example, if a base theme had:
[Derived]
Fallback=Base1
[Base1]
A=1
and a derived theme had:
[Derived]
Fallback=Base2
[Base2]
then the lookup "Derived", "A" would find 1. This is confusing and inconsistent:
it means that the value of Derived::Fallback has two values, both Base1 and Base2,
and Base1 is only accessible by the internal metric lookup. Every metric should
have only one value; "Fallback=Base1" should be completely overridden here.
(This also reduces the difference between theme lookups and path lookups; path
lookups did not have this anomaly, as they did not have access to the extra Fallback
value.)
Glenn Maynard
59f9941445