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Document the solution to #194 (#195)

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Moritz Kiefer 2019-11-15 14:10:29 +01:00 committed by GitHub
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@ -26,6 +26,34 @@ ghcide version: 0.0.3 (GHC: 8.6.5)
You can see the version of GHC being used by this project in the second-last line of the output with `ghc-8.6.4/`, or in in mismatch interfaces of wanted `8065` (aka 8.6.5), got `8064` (aka 8.6.4). The solution is to use the same GHC version in both places.
## “failed to load interface for ‘…’ There are files missing”
If you see a problem such as:
```console
File: ./src/File/FileStream.hs
Range: 1:0-100001:0
Source: typecheck
Severity: DsError
Message:
Program error: Failed to load interface for ‘Data.DList’
Files that failed:
There are files missing in the ‘dlist-0.8.0.7’ package,
* ./src/File/FileStream.hs
try running 'ghc-pkg check'.
Use -v to see a list of the files searched for.
```
It might be caused by `ghcide` picking up the wrong cradle. In
particular, this has been observed when running in a `nix-shell` where
`ghcide` picked up the default cradle. Try setting the cradle
explicitly, e.g., to use the cabal cradle create a `hie.yaml` file
with the following content:
```
cradle: {cabal: {component: "mylibrary"}}
```
## Works in `ghcide` but not my editor
Does `ghcide` alone work on the console? Did you first enter a Nix shell? Or run `stack exec ghcide`? If so, there are two options: