From @masak

<masak> rakudo​: class A { method WHAT { "B" } }; A.new.WHAT.say
<p6eval> rakudo 33440​: OUTPUT[B␤]
* masak cackles evilly
<pmichaud> we don't handle .WHAT properly yet.
<masak> pmichaud​: but that is correct! :)
<pmichaud> masak​: no, it's actually wrong.
<pmichaud> A.new.WHAT.say # 'A'
<pmichaud> A.new.'WHAT'.say # 'B'
<masak> pmichaud​: WHAT? :)
<masak> pmichaud​: I just redefined .WHAT, shouldn't Perl 6 let me do that?
<ruoso> masak, .WHAT is a macro
<pmichaud> yes, but to access that method you have to use ."WHAT"
<masak> aha.
<pmichaud> because... what ruoso said.
* masak had forgotten that
* masak files rakudobug, then

From @kyleha

There's a test for this in S12-methods/what.t added here​:

r20798 | Auzon | 2008-06-14 00​:18​:34 -0500 (Sat, 14 Jun 2008)

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

From @moritz

It is a macro now, tests pass.

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