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atom-haskell-archive / haskell-ghc-mod

haskell-ghc-mod atom package
https://atom.io/packages/haskell-ghc-mod
MIT License
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Error crash #51

Closed wolftune closed 8 years ago

wolftune commented 8 years ago

Haskell-ghc-mod: ghc-modi crashed on type with message 9 11 9 34 "WidgetT App IO (Route App -> [(Text, Text)] -> Text)"

No idea why

lierdakil commented 8 years ago

Could you specify ghc-mod version? Also please check if v0.9.1 fixes this.

If you can't reproduce it, I'd suspect some race condition in ghc-mod -- ghc-mod-5.4.0.0 should probably fix it. If you're already using ghc-mod-5.4.0.0, try haskell-ghc-mod-0.9.1 (there are some quirks that had to be worked out with 5.4.0.0). If you're already using both, and can reproduce this, I will need more information, or a testcase, or something.

wolftune commented 8 years ago

I clarified it is happening in a context that is template haskell related specifically

I still got the error with 0.9.1, and I'm already on ghc-mod-5.4.0.0

This is reproducible consistently. I just hover over the line $(widgetFile "blah") in a Yesod Handler

lierdakil commented 8 years ago

Sorry, I'm not terribly familiar with Yesod. Is there a git repo I can test this on, or something like that?

wolftune commented 8 years ago

the project I'm working on would work, it's public and free/libre/open, but it's a large project, so not ideal for quick testing. https://github.com/yesodweb/yesodweb.com might be a decent option. Any of the files in the code that have widgetFile in them should be comparable…

Note: when I had been using ghc-mod 5.3.0.0 git version last week and had installed it with cabal instead of stack and had the older haskell-ghc-mod, I did not get this crash. So this is something new.

lierdakil commented 8 years ago

Okay, 0.9.3 should work here. This was caused by ghc-mod overflowing internal buffer, so its response was truncated. Hopefully, new code will be more robust.