Got type mismatch error, but matching types Integer

[Bill Janssen]

% omc +showErrorMessages +d=pedantic /tmp/t2.mo ModelicaServices Modelica
{"Warning: Parameter nu has neither value nor start value, and is fixed during initialization (fixed=true)", "TRANSLATION", "Warning", "500"}
{"[/private/tmp/t2.mo:3:3-3:25:writable] Error: Got type mismatch error, but matching types Integer.
This is a ***COMPILER BUG***, please report it to https://trac.openmodelica.org/OpenModelica.", "TRANSLATION", "Error", "247"}
{"Error: Error occurred while flattening model t2", "TRANSLATION", "Error", "89"}
Error processing file: /tmp/t2.mo
Warning: Parameter nu has neither value nor start value, and is fixed during initialization (fixed=true)
[/private/tmp/t2.mo:3:3-3:25:writable] Error: Got type mismatch error, but matching types Integer.
This is a ***COMPILER BUG***, please report it to https://trac.openmodelica.org/OpenModelica.
Error: Error occurred while flattening model t2

# Error encountered! Exiting...
# Please check the error message and the flags.

Execution failed!
%

The model t2.mo is

model t2
  parameter Integer nu;
  input Integer[nu] vals;
  Integer y;
equation
  y = max({abs(yi_torque) for i in 1:nu});
end t2;