digraph block {
    N0[label="entry"];
    N1[label="exit"];
    N2[label="expr 10"];
    N3[label="local mut x"];
    N4[label="stmt let mut x = 10;"];
    N5[label="(dummy_node)"];
    N6[label="expr x"];
    N7[label="expr 0"];
    N8[label="expr x > 0"];
    N9[label="expr while x > 0 { x -= 1; }"];
    N10[label="expr 1"];
    N11[label="expr x"];
    N12[label="expr x -= 1"];
    N13[label="stmt x -= 1;"];
    N14[label="block { x -= 1; }"];
    N15[label="block { let mut x = 10; while x > 0 { x -= 1; } }"];
    N0 -> N2;
    N2 -> N3;
    N3 -> N4;
    N4 -> N5;
    N5 -> N6;
    N6 -> N7;
    N7 -> N8;
    N8 -> N9;
    N8 -> N10;
    N10 -> N11;
    N11 -> N12;
    N12 -> N13;
    N13 -> N14;
    N14 -> N5;
    N9 -> N15;
    N15 -> N1;
}