Stack trace of thread 10066:
#0 0x0000559e9b194273 ipv6_handleifa_addrs (dhcpcd + 0x2e273)
#1 0x0000559e9b19b639 ipv6_handleifa (dhcpcd + 0x35639)
#2 0x0000559e9b18ac0c n/a (dhcpcd + 0x24c0c)
#3 0x0000559e9b189d7b if_getnetlink (dhcpcd + 0x23d7b)
#4 0x0000559e9b189e84 if_handlelink (dhcpcd + 0x23e84)
#5 0x0000559e9b17ae90 n/a (dhcpcd + 0x14e90)
#6 0x0000559e9b17386b eloop_start (dhcpcd + 0xd86b)
#7 0x0000559e9b170b39 main (dhcpcd + 0xab39)
#8 0x00007f8503cb0850 n/a (libc.so.6 + 0x23850)
#9 0x00007f8503cb090a __libc_start_main (libc.so.6 + 0x2390a)
#10 0x0000559e9b171c35 _start (dhcpcd + 0xbc35)
ELF object binary architecture: AMD x86-64
ip addr add fdc9:281f:04d7:9ee9::2/64 dev wg0
works in exactly same setup.
works in exactly same setup.