From @moritz

11​:57 < sundar> It seems quit is recognized as something special, given it
  didn't say "Could not find sub &quit" like it does for
other
  random words...
11​:59 < sundar> anything that starts with 'q' makes it confused instead of
  getting treated as a sub call...
12​:00 <@​moritz_> ah
12​:00 <@​moritz_> quote parsing fail
12​:00 <@​moritz_> rakudo​: qfoo
12​:00 <+p6eval> rakudo c99eeb​: OUTPUT«Confused at line 11, near
"qfoo"␤current
  instr.​: 'perl6;HLL;Grammar;panic' pc 500
  (ext/nqp-rx/src/stage0/HLL-s0.pir​:328)␤»
12​:00 <@​moritz_> rakudo​: afoo
12​:00 <+p6eval> rakudo c99eeb​: OUTPUT«Could not find sub &afoo␤current
instr.​:
  '_block14' pc 29 (EVAL_1​:0)␤»
12​:00 <@​moritz_> that's a bug
12​:00 * moritz_ submits
12​:00 <@​moritz_> hm
12​:00 <@​moritz_> std​: qfoo
12​:00 <+p6eval> std 30362​: OUTPUT«===SORRY!===␤Undeclared routine​:␤
'qfoo'
  used at line 1␤Check failed␤FAILED 00​:01 108m␤»

From @masak

<masak> std​: subset Quad of Any; sub classify($_) { when Quad {}; when Quad {} }
<p6eval> std 30383​: OUTPUT«ok 00​:01 110m␤»
<masak> rakudo​: subset Quad of Any; sub classify($_) { when Quad {};
when Quad {} }; say 'alive'
<p6eval> rakudo cb4521​: OUTPUT«Unable to parse blockoid, couldn't find
final '}' [...]
<masak> rakudo​: subset B of Any; sub classify($_) { when B {}; when B
{} }; say 'alive'
<p6eval> rakudo cb4521​: OUTPUT«alive␤»
* masak confused
* masak submits rakudobug

I, um... what?

From sundaryourfriend@gmail.com

On Tue Apr 13 06​:18​:16 2010, masak wrote​:

<masak> std​: subset Quad of Any; sub classify($_) { when Quad {}; when
Quad {} }
<p6eval> std 30383​: OUTPUT«ok 00​:01 110m␤»
<masak> rakudo​: subset Quad of Any; sub classify($_) { when Quad {};
when Quad {} }; say 'alive'
<p6eval> rakudo cb4521​: OUTPUT«Unable to parse blockoid, couldn't find
final '}' [...]
<masak> rakudo​: subset B of Any; sub classify($_) { when B {}; when B
{} }; say 'alive'
<p6eval> rakudo cb4521​: OUTPUT«alive␤»
* masak confused
* masak submits rakudobug

I, um... what?

This seems to happen with the usage of anything that starts with Q or q.
The declaration parses fine, it's when we try to use it that Rakudo gets
confused.

<sundar> rakudo​: class Mill {}; my $a = Mill.new();
<p6eval> rakudo 3b5a79​: ( no output )
<sundar> rakudo​: class Quill {}; my $a = Quill.new();
<p6eval> rakudo 3b5a79​: OUTPUT«Confused at line 11, near "my $a =
Qu"â�¤current instr.​: 'perl6;HLL;Grammar;panic' pc 500
(ext/nqp-rx/src/stage0/HLL-s0.pir​:328)â�¤Â»

<sundar> rakudo​: sub mill {say "OH HAI"}; mill;
<p6eval> rakudo 3b5a79​: OUTPUT«OH HAIâ�¤Â»
<sundar> rakudo​: sub quill {say "OH HAI"}; quill;
<p6eval> rakudo 3b5a79​: OUTPUT«Confused at line 11, near
"quill;"â�¤current instr.​: 'perl6;HLL;Grammar;panic' pc 500
(ext/nqp-rx/src/stage0/HLL-s0.pir​:328)â�¤Â»

Curiously, the sub works if we call it with parenthesis.

<sundar> rakudo​: sub quill {say "OH HAI"}; quill();
<p6eval> rakudo 3b5a79​: OUTPUT«OH HAIâ�¤Â»

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

From arnsholt@gmail.com

This is either an NQP bug, or an identical bug as one in NQP. I'm
looking into it. It looks like quote_EXPR somehow blocks Quad from
being parsed as an identifier.

From @pmichaud

Now fixed in cd2d123. Assigning to moritz for spectest verification.

Pm

From @kyleha

This is an automatically generated mail to inform you that tests are now available in t/spec/S02-names_and_variables/names.t

commit 6d7027ab9bb8b4a6c73582569e1d2732dbe4d723
Author​: moritz <moritz@​c213334d-75ef-0310-aa23-eaa082d1ae64>
Date​: Mon Jul 19 21​:10​:30 2010 +0000

  [t/spec] test for RT #​74276, names starting with Q
 
  git-svn-id​: http://svn.pugscode.org/pugs@&#8203;31770 c213334d-75ef-0310-aa23-eaa082d1ae64

diff --git a/t/spec/S02-names_and_variables/names.t b/t/spec/S02-names_and_variables/names.t
index 2b4bdac..b72580e 100644
--- a/t/spec/S02-names_and_variables/names.t
+++ b/t/spec/S02-names_and_variables/names.t
@@ -2,7 +2,7 @@ use v6;
 
 use Test;
 
-plan 22;
+plan 23;
 
 # I'm using semi-random nouns for variable names since I'm tired of foo/bar/baz and alpha/beta/...
 
@@ -77,4 +77,11 @@ plan 22;
         'error message mentions name not recognized, no maximum recursion depth exceeded';
 }
 
+# RT #74276
+# Rakudo had troubles with names starting with Q
+{
+    eval_lives_ok 'class Quox { }; Quox.new', 'class names can start with Q';
+
+}
+
 # vim: ft=perl6

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