Stack overflow for nested class extends

[Per Östlund]

The following model results in a stack overflow:

class P1
  replaceable class C end C;
end P1;

class P2
  extends P1;
  redeclare class extends C end C;
end P2;

class P3
  extends P2;
  redeclare class extends C end C;

  C c;
end P3;

[Per Östlund]

This is used all over Media, so sooner or later you always run into this problem when fixing Media-problems. The cause is that instClassExtendsList2 will rename P1.C to C$parent, and create a new class for P2.C that extends C$parent. When instantiating P3 it will rename P2.C to P2.C$parent, so P2.C$parent will suddenly be extending itself, which causes an infinite loop in instExtendsList.

[Adrian Pop]

I'll take a look at it ASAP.

[Martin Sjölund]

I suggested using something like System.mo memory to generate unique IDs for these classes (reset at each inst'ion like hasExpandable, etc).

[Adrian Pop]

Or we could use the current scope full path as the unique ID.

[Per Östlund]

Fixed in r8132, see test case mofiles/ClassExtends5.