end of the stream or a document separator is expected (2:1)

 1 | type objective # 表明该题为客观题
 2 | outputs # 列举出每一题的正确选项与对应的得分
-----^
 3 |   - [B. 1 + 1 = 2, 50]
 4 |   - ['2', 50]
YAMLException: end of the stream or a document separator is expected (2:1)

 1 | type objective # 表明该题为客观题
 2 | outputs # 列举出每一题的正确选项与对应的得分
-----^
 3 |   - [B. 1 + 1 = 2, 50]
 4 |   - ['2', 50]
    at generateError (/usr/local/share/.config/yarn/global/node_modules/js-yaml/lib/loader.js:183:10)
    at throwError (/usr/local/share/.config/yarn/global/node_modules/js-yaml/lib/loader.js:187:9)
    at readDocument (/usr/local/share/.config/yarn/global/node_modules/js-yaml/lib/loader.js:1645:5)
    at loadDocuments (/usr/local/share/.config/yarn/global/node_modules/js-yaml/lib/loader.js:1688:5)
    at Object.load (/usr/local/share/.config/yarn/global/node_modules/js-yaml/lib/loader.js:1714:19)
    at Object.readCases [as default] (/usr/local/share/.config/yarn/global/node_modules/@hydrooj/hydrojudge/dist/cases.js:311:41)
    at JudgeTask.doSubmission (/usr/local/share/.config/yarn/global/node_modules/@hydrooj/hydrojudge/dist/hosts/vj4.js:118:44)
    at runMicrotasks (<anonymous>)
    at processTicksAndRejections (internal/process/task_queues.js:93:5)
    at async JudgeTask.handle (/usr/local/share/.config/yarn/global/node_modules/@hydrooj/hydrojudge/dist/hosts/vj4.js:81:17)
undefined
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