Simple Maven example fails with unusual error

[Johan Vos]

Hi Mark, Paul,

I can't reproduce the issue, as I'm running into these warnings that are
turned into errors, apparantly:

[WARNING] Rule 4: org.apache.maven.plugins.enforcer.RequireProperty failed
with message:
Property "io7m.api.previousVersion" evaluates to "".  This does not match
the regular expression "[0-9]+\.[0-9]+\.[0-9]+(-[a-zA-Z0-9]+)?"


On Sun, Jul 22, 2018 at 11:18 PM Mark Raynsford <org.openjdk at io7m.com>
wrote:

> On 2018-07-22T18:17:49 +0100
> Paul Ray Russell <paulrussell70 at gmail.com> wrote:
>
> > Hi Mark,
> >
> > Are you using the v. latest version maven compiler in your POM?
>
> Hello!
>
> Yes, I'm using the maven-compiler-plugin 3.7.0.
>
> --
> Mark Raynsford | http://www.io7m.com
>
>