The following errors were reported by 4.7.1-rc, but not by 4.6.4 # [vuejs/vue](https://github.com/vuejs/vue) **2 of 5 projects failed to build with the old tsc** ### [tsconfig.json](https://github.com/vuejs/vue/blob/cca88b9919cb0773895bbcef649c61a206fd0a32/tsconfig.json) - `error TS2774: This condition will always return true since this function is always defined. Did you mean to call it instead?` - [src/core/util/perf.ts#L11](https://github.com/vuejs/vue/blob/cca88b9919cb0773895bbcef649c61a206fd0a32/src/core/util/perf.ts#L11) - [src/core/util/perf.ts#L12](https://github.com/vuejs/vue/blob/cca88b9919cb0773895bbcef649c61a206fd0a32/src/core/util/perf.ts#L12) - [src/core/util/perf.ts#L14](https://github.com/vuejs/vue/blob/cca88b9919cb0773895bbcef649c61a206fd0a32/src/core/util/perf.ts#L14)
The following errors were reported by 4.7.1-rc, but not by 4.6.4
vuejs/vue
2 of 5 projects failed to build with the old tsc
tsconfig.json
error TS2774: This condition will always return true since this function is always defined. Did you mean to call it instead?