Incorrect warnings about unqualified imports being redundant
Mixing qualified and unqualified imports can confuse the compiler.
To reproduce:
Create the file BadWarning.hs.
module BadWarning where
import Data.Map
import qualified Data.Map as M
example = empty
Run ghci -W BadWarning.hs
, and you get:
BadWarning.hs:4:1:
Warning: The import of `Data.Map' is redundant
except perhaps to import instances from `Data.Map'
To import instances alone, use: import Data.Map()
Ok, modules loaded: BadWarning.
This looks similar to #3992 (closed), but that bug does not repro for me, so I think the issue is slightly different.
Trac metadata
Trac field | Value |
---|---|
Version | 7.0.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |