Catch an exception thrown in a nested call

func baz(i) { die "U#{i}" }
func bar(i) { baz(i)      }

func foo {
    [0, 1].each { |i|
        try   { bar(i) }
        catch { |msg|
            msg ~~ /^U0/ ? say "Function foo() caught exception U0"
                         : die msg       # re-raise the exception
        }
    }
}

foo()

Output:

Function foo() caught exception U0
U1 at test.sf line 1. at test.sf line 9.