upgrade to TypeScript 3.5.0 (dev) to fix `readonly` bug (!3275) · Merge requests · Administrator / sourcegraph

Administrator requested to merge ts35 into master Apr 07, 2019

Created by: sqs

Fix at https://github.com/Microsoft/TypeScript/pull/30734 for an issue with TypeScript 3.4.x and use of readonly T[], which causes webpack to report the following error:

TypeError: Cannot read property 'instantiations' of undefined

upgrade to TypeScript 3.5.0 (dev) to fix `readonly` bug