Unused import not always reported in a cyclic import

[PieterOlivier]

Describe the bug

When two modules import each other but one of them does not use anything from the other, the typechecker does not always report an "Unused import".

To Reproduce

Create the following completely symmetric modules:

module sandbox::unused::A

import sandbox::unused::B;

and

module sandbox::unused::B

import sandbox::unused::A;

Now trigger a typecheck in both by saving.
The import of module A in B generates an "unused import" warning.
The import of module B in A does not generate a warning.

Expected behavior
The imports in both modules should generate an "unused import" warning.

Screenshots

Version info
Latest version from rascal-core (commit 31efb70521dc7ae1ae114f60dd6960138af95a40),

[PaulKlint]

Thanks for the report. Fixed!