netbsd build error (12)

[syzbot]

Hello,

syzbot found the following crash on:

HEAD commit: 48e319ba remove IPv4 csum offloading for xennet(4) - it's ..
git tree: netbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=11a2ffb0100000
kernel config: https://syzkaller.appspot.com/x/.config?x=83823f5b8f4bd212
dashboard link: https://syzkaller.appspot.com/bug?extid=be8cc6502f2bacf7a6c9
compiler: g++ (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609

Unfortunately, I don't have any reproducer for this crash yet.

IMPORTANT: if you fix the bug, please add the following tag to the commit:
Reported-by: syzbot+be8cc6...@syzkaller.appspotmail.com

/syzkaller/managers/netbsd/kernel/sys/arch/xen/xen/if_xennet_xenbus.c:385:33: error: expected expression before '|' token
ERROR: Failed to make all in "/syzkaller/managers/netbsd/kernel/sys/arch/amd64/compile/obj/GENERIC_SYZKALLER"

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[Maxime Villard]

#syz invalid