"Uncaught Error: Cannot read property 'signatures' of undefined" in ParameterHintsModel

[BennyHinrichs]

Monaco@0.18.0
Chrome@76.0
Ubuntu@18.04.3

I have a function

const add = (a: number, b: number): number => a + b;

When I type add( or hit Ctrl+Space inside add(), I would expect to see (a: number, b: number): number pop up. However, it fails inside ParameterHintsModel.prototype.doTrigger on the line

if (!result || !result.value.signatures || result.value.signatures.length === 0) {

When I pause it there, it shows that result exists and result.signatures exists (with the completion item I need!), but there is no result.value. Is this from the 0.18.0 update or am I missing something?

[blutorange]

Probably this issue: #1576 It's a result of monaco-typescript using an old version of monaco-editor-core. I already submitted a PR, let's hope it gets fixed soon.

[alexdima]

Duplicate of #1576