gistfile1.txt

$ ./perl6-jdb-server -e'my @a = 1, 1, * + * ... * < 20; use java::lang::System:from<JavaRuntime>; System.get_out.println(@a)'
Listening for transport dt_socket at address: 8000
Listening for transport dt_socket at address: 8000
java.lang.RuntimeException: This type does not support positional operations
  in block <unit> at -e line 1

# Okay, great, let's debug this!

main[4] list
4,242
4,243        method WALK-AT-POS(\target,\indices) is raw {
4,244            my $target   := target;
4,245            my $indices  := nqp::getattr(indices,List,'$!reified');
4,246 =>         my int $elems = nqp::elems($indices);
4,247            my int $i     = -1;
4,248            $target := $target.AT-POS(nqp::atpos($indices,$i))
4,249              while nqp::islt_i(++$i,$elems);
4,250            $target
4,251        }
main[4] locals
Method arguments:
__local_8 = instance of C70AD33581C1438175B9337882175162CC6E987C(id=2490)
__local_3 = instance of org.perl6.nqp.runtime.ThreadContext(id=2491)
__local_1 = instance of org.perl6.nqp.runtime.CodeRef(id=2492)
__local_0 = instance of org.perl6.nqp.runtime.CallSiteDescriptor(id=2493)
__local_2 = null
__local_9 = instance of java.lang.Object[3] (id=2494)
Local variables:
__local_6 = null
__local_5 = null
__local_4 = null
__local_7 = instance of org.perl6.nqp.runtime.CallFrame(id=2495)
main[4] dump __local_9[2]
 __local_9[2] = {
    field_0: instance of __P6opaque__74(id=2497)
    field_1: instance of __P6opaque__74(id=2498)
    field_2: null
    field_3: null
    org.perl6.nqp.sixmodel.reprs.P6OpaqueBaseInstance.delegate: null
    org.perl6.nqp.sixmodel.SixModelObject.st: instance of org.perl6.nqp.sixmodel.STable(id=2499)
    org.perl6.nqp.sixmodel.SixModelObject.sc: null
}
main[4] dump org.perl6.nqp.runtime.Ops.typeName(__local_9[2], __local_3)
 org.perl6.nqp.runtime.Ops.typeName(__local_9[2], __local_3) = "Array"

# Okay, great, let's debug this at a later date!