If I use variable which has type set via type guard in nested anonymous class - it becomes of type any.
TypeScript Version: 3.8.3

Search Terms: Type guard, type propagation

Code

function isError(error: Error | any): error is Error { return error instanceof Error; } try { throw new Error('test'); } catch(hookError) { if(isError(hookError)) { const errorHandler = class extends Error { log() { // hookError is any console.log(hookError.message); } }; } else { throw hookError; } }

Expected behavior: hookError in console.log should have type Error

Actual behavior: hookError has type any

Playground Link: http://www.typescriptlang.org/play/?ssl=21&ssc=1&pln=1&pc=1#code/GYVwdgxgLglg9mABDAzgUQE4bhgFAUyxwC5FNsNEAfRAQzAE8BKUwi5FMoygbwChEiDPiggMSNjmRgUUehHxxgXCgG4+AXz58oGBon6DBUABbYA7ojD5L5HLgDkUfLIdN1GxBFpQIJ3CZwcADWdhhMBgJGMMC4qGEBQaHcTBGGRlFGRhAIsoiSGAAS9AAmADaEiAC8XmW0KJz4AB7OYCWcYZFZmVm9ZXAA5rhpPb1jiAD0E4iBIZ2odIyj41k5MnAVAHT9Q7PJFJsAti4otAP47stjWisa6lme+GUo+F3jphYzSWH3RlpaQA

Related Issues: I think this #30557 could be same issue, but not sure