a system property is mentionned in this issue to ease the debugging of stacktraces in coroutines : https://github.com/Kotlin/kotlinx.coroutines/issues/74 . Somebody knows if it was ever implemented ?

Not yet. It is work in progress now (in a separate branch)

cool, when is it going to be merged ?

Tentatively, in the next release of

kotlinx.coroutines

, likely after KotlinConf, though.

ok so I can build it myself easily to try it ?