Unnecessary warning for record wildcards
When compiling a file with record wildcards, -Wall produces a warning about shadowed bindings. Since the presence of a wildcard indicates that the shadowing was intentional, this warning seems unnecessary.
I reproduced this with both 6.8.3 and 6.10.0.20081007:
{-# LANGUAGE RecordWildCards #-}
module WildCard where
data Record = Record {field1 :: Int, field2 :: Double}
test :: Record
test = let
field1 = 10
field2 = 10.0
in Record {..}
$ ghc --make -Wall WildCard.hs
[1 of 1] Compiling WildCard ( WildCard.hs, WildCard.o )
WildCard.hs:8:4:
Warning: This binding for `field1' shadows the existing binding
defined at WildCard.hs:4:22
In the binding group for: field1, field2
WildCard.hs:9:4:
Warning: This binding for `field2' shadows the existing binding
defined at WildCard.hs:4:37
In the binding group for: field1, field2
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.3 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |