hls-eval-plugin test error in ubuntu related with interactive linking

[jneira]

• there had been two builds failing in the eval plugin with:

Evaluation of expressions:                                                                          FAIL (1.55s)
    Test output was different from 'test/testdata/T1.expected.hs'. Output of ["git","-c","core.fileMode=false","diff","--no-index","--text","--exit-code","test/testdata/T1.expected.hs","/tmp/T1.expected84426-112.actual"]:
    diff --git a/test/testdata/T1.expected.hs b/tmp/T1.expected84426-112.actual
    index 622b9c1..8053d04 100644
    --- a/test/testdata/T1.expected.hs
    +++ b/tmp/T1.expected84426-112.actual
    @@ -3,6 +3,16 @@ module T1 where
     import Data.List (unwords)
     
     -- >>> unwords example
    --- "This is an example of evaluation"
    +-- <BLANKLINE>
    +-- ByteCodeLink.lookupCE
    +-- During interactive linking, GHCi couldn't find the following symbol:
    +--   interactive_Ghci1_evalPrint_closure
    +-- This may be due to you not asking GHCi to load extra object files,
    +-- archives or DLLs needed by your current session.  Restart GHCi, specifying
    +-- the missing library using the -L/path/to/object/dir and -lmissinglibname
    +-- flags, or simply by naming the relevant files on the GHCi command line.
    +-- Alternatively, this link failure might indicate a bug in GHCi.
    +-- If you suspect the latter, please send a bug report to:
    +--   [email protected]
     example :: [String]
     example = ["This","is","an","example","of","eva<truncated>
    Use --accept or increase --size-cutoff to see full output.
    Use -p '$0=="eval.Evaluation of expressions"' to rerun this test only.

for ghc-8.8.4

Maybe related with the recent update of github vms: https://github.com/actions/virtual-environments/releases/tag/ubuntu18%2F20210929.1

Haskell
    Cabal 3.6.0.0
    GHCup 0.1.17.1

Worths try updating the cache?

[jneira]

One more using ghc-9.0.1: https://github.com/haskell/haskell-language-server/runs/3787949834?check_suite_focus=true

[jneira]

And 8.6.5: https://github.com/haskell/haskell-language-server/runs/3787984153?check_suite_focus=true

[jneira]

The failing test was reported by @maralorn for nix here: #610
It seems in that case the error was transient, i wonder if it is cache related

[jneira]

Some pr's has hit the issue and other has not. It seems the pr's which trigger the error are the ones updating the cabal project index state and invalidating the cache (or bringing a new dependency triggering the error as @georgefst suggested). Pr's affected:

• Remove custom version of operational #2249
• Bump Fourmolu to 0.4 #2254

[jneira]

[jneira]

Well the error was transient, as noted by @maralorn in #610, dont know he root cause, to investigate

[jneira]

No time to investigate until it arises again