Input is not echoed when GHCi is suspended and subsequently brought to foreground.

How to reproduce:

1. Start ghci.
2. Press Ctrl-Z to suspend it.
3. Type fg to bring ghci back to foreground.
4. Hit RET to get the prompt.
5. Type anything. The input is not echoed until you hit RET.

Also, if I press Ctrl-D to end the GHCi session (after it was suspended and brought back to foreground), I get

<stdin>: hWaitForInput: end of file

I am using ghc6 package from Debian Squeeze:

$ apt-cache show ghc6
Package: ghc6
Priority: optional
Section: haskell
Installed-Size: 378408
Maintainer: Kari Pahula <kaol@debian.org>
Architecture: amd64
Version: 6.12.1-13
Replaces: ghc6-doc (= 6.12.1-8), haddock
Provides: ghc, haddock, haskell-compiler, libghc6-array-dev, libghc6-array-dev-0.3.0.0-ed0c6, libghc6-base-dev, libghc6-base-dev-3.0.3.2-0092f, libghc6-base-dev-4.2.0.0-2cc27, libghc6-bin-package-db-dev, libghc6-bin-package-db-dev-0.0.0.0-4cfd2, libghc6-bytestring-dev, libghc6-bytestring-dev-0.9.1.5-125af, libghc6-cabal-dev, libghc6-cabal-dev-1.8.0.2-a7cb9, libghc6-containers-dev, libghc6-containers-dev-0.3.0.0-4a332, libghc6-directory-dev, libghc6-directory-dev-1.0.1.0-d465e, libghc6-dph-base-dev, libghc6-dph-base-dev-0.4.0-385a3, libghc6-dph-par-dev, libghc6-dph-par-dev-0.4.0-b4f33, libghc6-dph-prim-interface-dev, libghc6-dph-prim-interface-dev-0.4.0-9c8ab, libghc6-dph-prim-par-dev, libghc6-dph-prim-par-dev-0.4.0-4eccc, libghc6-dph-prim-seq-dev, libghc6-dph-prim-seq-dev-0.4.0-a2769, libghc6-dph-seq-dev, libghc6-dph-seq-dev-0.4.0-52cfd, libghc6-extensible-exceptions-dev, libghc6-extensible-exceptions-dev-0.1.1.1-95db3, libghc6-filepath-dev, libghc6-filepath-dev-1.1.0.3-3f3be, libghc6-ghc-binary-dev, libghc6-ghc-binary-dev-0.5.0.2-bb54d, libghc6-ghc-dev-6.12.1-3a757, libghc6-ghc-prim-dev, libghc6-ghc-prim-dev-0.2.0.0-9d35c, libghc6-haskell98-dev, libghc6-haskell98-dev-1.0.1.1-0fdaf, libghc6-hpc-dev, libghc6-hpc-dev-0.5.0.4-7df34, libghc6-integer-gmp-dev, libghc6-integer-gmp-dev-0.2.0.0-9a51f, libghc6-old-locale-dev, libghc6-old-locale-dev-1.0.0.2-ef43d, libghc6-old-time-dev, libghc6-old-time-dev-1.0.0.3-9efce, libghc6-pretty-dev, libghc6-pretty-dev-1.0.1.1-34534, libghc6-process-dev, libghc6-process-dev-1.0.1.2-d10eb, libghc6-random-dev, libghc6-random-dev-1.0.0.2-cf650, libghc6-rts-dev, libghc6-syb-dev, libghc6-syb-dev-0.1.0.2-3787e, libghc6-template-haskell-dev, libghc6-template-haskell-dev-2.4.0.0-bbc7c, libghc6-time-dev, libghc6-time-dev-1.1.4-1ced4, libghc6-unix-dev, libghc6-unix-dev-2.4.0.0-16adb, libghc6-utf8-string-dev, libghc6-utf8-string-dev-0.3.4-75a94
Depends: perl | perl5, gcc (>= 4:4.2), libgmp3-dev, libffi-dev, libbsd-dev, libc6-dev, libc6 (>= 2.3.4), libffi5 (>= 3.0.4), libgmp3c2, libncurses5 (>= 5.7+20100313)
Suggests: ghc6-prof, ghc6-doc, haskell-doc
Conflicts: ghc4 (<= 4.08.1-4), haddock
Breaks: cabal-install (<< 0.8.0), ghc6-doc (<= 6.12.1-8), haskell-devscripts (<< 0.6.19)
Filename: pool/main/g/ghc6/ghc6_6.12.1-13_amd64.deb
Size: 68875186
MD5sum: 84e247fb7f40f06a2fcd724d735c75e8
SHA1: 25e8d8f9ad9c8a484bd6a86494397ca44431208e
SHA256: 27096990dc41dfae6965ef16fa2bf12a3c2c3b7a8c9c77ead4f9b45cd422e9fe
Description: GHC - the Glasgow Haskell Compilation system
 Version 6 of the Glorious Glasgow Haskell Compilation system (GHC).  GHC is
 a compiler for Haskell98.
 .
 Haskell is "the" standard lazy functional programming language. Haskell98
 is the current version of the language. The language definition and
 additional documentation can be found in the `haskell-doc' package.
 Alternatively, there is an online version at
 http://haskell.org/onlinereport/.
Homepage: http://haskell.org/ghc/
Tag: devel::{compiler,interpreter,lang:haskell}, implemented-in::c, implemented-in::haskell, interface::commandline, interface::text-mode, role::program, scope::utility, uitoolkit::ncurses, works-with::software:source

Trac metadata

Trac field	Value
Version	6.12.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	GHCi
Test case
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