Weird IMCC error

01-code.pl

multi sub my-die(Mu $class, *%params) {
    my Mu $p6ex = $class.new(|%params);
    my Mu $parrot_ex := pir::new__PS('Exception');
    pir::setattribute__vPsP($parrot_ex, 'payload', $p6ex);
#    pir::throw__vP($parrot_ex);
};
say 'alive';


my-die(X::Base, message => 'Foo!');

02-output

error:imcc:syntax error, unexpected '\n'
        in file '(file unknown)' line 72988894
error:imcc:syntax error ... somewhere
        in file '(file unknown)' line 72988928
syntax error ... somewhere

03 - compiled to PIR

$ ./install/bin/parrot foo.pir
error:imcc:syntax error, unexpected '\n'
        in file 'foo.pir' line 456
error:imcc:syntax error ... somewhere
        in file 'foo.pir' line 490
syntax error ... somewhere


.annotate 'line', 1
    store_lex "$parrot_ex", $P101
.annotate 'line', 4
    find_lex $P100, "$parrot_ex"
    nqp_get_sc_object $P101, "1312203255.44179", 9
    set $S100, $P101
    find_lex $P102, "$p6ex"
    setattribute $P100, $S100, $P102
.annotate 'line', 1
    perl6_decontainerize_return_value $P100,    # <-- line 456
    goto lexotic_17
  lexotic_16:
    .get_results ($P100)
  lexotic_17:
    find_lex $P101, "&EXHAUST"
    store_lex "RETURN", $P101
    perl6_type_check_return_value $P100
    .return ($P100)
.end