Cannot encrypt to reenabled key after migration

[Daniel Kahn Gillmor]

Hi MFPA--

On Wed 2017-04-12 15:21:38 +0100, MFPA wrote:
> I have encountered a problem with 2.1.20 writing to my public keyring.
> I was using the pre-compiled binaries on Windows 10.
>
> When editing/refreshing keys, or running gpg --check-trustdb, at the
> end of the operation the command window gradually fills up with
> repeated lines of:-
>
> gpg: waiting for file 'C:/[path]/gnupg/pubring.kbx' to become
> accessible ...
>
> These lines keep coming until I close the command window, or CTRL C
> then RETURN, or terminate "GnuPG's OpenPGP tool (32 bit)" in Task
> Manager.
>
> Oddly, creating new keys does not seem to trigger this. (Or else the
> problem is intermittent.)
>
> The problem went away when I switched back to GnuPG 2.1.19.

I've just opened a bug report about this at https://dev.gnupg.org/T3097

     --dkg