Build tests failing

[sumanstats]

Hi there,

I am trying to install Log::Async in this docker image.
This image builds the latest rakudo from github.

However tests are failing.

This is the error I am getting:

===> Testing: Log::Async:ver('0.0.4')
t/01-basic.t ............... ok
t/02-levels.t .............. ok
t/03-log.t ................. ok
t/04-filter.t .............. ok
t/05-concurrent.t .......... ok
t/06-sleep.t ............... ok
t/07-done.t ................ ok
t/08-commandline.t ......... ok
t/08-use.t ................. ok
t/09-commandline-filter.t .. ok
t/10-formatter.t ...........
Dubious, test returned 1 (wstat 256, 0x100)
Failed 1/5 subtests
t/11-log-async-context.t ... ok
t/12-context.t ............. ok
t/13-remove-tap.t .......... ok
t/14-frame.t ............... ok
t/15-untapped.t ............ ok
t/99-meta.t ................ ok

Test Summary Report
-------------------
t/10-formatter.t         (Wstat: 256 Tests: 5 Failed: 1)
  Failed test:  4
  Non-zero exit status: 1
Files=17, Tests=77, 25 wallclock secs ( 0.09 usr  0.02 sys + 14.83 cusr  1.69 csys = 16.63 CPU)
Result: FAIL

# Failed test 'custom format again'
# at t/10-formatter.t line 62
# expected: $["trace: tracing paper", "debug: this is not a bug", "warning: this is your final warning"]
#      got: $["trace: tracing paper"]
# Looks like you failed 1 test of 5

===> Testing [FAIL]: Log::Async:ver('0.0.4')

What could be going wrong?
Till Sep 6 2017, the tests were passing. I think the problem could be in rakudo itself.

This is what experts from rakudo have to say:

Best,
Suman

[bduggan]

Thanks, yes, I've been looking into this but haven't yet figured it out: #18