t/csv.t fails on rakudo-jvm

[coke]

Originally found in

https://github.com/coke/rakudo-star-daily/blob/master/log/jvm-test-modules.log

Testing modules/Grammar-Profiler-Simple with /home/coke/sandbox/rakudo-star-daily/star-jvm/rakudo-star-daily/install/bin/perl6-j...
java.lang.StringIndexOutOfBoundsException: String index out of range: -3
  in regex value at t/csv.t:9
  in block  at /home/coke/sandbox/rakudo-star-daily/star-jvm/rakudo-star-daily/install/languages/perl6/lib/Grammar/Profiler/Simple.pm:17
  in regex line at t/csv.t:8
  in block  at /home/coke/sandbox/rakudo-star-daily/star-jvm/rakudo-star-daily/install/languages/perl6/lib/Grammar/Profiler/Simple.pm:17
  in regex TOP at t/csv.t:7
  in block  at /home/coke/sandbox/rakudo-star-daily/star-jvm/rakudo-star-daily/install/languages/perl6/lib/Grammar/Profiler/Simple.pm:17
  in method parse at gen/jvm/CORE.setting:13171
  in block  at t/csv.t:23

t/csv.t .. 
Dubious, test returned 1 (wstat 256, 0x100)
Failed 12/15 subtests 

Test Summary Report
-------------------
t/csv.t (Wstat: 256 Tests: 3 Failed: 0)
  Non-zero exit status: 1
  Parse errors: Bad plan.  You planned 15 tests but ran 3.
Files=1, Tests=3, 17 wallclock secs ( 0.02 usr  0.01 sys + 25.74 cusr  0.80 csys = 26.57 CPU)
Result: FAIL