~Does updating to Kotlin 1.5 cause a binary incompatibility with libraries that use `kotlinx-datetim...

# kotlinx-datetime

[Marc Knaup]

Does updating to Kotlin 1.5 cause a binary incompatibility with libraries that use kotlinx-datetime and are compiled with 1.4?
I guess kotlinx-datetime isn’t actually compatible with Kotlin 1.5? 😱
Must be the change of Duration from Double to Long.

java.lang.NoSuchMethodError: ‘kotlinx.datetime.Instant kotlinx.datetime.Instant.plus-LRDsOJo(long)’

[ilya.gorbunov]

Yes, indeed, we'll have to rebuild it for 1.5

[ilya.gorbunov]

Must be the change of Duration from Double to Long.

First that, but also the change of mangling for methods with inline class parameters in 1.4.30-1.5

[Marc Knaup]

Do you have any ETA on that?

[Paul Woitaschek]

Ah ouch. We're stuck with 1.5.0-M2 because we can't use 1.4 as the commonizer runs on every single gradle module there which makes bitrise timeout at 90 minutes.

[ilya.gorbunov]

We'll release a compatible version of kotlinx-datetime some time before Kotlin 1.5 release.
We're working at the moment on building it, and you'll be able to fetch artifacts from our build server as soon as they are ready — I'll provide a link to it that could be used as a maven repository.

[Paul Woitaschek]

Nice, thanks a lot 🙂

[hfhbd]

Not only kotlinx-dateime. Coroutines as well

[Marc Knaup]

How are we supposed to properly test Kotlin 1.5 before release if most libraries update only very shortly before it? 😅

[hfhbd]

And why it is marked as compatible? 😛 https://kotlinlang.org/docs/eap.html#build-details

[Marc Knaup]

No idea what you mean 😅

[hfhbd]

Kotlin 15.0.-RC:
Recommended kotlinx library versions:
- kotlinx.coroutines version: 1.4.3 :D

[ilya.gorbunov]

Coroutines should be compatible as long as you are not using its experimental API.

[Marc Knaup]

Ah, I have to scroll horizontally on the page 😂

[hfhbd]

as long as you are not using its experimental API. exactly 😄

[ilya.gorbunov]

The test build of kotlinx-datetime compatible with Kotlin 1.5 has the maven coordinates
org.jetbrains.kotlinx:kotlinx-datetime:0.2.0-dev-303
and can be obtained from the repository
<https://teamcity.jetbrains.com/guestAuth/app/rest/builds/buildType:(KotlinTools_KotlinxDatetime_Build_All),status:success,branch:kotlin-1-5,pinned:true/artifacts/content/maven/>