Resolution of symbols that are in a (direct?) parent of instantiator does not work

[JonatanWaern]

Reproducer:

group g {
    group sub is t { }
    method foo() {}
    param b = 4;
}

template t {
    method bar() { foo(); }
    param p = b;
}

Here, both 'b' and 'foo' fail to bind to their definitions in group g.

In-lining the template into group 'sub' fixes the issue, moving declaration from group 'g' to top-level fixes the issue.

[JonatanWaern]

Root cause is that our context-based lookups do not work correctly for template cases, we incorrectly reason that popping the context is equivalent to going up one object in the hierarchy, which is incorrect for template contexts.

We can fix this either by:

• Not using context-based lookups, and go through parent bindings directly
• Pre-flatten template contexts to the full context paths of the objects instantiating them

[JonatanWaern]

Fixed in #189