Debug Failure: no message - TS 2.7.1

[deltakosh]

Search Terms:
Debug failure, checkUnusedClassMembers

Code

It is tough to provide code as the entire repo is failing and we have no error

ts
Please clone this repo: https://github.com/BabylonJS/Babylon.js
Go to /tools/gulp
npm install
gulp

Expected behavior:
Compiling should work

Actual behavior:
We are receiving a "Debug failure" error with no more detail. Same code works with TS 2.6.2

[mhegazy]

Duplicate of #21491. Fix should be available in typescript@next today and in the upcoming typescript@2.7.2 release in the next 2 weeks.

For workarounds on 2.7.1, the crash is triggered by having ; after a method or accessor declaration in a class body, removing these should avoid the crash. See #21491 (comment) for more details.

[deltakosh]

Sorry for the duplicate, was not able to find it (Should improve my search skills)