parse/0: instruction: 1
parse/0:   ingredient: {name: "0", value: 0, type: 0, properties: [0: literal]}
parse/0:   product: {name: "1", value: 0, type: 1, properties: [1: integer]}
parse/0: label: +foo
parse/0: instruction: 1
parse/0:   ingredient: {name: "0", value: 0, type: 0, properties: [0: literal]}
parse/0:   product: {name: "2", value: 0, type: 1, properties: [2: integer]}
after-brace/0: recipe main
after-brace/0: copy ...
after-brace/0: copy ...