Crashes on open with Android O

Keybase for Android crashes on Android O beta 1 at startup.

It seems to be crashing due to secomp blocking syscall 142, which is select. Unfortunately, I don't know exactly where the failure happened, This could be an upstream issue in libgojni.

The log is as follows:

4415 --------- beginning of crash
4416 05-20 08:47:12.737 12353 12373 F libc : Fatal signal 31 (SIGSYS), code 1 in tid 12373 (ybase.ossifrage)
4417 05-20 08:47:12.911 12379 12379 I crash_dump32: obtaining output fd from tombstoned
4418 05-20 08:47:12.915 3555 3555 I /system/bin/tombstoned: received crash request for pid 12353
4419 05-20 08:47:12.918 12379 12379 I crash_dump32: performing dump of process 12353 (target tid = 12373)
4420 05-20 08:47:12.918 12379 12379 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
4421 05-20 08:47:12.918 12379 12379 F DEBUG : Build fingerprint: 'google/bullhead/bullhead:O/OPP2.170420.019/4021594: user/release-keys'
4422 05-20 08:47:12.918 12379 12379 F DEBUG : Revision: 'rev_1.0'
4423 05-20 08:47:12.918 12379 12379 F DEBUG : ABI: 'arm'
4424 05-20 08:47:12.918 12379 12379 F DEBUG : pid: 12353, tid: 12373, name: ybase.ossifrage >>> io.keybase.ossifrage <<<
4425 05-20 08:47:12.918 12379 12379 F DEBUG : signal 31 (SIGSYS), code 1 (SYS_SECCOMP), fault addr --------
4426 05-20 08:47:12.918 12379 12379 F DEBUG : Cause: seccomp prevented call to disallowed arm system call 142
4427 05-20 08:47:12.918 12379 12379 F DEBUG : r0 00000000 r1 00000000 r2 00000000 r3 00000000
4428 05-20 08:47:12.919 12379 12379 F DEBUG : r4 ccbe4890 r5 00000000 r6 00000000 r7 0000008e
4429 05-20 08:47:12.919 12379 12379 F DEBUG : r8 00003041 r9 ddbacfb0 sl 8aac85a0 fp 00002710
4430 05-20 08:47:12.919 12379 12379 F DEBUG : ip eb49463c sp ccbe488c lr ccf918a8 pc ccf918cc cpsr 800f0010
4431 05-20 08:47:12.972 12379 12379 F DEBUG :
4432 05-20 08:47:12.972 12379 12379 F DEBUG : backtrace:
4433 05-20 08:47:12.972 12379 12379 F DEBUG : #00 pc 002af8cc /data/app/io.keybase.ossifrage-YXGNVz8AE6HSY_XlWr- u-A==/lib/arm/libgojni.so (runtime.usleep+48)
4434 05-20 08:47:12.972 12379 12379 F DEBUG : #01 pc 00000000
4435 05-20 08:47:13.545 3887 12380 W ActivityManager: Force finishing activity io.keybase.ossifrage/.MainActivity

Start by reproducing the Android O startup crash and reviewing the provided SIGSYS log, especially the libgojni backtrace and blocked syscall 142. Trace whether the failure comes from the Android startup path or an upstream libgojni component; done means the application starts without the seccomp crash on Android O.