toolchains cannot be used on devices? all?

xcode11.5 toolchains ,swift release 5.0 , used on devices;
how to run swift 5.0 on device with xcode11.5 ?

Unsupported Configuration
The Swift standard library from the toolchain cannot be used on devices.
Select a macOS or simulator run destination instead, or use a different toolchain that only provides the compiler.
Any news here?

Any updates to this issue?

toolchains cannot be used on devices? all?
 
 
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