gcc4 pristine head

panic as soon as fs load is added.

Starting background file system checks in 60 seconds.

Wed Nov  7 03:47:32 UTC 2018

FreeBSD/powerpc (talos) (ttyu0)

login: Expensive timeout(9) function: 0xc000000003a853f8(0) 0.002209384 s
Expensive timeout(9) function: 0xc000000003aa2c90(0) 0.008392754 s
Memory modified after free 0xc0000000820cc000(4088) val=e31 @ 0xc0000000820cc000
panic: Most recently used by none

cpuid = 28
time = 1541562555
KDB: stack backtrace:
0xe00000016e2e0b30: at 0xc000000002b75950 = .kdb_backtrace+0x5c
0xe00000016e2e0c60: at 0xc000000002b13cf8 = .vpanic+0x1b4
0xe00000016e2e0d20: at 0xc000000002b13dc4 = .panic+0x38
0xe00000016e2e0db0: at 0xc000000002e8c4ec = .mtrash_ctor+0xa4
0xe00000016e2e0e40: at 0xc000000002e8aa64 = .uma_zalloc_arg+0x304
0xe00000016e2e0f20: at 0xc000000002aec19c = .malloc+0xf4
0xe00000016e2e0fd0: at 0xc000000002454634 = .zfs_kmem_alloc+0x1c
0xe00000016e2e1050: at 0xc0000000025a3e28 = .zio_buf_alloc+0xac
0xe00000016e2e10e0: at 0xc00000000246d30c = .abd_borrow_buf+0x25c
0xe00000016e2e1180: at 0xc000000002532bd8 = .vdev_initialize_restart+0x69c
0xe00000016e2e1210: at 0xc0000000025a9b88 = .zio_write_phys+0x9bc
0xe00000016e2e12d0: at 0xc0000000025aa238 = .zio_execute+0x2a0
0xe00000016e2e13a0: at 0xc0000000025aac98 = .zio_nowait+0x104
0xe00000016e2e1430: at 0xc0000000025394d4 = .vdev_label_init+0x1398
0xe00000016e2e14f0: at 0xc0000000025a346c = .zio_buf_free+0x5ec
0xe00000016e2e1590: at 0xc0000000025aa238 = .zio_execute+0x2a0
0xe00000016e2e1660: at 0xc0000000024550fc = .ddi_strtol+0x80
0xe00000016e2e16e0: at 0xc000000002b8c9e8 = .taskqueue_poll_is_busy+0x250
0xe00000016e2e17b0: at 0xc000000002b8d730 = .taskqueue_thread_loop+0xac
0xe00000016e2e1840: at 0xc000000002aca764 = .fork_exit+0x104
0xe00000016e2e1900: at 0xc000000002f12c40 = .fork_trampoline+0x10
0xe00000016e2e1930: at -0x4
KDB: enter: panic
[ thread pid 0 tid 100607 ]
Stopped at      0xc000000002b7551c = .kdb_enter+0x60:   ld      r2, r1, 0x28
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