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

In my case swift development snapshot was selected instead of xcode 9.2. here are the steps and image.

1. xcode on screen and click on xcode top menu bar.
2. Than go to toolchains option and check on xcode 9.2. thats it.

Note: If no toolchain found in your xcode than download from Here and install it. (after installation restart xcode). Happy Coding!!!