From @moritz

<moritz> m​: class A { BEGIN {say A.^name } }
<camelia> rakudo-moar ea173d​: OUTPUT«===SORRY!===␤Cannot invoke this object
  (REPR​: Null, cs = 0)␤»

This doesn't work because .^ is implemented as a dispatcher in class Mu;
at the time the .^ call is performed, A isn't fully composed, and thus
the dispatcher​:<.^> from Mu isn't available.

If Rakudo instead rewrote it to A.HOW.name(A) internally, this fragility
could be avoided, thus I consider it a bug.

(Also, the error message is LTA).

From @jnthn

On Thu May 15 12​:43​:22 2014, moritz wrote​:

<moritz> m​: class A { BEGIN {say A.^name } }
<camelia> rakudo-moar ea173d​: OUTPUT«===SORRY!===␤Cannot invoke this object
(REPR​: Null, cs = 0)␤»

This doesn't work because .^ is implemented as a dispatcher in class Mu;
at the time the .^ call is performed, A isn't fully composed, and thus
the dispatcher​:<.^> from Mu isn't available.

If Rakudo instead rewrote it to A.HOW.name(A) internally, this fragility
could be avoided, thus I consider it a bug.

(Also, the error message is LTA).

Fixed now, and tested in S12-introspection/meta-class.t.

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

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