References to symbols that are inherited are not found. #2389
Description
If I have a class structure like this:
class Base {
/// Performs an action
void action();
}
class Child extends Base {
}
/// Perform [Child.action] as often as possible.
class Other {
}Then Dartdoc throws an error, saying that [Child.action] is an invalid link. If an explicit override is added to Child, then it finds the documentation.
In the wild, this happened when dartdoc was run on flutter/engine#20496, and I had to do this to make it work.
This makes it hard to refactor code, and in general shouldn't be necessary.