idris should indicate file/line when it cannot find an import

[Ptival]

Steps to Reproduce

Add a non-existing import to any module. Run idris --check path/to/Module.idr

Expected Behavior

Something that would look like:

Module.idr:3:0-3:10:
  |
3 |   import Bad
  |   ~~~~~~~~~~
Can't find import Bad

Observed Behavior

Can't find import Bad

Problem

This problem makes flycheck not work well when importing a non-existing module. Since the output contains no information, flycheck can't point correctly to the line where the problem is.

[melted]

Thanks for the report! It's a very reasonable expectation.