[perl #129120] [CONC] in await: Cannot invoke this object (REPR: Null; VMNull)

Zoffix Znet via RT Wed, 31 Aug 2016 05:46:42 -0700

Attached 'backtrace-original.txt' is the output from the added CATCH and 
--ll-exception.


I was able to golf it down to this:

  await do for 3¹²³⁴⁵ … 3¹²³⁴⁵+127 -> $num {
      start $num.is-prime ?? "$num is prime" !! "$num is not prime";;
  }
  CATCH { .backtrace.full.say }

And that backtrace is also attached (backtrace-golfed.txt).

I tried replacing .is-prime with a bcrypt hashing, but was unable to produce 
the crash in about 8 runs:

  use Crypt::Bcrypt;
  await do for 3¹²³⁴⁵ … 3¹²³⁴⁵+127 -> $num {
      start bcrypt-hash ~$num, :15rounds;
  }
  CATCH { .backtrace.full.say }

So then I went back to my golfed version and removed the ternary operator... 
Couldn't reproduce anything in about 10 runs. Added a ternary as `?? 1 !! 2`, 
still couldn't reproduce anything, Changed the ternary to this:

  await do for 3¹²³⁴⁵ … 3¹²³⁴⁵+127 -> $num {
      start $num.is-prime ?? "$num is this" !! "$num is that";
  }
  CATCH { .backtrace.full.say }

... and it crashed the first time I ran it (backtrace-changed-ternary.txt 
attached) and then 1 more time in the next out of 7 runs.

It may of course be just a coincidence, but these are my results

  in method throw at gen/moar/m-CORE.setting line 24125
  in method result at gen/moar/m-CORE.setting line 35512
  in sub await at gen/moar/m-CORE.setting line 37569
  in block  at gen/moar/m-CORE.setting line 37568
  in block  at gen/moar/m-CORE.setting line 4845
  in method sink-all at gen/moar/m-CORE.setting line 4831
  in method sink at gen/moar/m-CORE.setting line 14540
  in block <unit> at test.p6 line 1

Cannot invoke this object (REPR: Null; VMNull)
   at gen/moar/m-CORE.setting:24125  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:throw)
 from gen/moar/m-CORE.setting:35512  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:result)
 from gen/moar/m-CORE.setting:37569  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:await)
 from gen/moar/m-CORE.setting:37568  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/m-CORE.setting:4845  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/m-CORE.setting:4831  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:sink-all)
 from gen/moar/m-CORE.setting:14540  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:sink)
 from test.p6:1  (<ephemeral file>:<unit>)
 from test.p6:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1519  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1722  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1616  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:27  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1590  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/m-main.nqp:47  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/m-main.nqp:38  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<entry>)

cpan@perlbuild2:/tmp/tmp.AY07p77AqM$ RAKUDO_MAX_THREADS=40 perl6 --ll-exception 
test.p6 
  in method throw at gen/moar/m-CORE.setting line 24125
  in method result at gen/moar/m-CORE.setting line 35512
  in sub await at gen/moar/m-CORE.setting line 37569
  in block  at gen/moar/m-CORE.setting line 37568
  in block  at gen/moar/m-CORE.setting line 4845
  in method sink-all at gen/moar/m-CORE.setting line 4831
  in method sink at gen/moar/m-CORE.setting line 14540
  in block <unit> at test.p6 line 1

Cannot invoke this object (REPR: Null; VMNull)
   at gen/moar/m-CORE.setting:24125  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:throw)
 from gen/moar/m-CORE.setting:35512  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:result)
 from gen/moar/m-CORE.setting:37569  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:await)
 from gen/moar/m-CORE.setting:37561  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:await)
 from gen/moar/m-CORE.setting:37568  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/m-CORE.setting:4845  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/m-CORE.setting:4831  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:sink-all)
 from gen/moar/m-CORE.setting:14540  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:sink)
 from test.p6:1  (<ephemeral file>:<unit>)
 from test.p6:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1519  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1722  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1616  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:27  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1590  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/m-main.nqp:47  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/m-main.nqp:38  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<entry>)

cpan@perlbuild2:/tmp/tmp.AY07p77AqM$ RAKUDO_MAX_THREADS=40 perl6 --ll-exception 
test.p6 
Cannot invoke this object (REPR: Null; VMNull)
   at gen/moar/m-CORE.setting:24125  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:throw)
 from gen/moar/m-CORE.setting:35512  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:result)
 from gen/moar/m-CORE.setting:37569  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:await)
 from gen/moar/m-CORE.setting:37568  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:)
 from gen/moar/m-CORE.setting:4800  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:push-all)
 from gen/moar/m-CORE.setting:2681  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:push-until-lazy)
 from gen/moar/m-CORE.setting:16050  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:reify-until-lazy)
 from gen/moar/m-CORE.setting:17095  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:join)
 from gen/moar/m-CORE.setting:16314  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:Str)
 from gen/moar/m-CORE.setting:1345  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:Str)
 from gen/moar/m-CORE.setting:14512  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:Str)
 from gen/moar/m-CORE.setting:1345  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:Str)
 from gen/moar/m-CORE.setting:29905  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:print)
 from gen/moar/m-CORE.setting:29901  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm:print)
 from test.p6:9  (<ephemeral file>:<unit>)
 from test.p6:1  (<ephemeral file>:<unit-outer>)
 from gen/moar/stage2/NQPHLL.nqp:1519  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:eval)
 from gen/moar/stage2/NQPHLL.nqp:1722  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:evalfiles)
 from gen/moar/stage2/NQPHLL.nqp:1616  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_eval)
 from src/Perl6/Compiler.nqp:27  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/Perl6/Compiler.moarvm:command_eval)
 from gen/moar/stage2/NQPHLL.nqp:1590  
(/home/cpan/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm:command_line)
 from gen/moar/m-main.nqp:47  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:MAIN)
 from gen/moar/m-main.nqp:38  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<mainline>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<main>)
 from <unknown>:1  
(/home/cpan/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm:<entry>)

[perl #129120] [CONC] in await: Cannot invoke this object (REPR: Null; VMNull)

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