Dangling modifier in extends clauses not detected if name exists locally.

[brugard]

Example:

model A
end A;

model B
  extends A(p = 2);
  parameter Real p;
end B;

Example above gives NO warning when checking the class, even though there is no variable p declared in class A. This seems to be because the name p is also used in class B and the check is done after flattening the inheritance hierarchy. If we change the local name to q in class B we will get a warning. See below:

model A
end A;

model B
  extends A(p = 2);
  parameter Real q;
end B;

Check of B failed
Error: In modifier (p = 2), class or component p not found in <B>
Error: Error occured while flattening model B

Here we can see that the error message is also very misleading due to the check being done after flattening. The error message refers to class B and not the inherited class A.

[brugard]

​http://intranet/trac/mathmodelica/ticket/2436

[perost]

Still an issue, since we handle extends incorrectly.

[perost]

This is handled correctly by the new frontend, and the old frontend will not be fixed since it's too broken in this regard.