6 N4[label="expr E13b(13)"];
10 N8[label="expr match x { E13a => _y = 1, E13b(v) => _y = v + 1, }"];
11 N9[label="(dummy_node)"];
12 N10[label="local E13a"];
15 N13[label="expr _y = 1"];
16 N14[label="(dummy_node)"];
18 N16[label="pat E13b(v)"];
21 N19[label="expr v + 1"];
23 N21[label="expr _y = v + 1"];
24 N22[label="block {\l let x = E13b(13);\l let _y;\l match x { E13a => _y = 1, E13b(v) => _y = v + 1, }\l}\l"];