ERROR “swiftc failed with exit code 1” when converting to latest syntax

Question

I was trying to convert syntax of old Swift project to new one as per few suggestion on Stack Overflow I tried converting it through Edit > Convert > To latest Synta

Answer 1

As far as I know there can be multiple reasons why a compiler fails. Although cmd+alt+shift+k will help most of the time. If this fails, then click on the error message and try to debug it.

For example in the image below, if you read the message, we get to know that, there has been a name duplication. Fixing the name duplication will fix the issue.