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sub lives_and_tests_ok (&&;$) {
    my ($case, $test, $name) = @_;
...
    my $result = eval { $case->() };
    $@ ? fail($name) : $test->($result, $name);
}

lives_and_tests_ok (
    sub { $o->answer },
    sub { is shift, 42, shift },
    "answer is 42"
);

sub lives_and_tests_ok (&&;$) {
    my ($case, $test, $name) = @_;
...
    local ($b, $a) = ($name, eval { $case->() });
    $@ ? fail($name) : $test->($result, $name);
}

lives_and_tests_ok (
    sub { $o->answer },
    sub { is $a, 42, $b },
    "answer is 42"
);