deriving Read fails on infix data constructors with record syntax

The example below successfully performs the show, but reads returns an empty list. It fails in both GHCi and GHC. It succeeds if you replaces the infix symbol with a name.

module Main where

data A = (:<>:) { x :: Int, y :: Int } deriving (Read, Show)

t :: A
t = 1 :<>: 2

s :: String
s = show t

r :: [(A,String)]
r = reads s

main :: IO ()
main = do putStrLn s
          putStrLn (show r)

Trac metadata

Trac field	Value
Version	6.8.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
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Blocking
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Operating system
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changed weight to 5

added Tbug Trac import labels

Trac metadata

Trac field	Value
CC	→ leather@cs.uu.nl

I suppose it would've been helpful to include GHCi output, though it is trivial:

Prelude Main> main
(:<>:) {x = 1, y = 2}
[]

assigned to @simonpj

Excellent point thank you. Am fixing.

Simon

mentioned in commit 0da51cdd

mentioned in commit 38b973c7

closed

Fixed

Thu Aug 28 13:10:06 BST 2008  simonpj@microsoft.com
  * Fix Trac #2529: derived read for prefix constructor operators

Simon

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed
Test case	→ deriving/should_run/T2529

added Pnormal label