digraph block {
    N0[label="entry"];
    N1[label="exit"];
    N2[label="expr 14"];
    N3[label="local x"];
    N4[label="stmt let x = 14;"];
    N5[label="expr x"];
    N6[label="expr 1"];
    N7[label="expr x > 1"];
    N8[label="expr return"];
    N9[label="(dummy_node)"];
    N10[label="stmt return;"];
    N11[label="expr \"unreachable\""];
    N12[label="stmt \"unreachable\";"];
    N13[label="block { return; \"unreachable\"; }"];
    N14[label="expr if x > 1 { return; \"unreachable\"; }"];
    N15[label="block { let x = 14; if x > 1 { return; \"unreachable\"; } }"];
    N0 -> N2;
    N2 -> N3;
    N3 -> N4;
    N4 -> N5;
    N5 -> N6;
    N6 -> N7;
    N7 -> N8;
    N8 -> N1;
    N9 -> N10;
    N10 -> N11;
    N11 -> N12;
    N12 -> N13;
    N7 -> N14;
    N13 -> N14;
    N14 -> N15;
    N15 -> N1;
}