Extra parens in error message's displayed code
I'm forwarding the bug #499137 from Debian's BTS.
With this example:
import System.Environment
main = do args <- filter (/= "--nofork") getArgs
return ()
I get this error message:
Couldn't match expected type `[[Char]]'
against inferred type `IO [String]'
In the second argument of `filter', namely `getArgs'
In a 'do' expression: args <- filter ((/= "--nofork")) getArgs
In the expression:
do args <- filter ((/= "--nofork")) getArgs
return ()
At some turn, the expression gained an extraneous pair of parenthesis.
Trac metadata
Trac field | Value |
---|---|
Version | 6.8.2 |
Type | Bug |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
BlockedBy | |
Related | |
Blocking | |
CC | |
Operating system | |
Architecture |