Win32 broken with GHC 7.10 RC3

Using the 32bit Windows build of GHC 7.10 RC3 (ghc-7.10.0.20150316) I can't load the Win32 library. I get the problem:

C:\Neil>ghci
GHCi, version 7.10.0.20150316: http://www.haskell.org/ghc/  :? for help
Prelude> import System.Win32
Prelude System.Win32> wRITE_DAC
<interactive>: C:\ghc\ghc-7.10.0.20150316\lib\Win32_6dnIMpnCmqmCdDB983aKnr\HSWin
32-2.3.1.0-6dnIMpnCmqmCdDB983aKnr.o: unknown symbol `_SetWindowLongPtrW'
ghc.exe: unable to load package `Win32-2.3.1.0'

This seems very serious, and breaks all packages that indirectly depend on the Win32 module (which on Windows is most of them).

Trac metadata

Trac field	Value
Version	7.10.1-rc3
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

changed weight to 5

added Tbug Trac import labels

I just tried with the 64bit Windows build and that worked fine.

Documentation on MSDN for SetWindowLongPtr https://msdn.microsoft.com/en-us/library/windows/desktop/ms644898%28v=vs.85%29.aspx indicates that SetWindowLongPtrW only exists on 64-bit.

It appears that the win32 library should be fixed to conditionally call SetWindowLongW on 32-bit, and call SetWindowLongPtrW on 64-bit.

Untested fix here for review:

https://github.com/Kludgy/win32/commit/9e52103b8b4a9bfb486e2289257ec61ac682eb89

I will submit this as a PR as soon as I am able to verify that it works.

changed milestone to %7.10.1

changed weight to 10

let's consider this a blocker until proven otherwise :)

Trac metadata

Trac field	Value
Priority	normal → highest

Trac metadata

Trac field	Value
Component	Compiler → libraries (other)

PR submitted for review:

https://github.com/haskell/win32/pull/34

mentioned in commit 2ff68c35

closed

Thanks! Merged to both master and ghc-7.10 (via 2ff68c35 & 47cd08ab).

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

added runtime crash label

added Phighest label