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
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
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