I just noticed this in my dirmngr log:
DBG: >> GET /swdb.lst.sig HTTP/1.0\r\n DBG: >> Host: versions.gnupg.org\r\n DBG: TLS network write: 54/54 DBG: TLS network write: 0/0 DBG: http.c:request-header: DBG: >> \r\n DBG: TLS network write: 45/45 DBG: TLS network write: 0/0 DBG: TLS network read: 584/8192 DBG: TLS network read: 0/310 DBG: TLS network read: 0/310 gpgv: Signature made Fri Jun 2 10:47:32 2017 CEST gpgv: using RSA key D8692123C4065DEA5E0F3AB5249B39D24F25E3B6 gpgv: Good signature from "Werner Koch (dist sig)" gpgv: Ohhhh jeeee: Assertion "initialized" in gnupg_pk_is_compliant failed (/home/wk/s/gnupg/common/compliance.c:103) error running '/usr/local/bin/gpgv': terminated