When executing this line:
Response response = getService().auth(new AuthEnvelope(email, password));
inside Robospice RetrofitSpiceRequest class in loadDataFromNetwork() method - app crashes (sometimes not, but method doesn't return) with this log:
12-10 11:59:30.510 17118-20973/com.package.name A/libc: Fatal signal 11 (SIGSEGV), code 1, fault addr 0x586ef16 in tid 20973 (Thread-1060)
12-10 11:59:30.612 196-196/? A/DEBUG: *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
12-10 11:59:30.612 196-196/? A/DEBUG: Build fingerprint: 'google/hammerhead/hammerhead:6.0/MRA58N/2289998:user/release-keys'
12-10 11:59:30.612 196-196/? A/DEBUG: Revision: '0'
12-10 11:59:30.612 196-196/? A/DEBUG: ABI: 'arm'
12-10 11:59:30.612 196-196/? A/DEBUG: pid: 17118, tid: 20973, name: Thread-1060 >>> com.setinbox.game <<<
12-10 11:59:30.612 196-196/? A/DEBUG: signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x586ef16
12-10 11:59:30.628 196-196/? A/DEBUG: r0 fffff7b0 r1 32f7b260 r2 716a43c8 r3 9dca9b00
12-10 11:59:30.629 196-196/? A/DEBUG: r4 00066102 r5 32f7b260 r6 7127a670 r7 0586ef02
12-10 11:59:30.629 196-196/? A/DEBUG: r8 9dca9b00 r9 9dca9b00 sl 9992df50 fp 9992dec4
12-10 11:59:30.629 196-196/? A/DEBUG: ip 9992dde0 sp 9992ddac lr b497d07d pc b4c96814 cpsr 000e0030
12-10 11:59:30.633 196-196/? A/DEBUG: backtrace:
12-10 11:59:30.633 196-196/? A/DEBUG: #00 pc 003ff814 /system/lib/libart.so (artInvokeInterfaceTrampoline+23)
12-10 11:59:30.633 196-196/? A/DEBUG: #01 pc 0018c79c /dev/ashmem/dalvik-main space 1 (deleted)
Happens ONLY on Android 6 physical devices and emulators. On other Android version it works fine.
That was a gradle plugin 2.0.0-beta2 bug. Solved by rolling back to 1.5.0.