From @usev6

There are different issues with Rakudo on JVM after the merge of
'relocateable-precomp'. I compared an installation on the merge
commit e8fd55bbe6 with a second installation on that commit
plus 'git revert -m 1 e8fd55bbe6'.

* a lot of new failing tests in S10-packages/precompilation.rakudo.jvm
  (some others where fudged before)​: 2-4, 7-21, 24-26, 28-30, 32, 38, 39

* test for RT #​114354 fails (S06-other/main.t aborts), because 'sub MAIN'
  in t/spec/packages/HasMain.pm (line 5) is called with @​*ARGS containing
  five elements

* running stresstest takes about 10 hours after merge of branch
  'relocateable-precomp' (used to be substantially faster --
  maybe 3 hours -- didn't time this)

* 'make install' fails with​:

./perl6-j tools/build/install-core-dist.pl /home/christian/bin/rakudo.jvm/share/perl6
===SORRY!===
Cannot call method 'prefix' on a null object

  in block <unit> at tools/build/install-core-dist.pl line 15

*** Error code 1

Stop

From @usev6

Running the following code with RAKUDO_MODULE_DEBUG=1 revealed that rakudo-j did precompile a module, but was unable to use it afterwards -- and therefore removed it​:

$ echo '#' > Foo.pm6
$ RAKUDO_MODULE_DEBUG=1 ./perl6-j -I. -e 'use Foo'

Since that happened with Test.pm as well, the long spectest runs make sense.

I tried to debug this problem and it looks like FIRST not working on rakudo-j is the culprint​:

==== start of discussion on IRC -- cmp. http://irclog.perlgeek.de/p6dev/2016-05-08#i_12451277
bartolin nine_, psch​: I think I found the cause for one of the precomp issues on rakudo-j​: the FIRST phaser in https://github.com/rakudo/rakudo/blob/nom/src/core/CompUnit/PrecompilationRepository.pm#L87 does not work for rakudo-j. because of that rakudo-j did not load a freshly precompiled Module.
bartolin m​: for 1 { FIRST { next }; say "should not be here" } # prints "should not be here" on rakudo-j
camelia rakudo-moar 283b85​: ( no output )
timotimo damn
bartolin I guess, that's behind my stresstest runs taking 10 hours :-/
timotimo ;(
bartolin he, I already put it in RT last november​: RT #​126701 :-)
synopsebot6 Link​: https://rt-archive.perl.org/perl6//Public/Bug/Display.html?id=126701
==== end of discussion on IRC -- powered by https://github.com/usev6/dump-irc-logs

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

From @usev6

As a status update​: things are substantially better now (2016.04-218-gaa2715d) -- thanks to nine++
and psch++

+ stresstest runs in a reasonable time again (precompiled Test.pm can be used)

+ test for RT #​114354 passes again

+ FIRST works now

The remaining issues are​:

- 'make install' still fails -- though with a different error​:

./perl6-j tools/build/install-core-dist.pl /home/christian/bin/rakudo.jvm/share/perl6
===SORRY!===
setcodeobj can only be used with a CodeRef

  in block <unit> at tools/build/install-core-dist.pl line 18

- still failing tests in S10-packages/precompilation.t -- there are some
  NullPointerExceptions and therefore only 28 instead of 40 tests are run

From @usev6

The remaining issues are resolved now. Therefore, I'm closing this ticket.

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