-- main.mcl --
import "fmt"

$m = {"k1" => 42, "k2" => 13, "k2" => 4} # dupe!

$found = $m["k1"] || 99

print "print1" {
	msg => fmt.printf("found value of: %d", $found),
}
-- OUTPUT --
# err: errInit: duplicate map key: "k2"
