From @raydiak

See http://irclog.perlgeek.de/perl6/2015-05-05#i_10552113

Besides the obvious problem (.clone should work there), in the process of examining it I encountered another oddity​: trapping it with a try block doesn't catch the exception unless an explicit CATCH block is added with accompanying default; the implicit CATCH misses it entirely.

From @usev6

On Tue May 05 13​:41​:01 2015, raydiak@​cyberuniverses.com wrote​:

See http://irclog.perlgeek.de/perl6/2015-05-05#i_10552113

Besides the obvious problem (.clone should work there), in the process
of examining it I encountered another oddity​: trapping it with a try
block doesn't catch the exception unless an explicit CATCH block is
added with accompanying default; the implicit CATCH misses it
entirely.

It looks like there were different problems back in May, which seem to
be resolved now.

First, using .clone on an array died. This does no longer happen​:

$ perl6 -e 'my @​a = 42; @​a.clone; say "alive"'
alive

$ perl6 -e 'my @​a = 42; my @​b; try { @​b = @​a.clone }; say "alive";
@​a.push​: 44; say @​b; say @​a'
alive
[42]
[42 44]

I added two tests for this to S12-attributes/clone.t with commit
25daf16f55.

Second, using a try block didn't catch the exception. AFAIU this is
fixed and skids++ added some tests for this problem with commit
1ad644d704. Since the example with .clone no longer throws an
exception, I don't know whether additional tests are needed and how
they should look like.

Anyway, I'm closing this ticket as 'resolved'. Please reopen if you
have an idea for additional tests.

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

@usev6 - Status changed from 'open' to 'resolved'