-.txt

# coroutines

[Paul Woitaschek]

-.txt

-.txt

[ilya.gorbunov]

Looks like this issue in proguard: https://sourceforge.net/p/proguard/bugs/665/

[louiscad]

@Paul Woitaschek adding -dontwarn for the classes in your proguard rules file(s) should fix your issue.