name: a example to catch act error
id: catches
steps:
  - name: prepare
    id: prepare
    acts:
      - act: irq
        key: init
  - name: step1
    id: step1
    acts:
      - act: irq
        key: act1
    catches:
      - on: err1
        then:
          - act: msg
            key: abc
      - id: catch1
        on: err1
      - id: catch2
        on: err2
      - then:
          - act: msg
            key: aaa
  - name: final
    id: final