digraph block {
    N0[label="entry"];
    N1[label="exit"];
    N2[label="expr 23"];
    N3[label="local mut x"];
    N4[label="stmt let mut x = 23;"];
    N5[label="expr 23"];
    N6[label="local mut y"];
    N7[label="stmt let mut y = 23;"];
    N8[label="expr 23"];
    N9[label="local mut z"];
    N10[label="stmt let mut z = 23;"];
    N11[label="(dummy_node)"];
    N12[label="expr x"];
    N13[label="expr 0"];
    N14[label="expr x > 0"];
    N15[label="expr while x > 0 {\l    x -= 1;\l    while y > 0 {\l        y -= 1;\l        while z > 0 { z -= 1; }\l        if x > 10 { return; \"unreachable\"; }\l    }\l}\l"];
    N16[label="expr 1"];
    N17[label="expr x"];
    N18[label="expr x -= 1"];
    N19[label="stmt x -= 1;"];
    N20[label="(dummy_node)"];
    N21[label="expr y"];
    N22[label="expr 0"];
    N23[label="expr y > 0"];
    N24[label="expr while y > 0 {\l    y -= 1;\l    while z > 0 { z -= 1; }\l    if x > 10 { return; \"unreachable\"; }\l}\l"];
    N25[label="expr 1"];
    N26[label="expr y"];
    N27[label="expr y -= 1"];
    N28[label="stmt y -= 1;"];
    N29[label="(dummy_node)"];
    N30[label="expr z"];
    N31[label="expr 0"];
    N32[label="expr z > 0"];
    N33[label="expr while z > 0 { z -= 1; }"];
    N34[label="expr 1"];
    N35[label="expr z"];
    N36[label="expr z -= 1"];
    N37[label="stmt z -= 1;"];
    N38[label="block { z -= 1; }"];
    N39[label="stmt while z > 0 { z -= 1; }"];
    N40[label="expr x"];
    N41[label="expr 10"];
    N42[label="expr x > 10"];
    N43[label="expr return"];
    N44[label="(dummy_node)"];
    N45[label="stmt return;"];
    N46[label="expr \"unreachable\""];
    N47[label="stmt \"unreachable\";"];
    N48[label="block { return; \"unreachable\"; }"];
    N49[label="expr if x > 10 { return; \"unreachable\"; }"];
    N50[label="block { y -= 1; while z > 0 { z -= 1; } if x > 10 { return; \"unreachable\"; } }"];
    N51[label="block {\l    x -= 1;\l    while y > 0 {\l        y -= 1;\l        while z > 0 { z -= 1; }\l        if x > 10 { return; \"unreachable\"; }\l    }\l}\l"];
    N52[label="block {\l    let mut x = 23;\l    let mut y = 23;\l    let mut z = 23;\l    while x > 0 {\l        x -= 1;\l        while y > 0 {\l            y -= 1;\l            while z > 0 { z -= 1; }\l            if x > 10 { return; \"unreachable\"; }\l        }\l    }\l}\l"];
    N0 -> N2;
    N2 -> N3;
    N3 -> N4;
    N4 -> N5;
    N5 -> N6;
    N6 -> N7;
    N7 -> N8;
    N8 -> N9;
    N9 -> N10;
    N10 -> N11;
    N11 -> N12;
    N12 -> N13;
    N13 -> N14;
    N14 -> N15;
    N14 -> N16;
    N16 -> N17;
    N17 -> N18;
    N18 -> N19;
    N19 -> N20;
    N20 -> N21;
    N21 -> N22;
    N22 -> N23;
    N23 -> N24;
    N23 -> N25;
    N25 -> N26;
    N26 -> N27;
    N27 -> N28;
    N28 -> N29;
    N29 -> N30;
    N30 -> N31;
    N31 -> N32;
    N32 -> N33;
    N32 -> N34;
    N34 -> N35;
    N35 -> N36;
    N36 -> N37;
    N37 -> N38;
    N38 -> N29;
    N33 -> N39;
    N39 -> N40;
    N40 -> N41;
    N41 -> N42;
    N42 -> N43;
    N43 -> N1;
    N44 -> N45;
    N45 -> N46;
    N46 -> N47;
    N47 -> N48;
    N42 -> N49;
    N48 -> N49;
    N49 -> N50;
    N50 -> N20;
    N24 -> N51;
    N51 -> N11;
    N15 -> N52;
    N52 -> N1;
}