duplicate import of same module

[Matthias Brantner]

If compiling the attached main module (main.xq), an error is raised because of a duplicate function declaration of utils:bar.
In this example (a imports b, a imports utils, and b imports utils). The problem is that a imports utils without a location hint and b imports utils with a location hint. Hence, the translator doesn't detect that the same entity is imported multiple times.

IMHO, the translator either needs to detect that the same entity is imported or the error message must indicate why the same function is declared twice.

[Matthias Brantner (matthias-brantner)]

The file dup.tgz was added: None

[Chris Hillery (ceejatec)]

We already have a cache of loaded module files. What we could do is ensure that the key for that cache is the actual URL which was read. We kind of try to do this already, but only using the URIs as derived from the import statements themselves. We don't currently take into account the URI resolver mechanism, which usually rewrites those URIs to something else.

If this sounds like a reasonable approach, the bug could be assigned to me.