Where to report general Google Play Services crashes (with stack trace) not directly Firebase related ?

[b0b]

I have several crash report happening in class com.google.android.gms.common.api.GoogleApiActivity (using the latest Play Services client lib, v30).
Where should I report it ? There does not seem to be any place for reporting general Google Play Services crashes
There's the Admob forum for ads, this forum for Firebase, an issue tracker for Google Cast, but nothing for other GMS APIs.
So where can I report this crash, with the confidence it will be read by Google devs working on Play Services ?