# New Ticket Created by Marcus Ramberg # Please include the string: [perl #127960] # in the subject line of all future correspondence about this issue. # <URL: https://rt.perl.org/Ticket/Display.html?id=127960 >
>From #perl6 marcusramberg <http://dogfood.convos.by/freenode/marcusramberg> Listening to Damian talk about concurrency in Oslo, and I tried one of his examples, but it seems to crash perl6 when you try to run it for some iterations - https://gist.github.com/marcusramberg/f789306f4f580c6cf1270ca12a333391 <https://gist.github.com/marcusramberg/f789306f4f580c6cf1270ca12a333391> gives me [1] 33874 abort perl6 channel.p6 17:11 bartolin <http://dogfood.convos.by/freenode/bartolin> timotimo: how did you force-reset it? from the command line? 17:11 RabidGravy <http://dogfood.convos.by/freenode/RabidGravy> marcusramberg, so it does 17:11 timotimo <http://dogfood.convos.by/freenode/timotimo> i use virt-manager, because i have no clue about the commandline 17:12 but i'm using it via x11 forwarding because i didn't yet put my ssh key of my laptop on there yet 17:12 lizmat <http://dogfood.convos.by/freenode/lizmat> marcusramberg: crash confirmed :-( 17:12 ajoe <http://dogfood.convos.by/freenode/ajoe> joined #perl6. 17:12 marcusramberg <http://dogfood.convos.by/freenode/marcusramberg> :-/ 17:13 bartolin <http://dogfood.convos.by/freenode/bartolin> but you have a root login for the hypervisor? could you try "virsh list" there? 17:13 lizmat <http://dogfood.convos.by/freenode/lizmat> marcusramberg: the good news is that it fails consistently after a fixed number of iterations 17: 17:13 RabidGravy <http://dogfood.convos.by/freenode/RabidGravy> lizmat, marcusramberg it appears to be associated with garbage collection looking at the backtrace 17 17:13 lizmat <http://dogfood.convos.by/freenode/lizmat> marcusramberg: and that number actually differs with different settings of MVM_SPESH_DISABLE and --optimize
