Simple fmu example does not work anymore

[massimo ceraolo]

Consider the package fbSystemTest.mo added to ticket #5581 created on 2019-07-12.
That ticket was created using OMEdit v1.14.0-dev-5826 (64 bit, win), which was able to create an fmu, and run a system containing that fmu, with a small accuracy issue detailed in that ticket.
I repeated that procedure today, using OpenModelica v1.14.0-dev-26545 and got a worse result. In fact, upon trying to run fbSystemFMU one receives the following error message:

[fbSystemPkg: 364:9-364:39]: Operator reinit may only be used in the body of a when equation.

the error message points to the first of the reinit rows in following code snippet, automatically generated when creating the fmu:

    when {triggerDSSEvent > flowStatesInputs, pre(nextEventTime) < time, terminal()} then
      newStatesAvailable := fmi2Functions.fmi2EventUpdate(fmi2me);
      nextEventTime := fmi2Functions.fmi2nextEventTime(fmi2me, flowStatesInputs);
      if newStatesAvailable then
        fmi_x_new := fmi2Functions.fmi2GetContinuousStates(fmi2me, numberOfContinuousStates, flowStatesInputs);
        reinit(fmi_x[3], fmi_x_new[3]);
        reinit(fmi_x[2], fmi_x_new[2]);
        reinit(fmi_x[1], fmi_x_new[1]);
      end if;
    end when;

Appearently, those reinits were well accepted up to last July.

Since the issue comes from a VERY basic modelica model, since it used to work just a few weeks ago, I set milestone for this ticket to 1.14.0