From @usev6

Currently there is a weird error while running S32-str/comb.t on rakudo-j. For some reason the test file aborts after 39 tests with the message 'Type check failed in binding $pat; expected Regex but got Str ("o")'.

Test number 40 runs just fine standalone​:

$ perl6-j -Ilib -e 'use Test; is comb("o","ooo"), <o o o>'
ok 1 -

I tried to golf the problem down and that's what I arrived at​:

$ > Foo.pm6
$ ./perl6-j -I. -e 'use Foo; "f".comb; "o".comb("o")'
Type check failed in binding $pat; expected Regex but got Str ("o")
  in block <unit> at -e line 1

So the problem seems to be related to module loading and it happens during that second call of method comb.

From @lizmat

Have you tried with MVM_SPESH_DISABLE=1 and friends?

On 08 Jul 2016, at 22​:56, Christian Bartolomaeus (via RT) <perl6-bugs-followup@​perl.org> wrote​:

# New Ticket Created by Christian Bartolomaeus
# Please include the string​: [perl #​128580]
# in the subject line of all future correspondence about this issue.
# <URL​: https://rt-archive.perl.org/perl6/Ticket/Display.html?id=128580 >

Currently there is a weird error while running S32-str/comb.t on rakudo-j. For some reason the test file aborts after 39 tests with the message 'Type check failed in binding $pat; expected Regex but got Str ("o")'.

Test number 40 runs just fine standalone​:

$ perl6-j -Ilib -e 'use Test; is comb("o","ooo"), <o o o>'
ok 1 -

I tried to golf the problem down and that's what I arrived at​:

$ > Foo.pm6
$ ./perl6-j -I. -e 'use Foo; "f".comb; "o".comb("o")'
Type check failed in binding $pat; expected Regex but got Str ("o")
in block <unit> at -e line 1

So the problem seems to be related to module loading and it happens during that second call of method comb.

The RT System itself - Status changed from 'new' to 'open'

From @usev6

On Fri Jul 08 14​:57​:11 2016, elizabeth wrote​:

Have you tried with MVM_SPESH_DISABLE=1 and friends?

This only happens on JVM, so there aren't many of those friends, are there? :-)

At least I tried now with 'optimize=0' and got the same error. I also tried 'RAKUDO_MODULE_DEBUG=1' but didn't something strange there​:

$ RAKUDO_MODULE_DEBUG=1 ./perl6-j --optimize=foo -I. -e 'use Foo; "f".comb; "o".comb("o")'
  11900 RMD​: Loading settings CORE
  11900 RMD​: Setting up default paths​: . blib
  11900 RMD​: going to load Perl6​::BOOTSTRAP
  11900 RMD​: Settings CORE loaded
360 11900 RMD​: Attempting 'Foo' as a pragma
  88 11900 RMD​: 'Foo' is not a valid pragma
  33 11900 RMD​: Attempting to load 'Foo'
  11 11900 RMD​: Late loading 'Foo'
  20 11900 RMD​: Parsing specs​: .
  28 11900 RMD​: Parsing specs​:
  16 11900 RMD​: Parsing specs​: .
  13 11900 RMD​: Parsing specs​: blib
  21 11900 RMD​: Parsing specs​: /usr/home/christian/bin/rakudo.jvm/share/nqp/lib
478 11900 RMD​: try-load 7795C5BD3D21241ED31BB5DB19106B21CC622A86​: /usr/home/christian/perl6/perl6-roast-data/rakudo.jvm/Foo.pm6
  55 11900 RMD​: Trying to load 7795C5BD3D21241ED31BB5DB19106B21CC622A86 from /usr/home/christian/perl6/perl6-roast-data/rakudo.jvm/.precomp
  36 11900 RMD​: Trying to load 7795C5BD3D21241ED31BB5DB19106B21CC622A86.repo-id from /usr/home/christian/perl6/perl6-roast-data/rakudo.jvm/.precomp
  44 11900 RMD​: Loading precompiled
  /usr/home/christian/perl6/perl6-roast-data/rakudo.jvm/.precomp/FCFAAA33FDBB30941CBF3561334B7DCB959F5F4F.1.468023657397E9/77/7795C5BD3D21241ED31BB5DB19106B21CC622A86
187 11900 RMD​: Performing imports for 'Foo'
  12 11900 RMD​: Imports for 'Foo' done
Type check failed in binding $pat; expected Regex but got Str ("o")
  in block <unit> at -e line 1

From @usev6

There was indeed something wrong with the multi cache on the JVM backend. Fixed with Raku/nqp@7eaebf5abd

I'm closing this ticket as 'resolved'.

@usev6 - Status changed from 'open' to 'resolved'