🔎 Search Terms

Operator '<' cannot be applied to types 'boolean' and 'never'.

🕗 Version & Regression Information

• This changed between versions 4.9.5 and 5.0.4

⏯ Playground Link

https://www.typescriptlang.org/zh/play/?target=7&ts=5.0.4#code/DYUwLgBAhhC8EDMrAM4gLAChSQEZ0WTSwHoSIBRAJyoHsqIqQAHesASwDsBzCFdsAFcoHWpyw5GIFAXwAyORAAUMADwRcASlLkA8mAAWIBp3oBbZBADG7KlcFmUYKJyvSs+eGCqCMmJjLw8ooqEOpaWAEESKggEArKahqaQA

💻 Code

let a = false
let b = false
// Error reporting situation
let res = b && (a < b)
// Other normal circumstances
b = true
res = b && (a < b)
res = false && (a < b)

🙁 Actual behavior

There were no errors before version 4.9.5
An error occurred after version 5.0.4

🙂 Expected behavior

This error should not be reported

Additional information about the issue

No response