failed to parse result of calling cabal (better error message)

I get in `Problems` the message `failed to parse result of calling cabal` which is hinting an internal problem. The cause was most mundane: the library in the project did not compile and in consequence the executable could not compile - strange enough, the other executable did not produce any error.

### Your environment
Output of `haskell-language-server --probe-tools` or `haskell-language-server-wrapper --probe-tools`:

```
haskell-language-server-wrapper --probe-tools
haskell-language-server version: 1.1.0.0 (GHC: 8.10.4) (PATH: /home/frank/.ghcup/bin/haskell-language-server-wrapper-1.1.0) (GIT hash: f1c096927186a93d8e3ccd4fe8385cc1b070350b)
Tool versions found on the $PATH
cabal: 3.4.0.0
stack: 2.5.1
ghc: 8.10.4
```
Which OS do you use: debian bullseye AMD64

Which lsp-client do you use: vs code

Describe your project (alternative: link to the project):

two executables, a library,

### Steps to reproduce

I am not certain that this can be reproduced - I have not seen it in other similar cases.
### Expected behaviour

I expect a reasonable error message
### Actual behaviour

```

{
"resource": "/home/frank/Workspace11/ssg/app/ssgBake.hs",
"owner": "Haskell (ssg)",
"severity": 8,
"message": "Failed to parse result of calling cabal\nBuild profile: -w ghc-8.10.4 -O1\nIn order, the following will be built (use -v for more details):\n - ssg-0.0.4.2 (lib) (file src/Uniform/Docrep.hs changed)\n - ssg-0.0.4.2 (exe:ssgbake) (configuration changed)\nPreprocessing library for ssg-0.0.4.2..\nBuilding library for ssg-0.0.4.2..\n[10 of 23] Compiling Uniform.Docrep ( src/Uniform/Docrep.hs, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Uniform/Docrep.o, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Uniform/Docrep.dyn_o )\n[12 of 23] Compiling Uniform.Pandoc ( src/Uniform/Pandoc.hs, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Uniform/Pandoc.o, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Uniform/Pandoc.dyn_o ) [Uniform.Docrep changed]\n[14 of 23] Compiling Lib.MetaPage ( src/Lib/MetaPage.hs, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Lib/MetaPage.o, /home/frank/.cache/hie-bios/dist-ssg-ccec0eed33d4ea624add0f1a2f74e2f0/build/x86_64-linux/ghc-8.10.4/ssg-0.0.4.2/build/Lib/MetaPage.dyn_o )\n\n\nsrc/Lib/MetaPage.hs:33:37: error:\n Not in scope: type constructor or class ‘DocLanguage’\n |\n33 | , dyLang :: DocLanguage\n | ^^^^^^^^^^^\n\nsrc/Lib/MetaPage.hs:48:44: error:\n Not in scope: type constructor or class ‘IndexEntry’\n |\n48 | , dyDirEntries :: [IndexEntry]\n | ^^^^^^^^^^\n\nsrc/Lib/MetaPage.hs:49:45: error:\n Not in scope: type constructor or class ‘IndexEntry’\n |\n49 | , dyFileEntries :: [IndexEntry]\n | ^^^^^^^^^^\n\nsrc/Lib/MetaPage.hs:70:10: error:\n Not in scope: type constructor or class ‘Default’\n |\n70 | instance Default MetaPage where\n | ^^^^^^^\n\nsrc/Lib/MetaPage.hs:87:19: error:\n Not in scope: type constructor or class ‘Options’\n |\n87 | docyamlOptions :: Options\n | ^^^^^^^\n\nsrc/Lib/MetaPage.hs:90:10: error:\n Not in scope: ‘fieldLabelModifier’\n |\n90 | {fieldLabelModifier = t2s . toLowerStart . s2t . drop 2 }\n | ^^^^^^^^^^^^^^^^^^\n\nsrc/Lib/MetaPage.hs:92:10: error:\n Not in scope: type constructor or class ‘ToJSON’\n |\n92 | instance ToJSON MetaPage where\n | ^^^^^^\n\nsrc/Lib/MetaPage.hs:95:10: error:\n Not in scope: type constructor or class ‘FromJSON’\n |\n95 | instance FromJSON MetaPage where\n | ^^^^^^^^\n\nsrc/Lib/MetaPage.hs:104:16: error:\n Not in scope: data constructor ‘Object’\n |\n104 | parseJSONyaml (Object o) = -- withObject \"person\" $ \\o -> \n | ^^^^^^\n\nsrc/Lib/MetaPage.hs:125:12: error:\n Illegal `..' in record construction\n Use RecordWildCards to permit this\n |\n125 | return MetaPage { .. }\n | ^^^^^^^^^^^^^^^\n\nsrc/Lib/MetaPage.hs:127:66: error:\n Not in scope: type constructor or class ‘Value’\n |\n127 | checkDocrep1 :: Path Abs Dir -> Path Abs Dir -> Path Abs File -> Value -> ErrIO MetaPage\n | ^^^^^\ncabal: Failed to build ssg-0.0.4.2 (which is required by exe:ssgbake from\nssg-0.0.4.2).\n\n\n\n",
"source": "cradle",
"startLineNumber": 1,
"startColumn": 1,
"endLineNumber": 2,
"endColumn": 1
}

```
The message 'failed ..' persists even after the code compile ok. It disappeared after I run the executable.

If this is more than a fluke I can probably give more information and try to reproduce.