Fails to build with GHC-9.2.8 on windows

[hasufell]

Failed to build vty-6.0.
Build log (
C:\cabal\logs\ghc-9.2.8\vty-6.0-c9d29843e440fbb3ee329f6ea71598a3854ca906.log
):
Preprocessing library for vty-6.0..
Building library for vty-6.0..
[ 1 of 24] Compiling Graphics.Text.Width ( src\Graphics\Text\Width.hs, dist\build\Graphics\Text\Width.o )
[ 2 of 24] Compiling Graphics.Vty.Attributes.Color240 ( src\Graphics\Vty\Attributes\Color240.hs, dist\build\Graphics\Vty\Attributes\Color240.o )
[ 3 of 24] Compiling Graphics.Vty.Attributes.Color ( src\Graphics\Vty\Attributes\Color.hs, dist\build\Graphics\Vty\Attributes\Color.o )
[ 4 of 24] Compiling Graphics.Vty.Attributes ( src\Graphics\Vty\Attributes.hs, dist\build\Graphics\Vty\Attributes.o )
[ 5 of 24] Compiling Graphics.Vty.DisplayAttributes ( src\Graphics\Vty\DisplayAttributes.hs, dist\build\Graphics\Vty\DisplayAttributes.o )
[ 6 of 24] Compiling Graphics.Vty.Error ( src\Graphics\Vty\Error.hs, dist\build\Graphics\Vty\Error.o )
[ 7 of 24] Compiling Graphics.Vty.Image.Internal ( src\Graphics\Vty\Image\Internal.hs, dist\build\Graphics\Vty\Image\Internal.o )
[ 8 of 24] Compiling Graphics.Vty.Image ( src\Graphics\Vty\Image.hs, dist\build\Graphics\Vty\Image.o )
[ 9 of 24] Compiling Graphics.Vty.Input.Events ( src\Graphics\Vty\Input\Events.hs, dist\build\Graphics\Vty\Input\Events.o )
[10 of 24] Compiling Graphics.Vty.Input ( src\Graphics\Vty\Input.hs, dist\build\Graphics\Vty\Input.o )
[11 of 24] Compiling Graphics.Vty.Config ( src\Graphics\Vty\Config.hs, dist\build\Graphics\Vty\Config.o )
[12 of 24] Compiling Graphics.Vty.Picture ( src\Graphics\Vty\Picture.hs, dist\build\Graphics\Vty\Picture.o )
[13 of 24] Compiling Graphics.Vty.Span ( src\Graphics\Vty\Span.hs, dist\build\Graphics\Vty\Span.o )
[14 of 24] Compiling Graphics.Vty.PictureToSpans ( src\Graphics\Vty\PictureToSpans.hs, dist\build\Graphics\Vty\PictureToSpans.o )
ghc-9.2.8.exe: panic! (the 'impossible' happened)
  (GHC version 9.2.8:
        loadArchive "C:\\ghcup\\ghc\\9.2.8\\mingw\\lib\\gcc\\x86_64-w64-mingw32\\10.2.0\\libstdc++.dll.a": failed

Please report this as a GHC bug:  https://www.haskell.org/ghc/reportabug

ghc-9.2.8.exe: Could not load `libstdc++-6.dll'. Reason: addDLL: libstdc++-6.dll or dependencies not loaded. (Win32 error 126)

Error: cabal-3.10.2.1.exe: Failed to build vty-6.0 (which is required by
exe:ghcup from ghcup-0.1.20.0). See the build log above for details.        

Maybe related: https://gitlab.haskell.org/ghc/ghc/-/issues/21435

Since GHC-9.4.x is even more busted on windows, it's not an option for me to upgrade.

[Bodigrim]

@hasufell is your build by chance forcing text>2.0? I don't see any other C++ dependencies in vty's dependency tree.

[hasufell]

It's very likely this is yet another text instance.

[Bodigrim]

Yeah, GHC 9.2 does not cope with text>=2 + TemplateHaskell on Windows (which is what's happening in Graphics.Vty.PictureToSpans). Just text works fine, that's why I'm reluctant to prohibit building it with GHC<9.4 altogether.

[hasufell]

Well, I don't know what to do.

[Bodigrim]

A tactical solution would be to derive lens manually, so that TemplateHaskell is not enabled. Graphics.Vty.PictureToSpans is the only module depending on TH and there are only two makeLenses, which would not take long to rewrite.

Dunno how @jtdaugherty feels about it though.

[jtdaugherty]

Happy to work around this. I just pushed https://github.com/jtdaugherty/vty/commit/72ce9f6ae5ea4f47efb4d3da57d8ee72a8035c91 to get away from the TH dependency in that module. I've just uploaded 6.2 to Hackage which includes this fix.