instance Read Integer contradicts Haskell98
http://haskell.org/onlinereport/standard-prelude.html says
instance Read Integer where
readsPrec p = readSigned readDec
However, I get contradictory results in GHCi:
Prelude Numeric> readsPrec undefined "-(21602)zzz" :: [(Integer,String)]
[(-21602,"zzz")]
Prelude Numeric> readSigned readDec "-(21602)zzz" :: [(Integer,String)]
[]
(hugs, however, gives []
for both results)
Trac metadata
Trac field | Value |
---|---|
Version | 6.6.1 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | libraries/base |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | Unknown |
Architecture | Unknown |