Getting error Type peg$SyntaxError is missing the following properties from type Error

[NogaMan]

When using Syntax error in tests like so

expect(() => service.parse(code)).toThrowError(SyntaxError);

I get error

Argument of type typeof peg$SyntaxError is not assignable to parameter of type new (...args: any[]) => Error
Type peg$SyntaxError is missing the following properties from type Error: name, message

It worked properly when I was using peg.js

How can I fix this?

[hildjj]

This is a consequence of the nonsense we've got to deal with IE10, which doesn't support any modern forms of JS. When we fix the code generation, this will get cleaned up, so that peg$SyntaxError will be a straight subclass of Error.

In the meantime, if anyone wants to take a crack at fixing the ES5 code generation, it's here.

[NogaMan]

I don't see a straightforward solution rather than rolling back the code to from 4 year ago, which was changed for some reason here

For now I just used a hack .toThrowError(SyntaxError as any)