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kotlinlang

<@UB3CEA8QG>, What are the differences between versions of the libraries that have K*otlin_version* specified and those that do not?

Sample in Ktor: `1.3.2-$kotlin_version`  vs `1.3.2` . *Both work it*

Kotlin 1.4 is to be released soon. Since 1.4 introduces incompatible changes with 1.3, libraries should be compiled with Kotlin 1.4 in order to work with the new version.
`1.3.2` is for Kotlin 1.3, while a version like `1.3.2-1.4.0-rc` is to be used with Kotlin 1.4.0-rc. Once Kotlin 1.4 will be established enough (possibly Ktor 1.4.0 ?) the Kotlin version prefix will be removed, becoming the default

it is also that eap (and some rc) versions are not binary compatible with normal releases and will cause the compiler to shout at you for mixing them