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A comment on I’m porting the TypeScript type checker tsc to Go. Parent comment
https://www.typescriptlang.org/play?#code/CYUwxgNghgTiAEYD2A...
const a = foo[1]
should result in a bring of type `never|undefined` or `undefined` depending on flow analysis
https://www.typescriptlang.org/play?#code/CYUwxgNghgTiAEYD2A...