[import,module] got biting again :(

[bearophile]

Don:

> Bug 314 is the root cause of every module bug that I know of. Basically 
> the compiler isn't keeping track of how symbols got imported. So it gets 
> everything wrong.

Bug 314 is among my voted bugs since a lot of time. Even if bug 314 isn't the only module system bug present, solving it is a good starting point.

In Comment 28 of bug 314 Christian Kamm has given a kind of partial patch, as requested. Is it good enough?

Bye,
bearophile