Angular 6's tslint feature is generating duplicated warnings and errors for every issue detected

After updating to Angular 6, I've noticed that every tslint error and warning is showing up twice. The versions are Tslint 5.10.0, Angular CLI 6.0.0, Typescript 2.7.2, and Codelyzer 4.3.0. Here's an example of the duplicated errors:

ERROR: file.ts[30, 58]: Missing trailing comma 
ERROR: file.ts[30, 58]: Missing trailing comma 
ERROR: file.ts[33, 29]: Missing semicolon 
ERROR: file.ts[33, 29]: Missing semicolon 

Has anyone else encountered this issue?

Answer №1

Just wanted to share my experience in case someone else runs into this problem. I encountered the same issue and discovered that having multiple TSLINT extensions enabled in VSCode (one from Microsoft and one from egamma) was causing errors and warnings to show up twice. After disabling one of the extensions, everything displayed as intended with errors and warnings only appearing once.

Hopefully this information is useful to others facing the same issue.

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