Build with ghc(js) 9.8.2 + 9.10.1 + 9.12.2

[ymeister]

No description provided.

[ymeister]

Needs reflex-frp/reflex#502 to be in hackage to pass the CI.

[odr]

How to check it?
I took default.nix and shell.nix from the end of PR description. Then I run cabal init and add reflex-dom into cabal deps. Also add cabal.project.
Next, I open nix-shell (successfully, took 2h), run javascript-unknown-ghcjs-cabal build and get (similar to this):

src/Data/Patch/IntMap.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      getBin: Unknown encoding for constructor
    Code: makeWrapped ''PatchIntMap

Is there a way to build now?

[ymeister]

@odr

How to check it? I took default.nix and shell.nix from the end of PR description. Then I run cabal init and add reflex-dom into cabal deps. Also add cabal.project. Next, I open nix-shell (successfully, took 2h), run javascript-unknown-ghcjs-cabal build and get (similar to this):

src/Data/Patch/IntMap.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      getBin: Unknown encoding for constructor
    Code: makeWrapped ''PatchIntMap

Is there a way to build now?

Hmm, nix-shell being successful means that patch should have already been compiled successfully, both for ghc and ghc-js. If it's the same problem as in https://gitlab.haskell.org/ghc/ghc/-/issues/25083 , then compiling with javascript-unknown-ghcjs-cabal build -j1 should resolve the issue (although I doubt it's the case). The fastest and most reliable way for me to figure out what's wrong with your case would be if you could give me some stripped down version of the project you're trying to build, be it via repo, branch or sending me an archive.

P.S. Make sure you're using the latest default.nix/shell.nix from PR description. There were some edits done to it.

[odr]

I'll share code little bit later. Now I just tried -j1 and add -v3. Now an error:

...
[ 4 of 12] Compiling Data.Patch.IntMap ( src/Data/Patch/IntMap.hs, dist/build/Data/Patch/IntMap.o )
ghc-interp.js: Message not supported with the JavaScript interpreter: InitLinker
CallStack (from HasCallStack):
  error, called at libraries/ghci/GHCi/Run.hs:142:20 in ghci-9.10.1-inplace:GHCi.Run
HasCallStack backtrace:
  collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:92:13 in ghc-internal:GHC.Internal.Exception
  toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:128:3 in ghc-internal:GHC.Internal.Exception

src/Data/Patch/IntMap.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      External interpreter terminated (1)
    Code: makeWrapped ''PatchIntMap
  |
1 | {-# LANGUAGE CPP #-}
  | ^
...

[odr]

@ymeister My project: https://github.com/odr/reflex-js. It is empty. I just added default.nix and shell.nix, then create .cabal and cabal.project and add reflex-dom into dependencies.
I still get an errors when build:

[nix-shell:~/git/reflex-js]$ javascript-unknown-ghcjs-cabal build    
Build profile: -w ghc-9.10.1 -O1
In order, the following will be built (use -v for more details):
 - patch-0.0.8.2 (lib) (requires build)

...

[ 4 of 12] Compiling Data.Patch.IntMap ( src/Data/Patch/IntMap.hs, dist/build/Data/Patch/IntMap.o )
src/Data/Patch/IntMap.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      {handle: <file descriptor: 35>}: GHCi.Message.remoteCall: end of file
    Code: makeWrapped ''PatchIntMap
  |
1 | {-# LANGUAGE CPP #-}
  | ^

...
Error: [Cabal-7125]
Failed to build patch-0.0.8.2 (which is required by exe:reflex-js from reflex-js-0.1.0.0). See the build log above for details.



[nix-shell:~/git/reflex-js]$ javascript-unknown-ghcjs-cabal build -j1
Build profile: -w ghc-9.10.1 -O1
In order, the following will be built (use -v for more details):
 - patch-0.0.8.2 (lib) (requires build)

...

[ 4 of 12] Compiling Data.Patch.IntMap ( src/Data/Patch/IntMap.hs, dist/build/Data/Patch/IntMap.o )
ghc-interp.js: Message not supported with the JavaScript interpreter: InitLinker
CallStack (from HasCallStack):
  error, called at libraries/ghci/GHCi/Run.hs:142:20 in ghci-9.10.1-inplace:GHCi.Run
HasCallStack backtrace:
  collectBacktraces, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:92:13 in ghc-internal:GHC.Internal.Exception
  toExceptionWithBacktrace, called at libraries/ghc-internal/src/GHC/Internal/Exception.hs:128:3 in ghc-internal:GHC.Internal.Exception

src/Data/Patch/IntMap.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      External interpreter terminated (1)
    Code: makeWrapped ''PatchIntMap
  |
1 | {-# LANGUAGE CPP #-}
  | ^

...

Error: [Cabal-7125]
Failed to build patch-0.0.8.2 (which is required by exe:reflex-js from reflex-js-0.1.0.0).

[ymeister]

@odr Thank you for providing an example! That said, I did not encounter any problem building it with neither native ghc nor ghc-js. Could you please try deleting dist and/or dist-newstyle directories generated by cabal build, and try to build it again?

[odr]

@odr Thank you for providing an example! That said, I did not encounter any problem building it with neither native ghc nor ghc-js. Could you please try deleting dist and/or dist-newstyle directories generated by cabal build, and try to build it again?

I removed dist-newstyle and repeat with -j1. The same...

How do you build literally? From nix-shell?

I'll ask my colleague to try this tomorrow...

[ymeister]

@odr

I literally just:

1. git clone https://github.com/odr/reflex-js.git
2. cd reflex-js
3. nix-shell -v
4. javascript-unknown-ghcjs-cabal build

That's all. My system is running on nixos-unstable (rev: cb9a96f23c491c081b38eab96d22fa958043c9fa), if that is of any help. Although, the whole thing about nix is reproducibility and all the project dependencies have been pinned, so I don't know what's interfering with your side. Your error messages say something about errors with JS interpreter, maybe you have nodejs installed on your system that somehow interferes with something? Although the nodejs_slim_latest from shell.nix should have overrode this.

[odr]

@ymeister
I checked my node.js and don't see any problem:

[nix-shell:~/git/reflex-js]$ which node
/nix/store/9ficrfvgnm4q91wgw3bmpfd34dyg6bbz-nodejs-slim-22.3.0/bin/node
[nix-shell:~/git/reflex-js]$ which nodejs
/usr/local/bin/nodejs
[nix-shell:~/git/reflex-js]$ ls -la /usr/local/bin/nodejs 
lrwxrwxrwx 1 root root 19 Aug 15 12:20 /usr/local/bin/nodejs -> /usr/local/bin/node
[nix-shell:~/git/reflex-js]$ node --version
v22.3.0
[nix-shell:~/git/reflex-js]$ nodejs --version
v22.6.0

FI: I am on Ubuntu-22.04. AMD Ryzen 7 4800H, cores=8, threads=16

I also tried to run nix-shell --pure (with adding git which nix into buildInputs) but result is the same.

[odr]

@ymeister I built it without problems on the new laptop! There is Ubuntu 24.04, no nodejs installed, multi-user nix setup (on the old one I had single-user setup).
So I am unblocked now but I heard about problems with build from others (e.g. on MacOS)...

[ali-abrar]

@ymeister could you resolve conflicts?

[ymeister]

@ymeister could you resolve conflicts?

Marked it in my todo list.