Re: Starting playback in the middle of a movement

[Andreas Schneider]

On 2019-12-16 10:23, Richard Shann wrote:
> On Sat, 2019-12-14 at 20:14 +0100, Andreas Schneider wrote:
>> [...]
> > Can you see therein what the problem may be?
>
> No, this Ctrl-C has just interrupted some uninteresting part of the
> loop - did you try it a few times to see if you could catch it doing
> something else? If so I'll look into the code to find a few places to
> try breaking in and finding whereabouts the long pause comes.

I have tried it a few times, but haven't seen anything interesting.

Example:

#0  0x00007ffff5392819 in __GI___poll (fds=0x5555571b5470, nfds=3,
timeout=9)
    at ../sysdeps/unix/sysv/linux/poll.c:29
#1  0x00007ffff6269136 in  () at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007ffff62694c2 in g_main_loop_run ()
    at /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007ffff6a60b15 in gtk_main ()
    at /usr/lib/x86_64-linux-gnu/libgtk-3.so.0
#4  0x00005555555ea26f in  ()
#5  0x00007ffff7e24753 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#6  0x00007ffff7ed4250 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#7  0x00007ffff7ea616e in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#8  0x00007ffff7ede563 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#9  0x00007ffff7efd896 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#10 0x00007ffff7e2f1ab in scm_call_4 ()
    at /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#11 0x00007ffff7ed40a6 in scm_catch_with_pre_unwind_handler ()
    at /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#12 0x00007ffff7ed4328 in scm_c_catch ()
    at /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#13 0x00007ffff7e245a2 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#14 0x00007ffff7e2486b in scm_c_with_continuation_barrier ()
    at /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#15 0x00007ffff7ed101c in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
--Type <RET> for more, q to quit, c to continue without paging--
#16 0x00007ffff7d53ef5 in GC_call_with_stack_base ()
    at /usr/lib/x86_64-linux-gnu/libgc.so.1
#17 0x00007ffff7ed1105 in  () at
/usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#18 0x00007ffff7ed1145 in scm_with_guile ()
    at /usr/lib/x86_64-linux-gnu/libguile-2.0.so.22
#19 0x000055555557bd5a in main ()

As it's random when Ctrl-C is pressed, it is maybe easier to build on
what we know. For instance, it is striking that the output always states
that playback starts at 0.0. Can you recommend a place to set a
breakpoint to debug that further?

Andreas