Hey guys I just encountered a weird bug(?) when using

Map.forEach

in Android. The reported exception is

java.lang.NoClassDefFoundError  com.example.packagename.AdManager$executeQueuedCalls$1

I found the solution on 😒tackoverflow: already, https://stackoverflow.com/a/51215937/7684435 My code looked like this before the fix:

grouped.forEach { type, interactions -> TODO("placeholder") }

, and the kotlin compiler chose the

Map.forEach(BiConsumer<? super K, ? super V> action)

, which uses

java.util.function.BiConsumer

which isn't available on Android < 8 Oreo. Occured with kotlin version 1.2.30, also with 1.2.61, using this gradle config:

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"

I am not sure if this would be considered a bug or not

@danlew mentioned it some time ago https://blog.danlew.net/2017/03/16/kotlin-puzzler-whose-line-is-it-anyways/

okay thanks for the references