Installing wireguard-dkms fails with:

(2/2) Install DKMS modules
==> dkms install wireguard/0.0.20200318 -k 5.5.8-arch1-1.0
Error! Bad return status for module build on kernel: 5.5.8-arch1-1.0 (i686)
Consult /var/lib/dkms/wireguard/0.0.20200318/build/make.log for more information.

The file /var/lib/dkms/wireguard/0.0.20200318/build/make.log contains the following messages:

DKMS make.log for wireguard-0.0.20200318 for kernel 5.5.8-arch1-1.0 (i686)
Fri 03 Apr 2020 10:11:21 PM CEST
make: Entering directory '/usr/lib/modules/5.5.8-arch1-1.0/build'
  AR      /var/lib/dkms/wireguard/0.0.20200318/build/built-in.a
  CC [M]  /var/lib/dkms/wireguard/0.0.20200318/build/main.o
cc1: error: incompatible gcc/plugin versions
cc1: error: fail to initialize plugin ./scripts/gcc-plugins/structleak_plugin.so
make[1]: *** [scripts/Makefile.build:266: /var/lib/dkms/wireguard/0.0.20200318/build/main.o] Error 1
make: *** [Makefile:1693: /var/lib/dkms/wireguard/0.0.20200318/build] Error 2
make: Leaving directory '/usr/lib/modules/5.5.8-arch1-1.0/build'