Runtime error when trying to instantiate a class in arrow function

[vladimir-tikhonov]

Link to webassembly studio: https://webassembly.studio/?f=b674d3xk3mm

Code:

class EmptyClass { }
const builder = (): EmptyClass => new EmptyClass();
builder(); // NOTE: error occur only if builder is an arrow function

Stack trace:

Error: abort: at ~lib/rt/pure.ts:115:13
    at abort (index.js:72)
    at ~lib/rt/pure/decrement
    at ~lib/rt/pure/__release
    at start:src/index
    at start

[MaxGraey]

Thanks!
Additional note. This works fine:

const builder = (): EmptyClass => { return new EmptyClass() };
// but 
// const builder = (): EmptyClass => new EmptyClass(); <- produce runtime error