[perl #75010] [BUG] @x and @.x in class methods treated differently

[via RT]

# New Ticket Created by  Richard Hainsworth 
# Please include the string:  [perl #75010]
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# <URL: http://rt.perl.org/rt3/Ticket/Display.html?id=75010 >


See IRC May 10
@.x[1 .. +...@x] is not being treated (rakudo dies) in the same way as @y[1 
.. +...@y]

In particular:

finanalyst: rakudo: class AB{has @.x; method aa { my @y=1,2,3; .say for 
@y[1 .. +...@y]; .say for @.x; .say for @.x[1 ..^ +...@.x] } };my AB $y 
.=new(:x(1,2,3)); $y.aa;
p6eval: rakudo 3d3893: OUTPUT«2␤3␤␤1␤2␤3␤No applicable candidates found 
to dispatch to for 'postcircumfix:<[ ]>'. Available candidates are:␤Mu : 
Int $i;; *%_)␤Mu : Block $b;; *%_)␤Mu : !whatever_dispatch_helper ;; 
*%_)␤␤current instr.: '!postcircumfix:<[ ]>' pc 11329 
(src/builtins/Role.pir:26)␤»


More detail:

finanalyst: rakudo: my @x=1,2,3,4; .say for @x[1 ..^ +...@x]
p6eval: rakudo 3d3893: OUTPUT«2␤3␤4␤»
finanalyst: works
finanalyst: rakudo: class AB{has @.x; method aa { .say for @.x; .say for 
@.x[1 ..^ +...@.x] } };my AB $y .=new(:x(1,2,3)); $y.aa;
p6eval: rakudo 3d3893: OUTPUT«1␤2␤3␤No applicable candidates found to 
dispatch to for 'postcircumfix:<[ ]>'. Available candidates are:␤Mu : 
Int $i;; *%_)␤Mu : Block $b;; *%_)␤Mu : !whatever_dispatch_helper ;; 
*%_)␤␤current instr.: '!postcircumfix:<[ ]>' pc 11329 
(src/builtins/Role.pir:26)␤»
finanalyst: doesnt work
masak: that is indeed odd.
colomon: ah, I believe that's an array-handling bug.
moritz_: seems like @.x is not the same kind of array as @x
moritz_: rakudo: class A { has @.x }; say A.new(:x[1, 2, 3]).x.WHAT
p6eval: rakudo 3d3893: OUTPUT«Array()␤»
colomon: ran into this same sort of problem passing @x as an argument.
moritz_: rakudo: class A { has @.x }; say A.new(:x[1, 2, 3]).x.PARROT
p6eval: rakudo 3d3893: OUTPUT«Array␤»
finanalyst: rakudo: class AB{has @.x; method aa { my @y=1,2,3; .say for 
@y; .say for @.x; .say for @.x[1 ..^ +...@.x] } };my AB $y 
.=new(:x(1,2,3)); $y.aa;
p6eval: rakudo 3d3893: OUTPUT«1␤2␤3␤1␤2␤3␤No applicable candidates found 
to dispatch to for 'postcircumfix:<[ ]>'. Available candidates are:␤Mu : 
Int $i;; *%_)␤Mu : Block $b;; *%_)␤Mu : !whatever_dispatch_helper ;; 
*%_)␤␤current instr.: '!postcircumfix:<[ ]>' pc 11329 
(src/builtins/Role.pir:26)␤»
masak: rakudo: class A { has @.x }; say A.new(:x(1, 2, 3)).x.WHAT
p6eval: rakudo 3d3893: OUTPUT«Array()␤»
finanalyst: rakudo: class AB{has @.x; method aa { my @y=1,2,3; .say for 
@y[1 .. +...@y]; .say for @.x; .say for @.x[1 ..^ +...@.x] } };my AB $y 
.=new(:x(1,2,3)); $y.aa;
p6eval: rakudo 3d3893: OUTPUT«2␤3␤␤1␤2␤3␤No applicable candidates found 
to dispatch to for 'postcircumfix:<[ ]>'. Available candidates are:␤Mu : 
Int $i;; *%_)␤Mu : Block $b;; *%_)␤Mu : !whatever_dispatch_helper ;; 
*%_)␤␤current instr.: '!postcircumfix:<[ ]>' pc 11329 
(src/builtins/Role.pir:26)␤»
finanalyst: definitely treating @y and @.x differently
moritz_: rakudo: class AB{has @.x; method aa { my @y=1,2,3; .say for 
@!x[1....@!x] } }; AB.new(:x[1, 2, 3]).aa
p6eval: rakudo 3d3893: OUTPUT«No applicable candidates found to dispatch 
to for 'postcircumfix:<[ ]>'. Available candidates are:␤Mu : Int $i;; 
*%_)␤Mu : Block $b;; *%_)␤Mu : !whatever_dispatch_helper ;; 
*%_)␤␤current instr.: '!postcircumfix:<[ ]>' pc 11329 
(src/builtins/Role.pir:26)␤»
- envi^home has joined the room
colomon: rakudo: sub foo(@a) { .say for @a[1 ..^ +...@a] }; my @a = 1... 4; 
foo(@a)
p6eval: rakudo 3d3893: OUTPUT«2␤3␤4␤»

- 18:25 -
colomon: hmmm....
finanalyst: shall i post a rakudobug?
* colomon still thinks it's related to a rakudobug from a couple of 
weeks ago...
colomon: finanalyst: yes.