = <optimized out>
        i = <optimized out>
[snip]

Apparently conn is NULL at that point thus this line exploded insrc/or/connection_edge.c

    connection_t *conn = ENTRY_TO_CONN(entry_conn);
    if (conn->marked_for_close) {