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GHC 9.8 compat and CI#9330

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ulysses4ever:ci-ghc-9.8
Dec 2, 2023
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GHC 9.8 compat and CI#9330
mergify[bot] merged 4 commits intohaskell:masterfrom
ulysses4ever:ci-ghc-9.8

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@ulysses4ever ulysses4ever commented Oct 13, 2023 •
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Template Β: This PR does not modify cabal behaviour (documentation, tests, refactoring, etc.)

Include the following checklist in your PR:

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ulysses4ever commented Oct 13, 2023

I've done basic dumb work to update the code and CI for 9.8 but there are some actual failures that need to be looked into. Help appreciated.

@ulysses4ever ulysses4ever mentioned this pull request Oct 15, 2023
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ulysses4ever commented Oct 15, 2023

I fixed the actual regressions (due to -Wx-partial) locally and now I'm wrangling with allow-newer.

@ulysses4ever ulysses4ever force-pushed the ci-ghc-9.8 branch 5 times, most recently from 0d8adfb to 2a9814e Compare October 15, 2023 20:42
@ulysses4ever ulysses4ever marked this pull request as draft October 16, 2023 01:22
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ulysses4ever commented Oct 16, 2023

Timed out while fixing all those heads and tails. Converting to draft for now.

@ulysses4ever ulysses4ever force-pushed the ci-ghc-9.8 branch 3 times, most recently from 2528de3 to d13ae95 Compare October 16, 2023 16:15
@ulysses4ever ulysses4ever marked this pull request as ready for review October 16, 2023 17:39
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ulysses4ever commented Oct 16, 2023

All right, I issue an official call for help: both in Matrix and here. The failing test is here: https://github.com/haskell/cabal/actions/runs/6536363720/job/17747928752?pr=9330

It's about a hash mismatch in Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs. Anyone has experience with this? Currently, there's one CPP clause with min base already. Should I add another one?

cabal/Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs

Lines 28 to 33 in 9f37325

#if MIN_VERSION_base(4,7,0)
, testCase "GenericPackageDescription" $
md5Check (Proxy :: Proxy GenericPackageDescription) 0x6ad1e12c6f88291e9b8c131d239eda70
, testCase "LocalBuildInfo" $
md5Check (Proxy :: Proxy LocalBuildInfo) 0xbc7ac84a9bc43345c812af222c3e5ba0
#endif

I had a cursory look over what this Structured business does and, to be honest, I'm not positive, but it looks like it tries to control ABI changes in how datatypes look like to avoid troubles with serialization when this changes...

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ulysses4ever commented Oct 16, 2023

Gershom greenlights adding some CPP to handle this apparent change in how GHC 9.8 codegens data types.

@ulysses4ever ulysses4ever marked this pull request as draft October 16, 2023 20:17
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ulysses4ever commented Oct 17, 2023

More of the same structureHash unhappiness...
https://github.com/haskell/cabal/actions/runs/6538444785/job/17754390522?pr=9330

These two guys:
https://github.com/haskell/cabal/blob/eece442d47b7e87aa2afb8f3bdc8c35b77901d67/cabal-install/tests/UnitTests/Distribution/Client/FileMonitor.hs#L34C1-L35

@Mikolaj Mikolaj mentioned this pull request Nov 13, 2023
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ulysses4ever commented Nov 13, 2023

thanks @Mikolaj! My plan was to wait when #9439 is merged and rebase. But I'm always up for rolling the dice once again!

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Mikolaj commented Nov 13, 2023

Wow, and this is one of those times when cache reset does not help (or the dice rolled wrong again).

@ulysses4ever ulysses4ever force-pushed the ci-ghc-9.8 branch 2 times, most recently from a3354e0 to 764ed85 Compare November 16, 2023 16:49
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Yipee!

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ulysses4ever commented Nov 17, 2023

It was a long ride… I'll double check that commit history makes sense (I edited it several times) and then apply the merge label.

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ulysses4ever commented Nov 17, 2023
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@ulysses4ever ulysses4ever mentioned this pull request Nov 22, 2023
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@ulysses4ever ulysses4ever force-pushed the ci-ghc-9.8 branch 2 times, most recently from b17e6e0 to fc82767 Compare November 27, 2023 14:38
@ulysses4ever ulysses4ever added merge me Tell Mergify Bot to merge and removed attention: needs-review attention: needs-help Help wanted with this issue/PR labels Nov 27, 2023
@ulysses4ever ulysses4ever force-pushed the ci-ghc-9.8 branch 3 times, most recently from c0d182e to e026e17 Compare November 29, 2023 19:42
@ulysses4ever ulysses4ever mentioned this pull request Nov 29, 2023
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@mergify mergify bot added the merge delay passed Applied (usually by Mergify) when PR approved and received no updates for 2 days label Dec 2, 2023
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GHC 9.8 compat: pacify -Wx-partial
0cac1f3
@ulysses4ever @Mikolaj
GHC 9.8 compat: update hashes of data structures as computed by Struc…
b2a36b7 
…tured

It seems, GHC 9.8 changed something in the code generation for data types.
Structured class is supposed to catch such cases.
@ulysses4ever @Mikolaj
GHC 9.8 compat: bump base, update Unknown GHC
1fc30f0 
And bump Cabal's "supported version" of GHC
@ulysses4ever @Mikolaj
CI: GHC 9.8
6a3efb5
@mergify mergify bot merged commit 4c0f867 into haskell:master Dec 2, 2023
@ulysses4ever ulysses4ever deleted the ci-ghc-9.8 branch December 3, 2023 00:30
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ulysses4ever commented Dec 3, 2023

Took only two months… 🥲

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