Type check failed in push to Buf; expected uint8 but got Str

[Altai-man]

🥞🥞🥞 Testing Proc::Feed for flappiness
uh oh in processing
A react block:
  in sub get-output at /opt/rakudo-pkg/share/perl6/site/sources/8D426DC1353D6AF5B11D2D745688C392EA1A5CF3 (Whateverable::Output) line 51
  in sub run-it at /mnt/Blin/lib/Blin/Processing.pm6 (Blin::Processing) line 385
  in sub test-module at /mnt/Blin/lib/Blin/Processing.pm6 (Blin::Processing) line 403
  in sub process-module at /mnt/Blin/lib/Blin/Processing.pm6 (Blin::Processing) line 433
  in block  at bin/blin.p6 line 337

Died because of the exception:
    Type check failed in push to Buf; expected uint8 but got Str ("«SIGKILL after anoth...)
      in block  at /opt/rakudo-pkg/share/perl6/site/sources/8D426DC1353D6AF5B11D2D745688C392EA1A5CF3 (Whateverable::Output) line 60

🥞🥞🥞 Testing TimeUnit (new)

A fresh thing from today's Blin run, couldn't find a similar ticket.

[AlexDaniel]

Thanks!