From @masak

<masak> r​: .say for { a => 1, b => 2 }
<p6eval> rakudo b86628​: OUTPUT«("a" => 1, "b" => 2).hash␤»
<masak> shouldn't flatten, right?
<masak> r​: .say for gather take do given 1 { default { { a => 1, b => 2 } } }
<p6eval> rakudo b86628​: OUTPUT«"a" => 1␤"b" => 2␤»
<masak> also shouldn't flatten, methinks.
<masak> and yet it... does.
<jnthn> If you remove the default?
<masak> r​: .say for gather take do given 1 { { a => 1, b => 2 } }
<p6eval> rakudo b86628​: OUTPUT«("a" => 1, "b" => 2).hash␤»
<masak> either a 'when' or a 'default' is required for the bug to appear.
* masak submits rakudobug

From @jnthn

On Sat Oct 20 13​:23​:21 2012, masak wrote​:

<masak> r​: .say for { a => 1, b => 2 }
<p6eval> rakudo b86628​: OUTPUT«("a" => 1, "b" => 2).hash␤»
<masak> shouldn't flatten, right?
<masak> r​: .say for gather take do given 1 { default { { a => 1, b =>
2 } } }
<p6eval> rakudo b86628​: OUTPUT«"a" => 1␤"b" => 2␤»
<masak> also shouldn't flatten, methinks.
<masak> and yet it... does.
<jnthn> If you remove the default?
<masak> r​: .say for gather take do given 1 { { a => 1, b => 2 } }
<p6eval> rakudo b86628​: OUTPUT«("a" => 1, "b" => 2).hash␤»
<masak> either a 'when' or a 'default' is required for the bug to
appear.
* masak submits rakudobug

Both when and default no longer decontainerize. Test coverage added in S04-statements/when.t.

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

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