From @labster

labster​: r​: sub foo ($bar :D) { 1; }
[8​:51pm] p6eval​: rakudo 897636​: OUTPUT«===SORRY!===␤invoke() not
implemented in class 'QAST​::Op'␤»
[8​:54pm] labster​: I guess I want Mu​:D there. But definitely LTA error
message.
[8​:55pm] sorear​: rakudobug. internal error.
[8​:57pm] labster​: r​: sub x ($y :qwerty) { 3; }
[8​:57pm] p6eval​: rakudo 897636​: OUTPUT«===SORRY!===␤invoke() not
implemented in class 'QAST​::Op'␤»
[8​:58pm] labster​: r​: sub x ($y qwerty) { 3; }
[8​:58pm] p6eval​: rakudo 897636​: OUTPUT«[31m===[0mSORRY![31m===[0m␤Missing
block␤at /tmp/gHtxH4GsMT​:1␤------> [32msub x ($y [33m⏏[31mqwerty) { 3;
}[0m␤ expecting any of​:␤ statement list␤ prefix or
term␤ prefix or meta-prefix␤ new name to be defined␤
formal pa…
[8​:58pm] labster​: looks like the colon triggers it.

From @usev6

Current failure mode (branch 'glr', perl6 version 2015.07.1-682-g57b7ebc built on MoarVM version 2015.07-108-g7e9f29e)​:

$ perl6-m -e 'sub foo ($bar :D) { 1; }'
===SORRY!===
Cannot invoke this object (REPR​: P6opaque, cs = 0)

$ perl6-m --ll-exception -e 'sub foo ($bar :D) { 1; }'
Cannot invoke this object (REPR​: P6opaque, cs = 0)
  at src/Perl6/World.nqp​:1640 (./blib/Perl6/World.moarvm​:create_signature_and_params​:551)
from src/Perl6/Grammar.nqp​:2489 (./blib/Perl6/Grammar.moarvm​:routine_def​:946)
from <unknown>​:1 (./blib/Perl6/Grammar.moarvm​:routine_declarator​:sym<sub>​:147)
from gen/moar/stage2/QRegex.nqp​:1350 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/QRegex.moarvm​:!protoregex​:109)
from <unknown>​:1 (./blib/Perl6/Grammar.moarvm​:routine_declarator​:10)
from <unknown>​:1 (./blib/Perl6/Grammar.moarvm​:term​:sym<routine_declarator>​:57)
from gen/moar/stage2/QRegex.nqp​:1350 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/QRegex.moarvm​:!protoregex​:109)
from <unknown>​:1 (./blib/Perl6/Grammar.moarvm​:term​:10)
from src/Perl6/Grammar.nqp​:3615 (./blib/Perl6/Grammar.moarvm​:termish​:403)
from gen/moar/stage2/NQPHLL.nqp​:678 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:EXPR​:74)
from src/Perl6/Grammar.nqp​:3649 (./blib/Perl6/Grammar.moarvm​:EXPR​:24)
from src/Perl6/Grammar.nqp​:1191 (./blib/Perl6/Grammar.moarvm​:statement​:395)
from src/Perl6/Grammar.nqp​:1126 (./blib/Perl6/Grammar.moarvm​:statementlist​:280)
from gen/moar/stage2/NQPHLL.nqp​:895 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:LANG​:146)
from src/Perl6/Grammar.nqp​:1516 (./blib/Perl6/Grammar.moarvm​:FOREIGN_LANG​:67)
from src/Perl6/Grammar.nqp​:1103 (./blib/Perl6/Grammar.moarvm​:comp_unit​:1025)
from src/Perl6/Grammar.nqp​:402 (./blib/Perl6/Grammar.moarvm​:TOP​:528)
from gen/moar/stage2/QRegex.nqp​:1997 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/QRegex.moarvm​:parse​:44)
from gen/moar/stage2/NQPHLL.nqp​:1580 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:parse​:80)
from gen/moar/stage2/NQPHLL.nqp​:1536 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:compile​:202)
from gen/moar/stage2/NQPHLL.nqp​:1272 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:eval​:62)
from gen/moar/stage2/NQPHLL.nqp​:1379 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​::35)
from gen/moar/stage2/NQPHLL.nqp​:1376 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:command_eval​:155)
from src/Perl6/Compiler.nqp​:59 (./blib/Perl6/Compiler.moarvm​:command_eval​:93)
from gen/moar/stage2/NQPHLL.nqp​:1360 (/home/christian/bin/rakudo.moar-glr/share/nqp/lib/NQPHLL.moarvm​:command_line​:114)
from src/gen/m-main.nqp​:39 (/usr/home/christian/perl6/perl6-roast-data/rakudo.moar-glr/perl6.moarvm​:MAIN​:18)
from src/gen/m-main.nqp​:35 (/usr/home/christian/perl6/perl6-roast-data/rakudo.moar-glr/perl6.moarvm​:<mainline>​:197)
from <unknown>​:1 (/usr/home/christian/perl6/perl6-roast-data/rakudo.moar-glr/perl6.moarvm​:<main>​:8)
from <unknown>​:1 (/usr/home/christian/perl6/perl6-roast-data/rakudo.moar-glr/perl6.moarvm​:<entry>​:9)

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

From @jnthn

On Tue Sep 01 13​:21​:08 2015, bartolin@​gmx.de wrote​:

Current failure mode (branch 'glr', perl6 version 2015.07.1-682-
g57b7ebc built on MoarVM version 2015.07-108-g7e9f29e)​:

$ perl6-m -e 'sub foo ($bar :D) { 1; }'
===SORRY!===
Cannot invoke this object (REPR​: P6opaque, cs = 0)

Now gives a better error​:

===SORRY!=== Error while compiling -e
Invalid typename 'D' in parameter declaration.
at -e​:1
------> sub foo ($bar :D<HERE>) { 1; }

It considers it (correctly enough) as a type name because it's after the invocant separator :. Test added to S32-exceptions/misc.t.

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