[Git][ghc/ghc][wip/int-index/decl-invis-binders] 8 commits: Make FloatIn robust to shadowing

Vladislav Zavialov (@int-index) gitlab at gitlab.haskell.org
Mon Jan 9 19:53:39 UTC 2023



Vladislav Zavialov pushed to branch wip/int-index/decl-invis-binders at Glasgow Haskell Compiler / GHC


Commits:
6206cb92 by Simon Peyton Jones at 2023-01-07T12:14:40-05:00
Make FloatIn robust to shadowing

This MR fixes #22622. See the new
  Note [Shadowing and name capture]

I did a bit of refactoring in sepBindsByDropPoint too.

The bug doesn't manifest in HEAD, but it did show up in 9.4,
so we should backport this patch to 9.4

- - - - -
a960ca81 by Matthew Pickering at 2023-01-07T12:15:15-05:00
T10955: Set DYLD_LIBRARY_PATH for darwin

The correct path to direct the dynamic linker on darwin is
DYLD_LIBRARY_PATH rather than LD_LIBRARY_PATH. On recent versions of OSX
using LD_LIBRARY_PATH seems to have stopped working.

For more reading see:

https://stackoverflow.com/questions/3146274/is-it-ok-to-use-dyld-library-path-on-mac-os-x-and-whats-the-dynamic-library-s

- - - - -
73484710 by Matthew Pickering at 2023-01-07T12:15:15-05:00
Skip T18623 on darwin (to add to the long list of OSs)

On recent versions of OSX, running `ulimit -v` results in

```
ulimit: setrlimit failed: invalid argument
```

Time is too short to work out what random stuff Apple has been doing
with ulimit, so just skip the test like we do for other platforms.

- - - - -
8c0ea25f by Matthew Pickering at 2023-01-07T12:15:15-05:00
Pass -Wl,-no_fixup_chains to ld64 when appropiate

Recent versions of MacOS use a version of ld where `-fixup_chains` is on by default.
This is incompatible with our usage of `-undefined dynamic_lookup`. Therefore we
explicitly disable `fixup-chains` by passing `-no_fixup_chains` to the linker on
darwin. This results in a warning of the form:

ld: warning: -undefined dynamic_lookup may not work with chained fixups

The manual explains the incompatible nature of these two flags:

     -undefined treatment
             Specifies how undefined symbols are to be treated. Options are: error, warning,
             suppress, or dynamic_lookup.  The default is error. Note: dynamic_lookup that
             depends on lazy binding will not work with chained fixups.

A relevant ticket is #22429

Here are also a few other links which are relevant to the issue:

Official comment: https://developer.apple.com/forums/thread/719961

More relevant links:

https://openradar.appspot.com/radar?id=5536824084660224

https://github.com/python/cpython/issues/97524

Note in release notes: https://developer.apple.com/documentation/xcode-release-notes/xcode-13-releas    e-notes

- - - - -
365b3045 by Matthew Pickering at 2023-01-09T02:36:20-05:00
Disable split sections on aarch64-deb10 build

See #22722

Failure on this job:

https://gitlab.haskell.org/ghc/ghc/-/jobs/1287852

```
Unexpected failures:
   /builds/ghc/ghc/tmp/ghctest-s3d8g1hj/test   spaces/testsuite/tests/th/T10828.run  T10828 [exit code non-0] (ext-interp)
   /builds/ghc/ghc/tmp/ghctest-s3d8g1hj/test   spaces/testsuite/tests/th/T13123.run  T13123 [exit code non-0] (ext-interp)
   /builds/ghc/ghc/tmp/ghctest-s3d8g1hj/test   spaces/testsuite/tests/th/T20590.run  T20590 [exit code non-0] (ext-interp)
Appending 232 stats to file: /builds/ghc/ghc/performance-metrics.tsv
```

```
Compile failed (exit code 1) errors were:
data family D_0 a_1 :: * -> *
data instance D_0 GHC.Types.Int GHC.Types.Bool :: * where
    DInt_2 :: D_0 GHC.Types.Int GHC.Types.Bool
data E_3 where MkE_4 :: a_5 -> E_3
data Foo_6 a_7 b_8 where
    MkFoo_9, MkFoo'_10 :: a_11 -> Foo_6 a_11 b_12
newtype Bar_13 :: * -> GHC.Types.Bool -> * where
    MkBar_14 :: a_15 -> Bar_13 a_15 b_16
data T10828.T (a_0 :: *) where
    T10828.MkT :: forall (a_1 :: *) . a_1 -> a_1 -> T10828.T a_1
    T10828.MkC :: forall (a_2 :: *) (b_3 :: *) . (GHC.Types.~) a_2
                                                               GHC.Types.Int => {T10828.foo :: a_2,
                                                                                 T10828.bar :: b_3} -> T10828.T GHC.Types.Int
T10828.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      ghc-iserv terminated (-4)
    Code: (do TyConI dec <- runQ $ reify (mkName "T")
              runIO $ putStrLn (pprint dec) >> hFlush stdout
              d <- runQ
                     $ [d| data T' a :: Type
                             where
                               MkT' :: a -> a -> T' a
                               MkC' :: forall a b. (a ~ Int) => {foo :: a, bar :: b} -> T' Int |]
              runIO $ putStrLn (pprint d) >> hFlush stdout
              ....)
*** unexpected failure for T10828(ext-interp)
=====> 7000 of 9215 [0, 1, 0]
=====> 7000 of 9215 [0, 1, 0]
=====> 7000 of 9215 [0, 1, 0]
=====> 7000 of 9215 [0, 1, 0]
Compile failed (exit code 1) errors were:
T13123.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      ghc-iserv terminated (-4)
    Code: ([d| data GADT
                 where MkGADT :: forall k proxy (a :: k). proxy a -> GADT |])
*** unexpected failure for T13123(ext-interp)
=====> 7100 of 9215 [0, 2, 0]
=====> 7100 of 9215 [0, 2, 0]
=====> 7200 of 9215 [0, 2, 0]
Compile failed (exit code 1) errors were:
T20590.hs:1:1: error: [GHC-87897]
    Exception when trying to run compile-time code:
      ghc-iserv terminated (-4)
    Code: ([d| data T where MkT :: forall a. a -> T |])
*** unexpected failure for T20590(ext-interp)
```

Looks fairly worrying to me.

- - - - -
965a2735 by Alan Zimmerman at 2023-01-09T02:36:20-05:00
EPA: exact print HsDocTy

To match ghc-exactprint
https://github.com/alanz/ghc-exactprint/pull/121

- - - - -
6d1a6fce by Vladislav Zavialov at 2023-01-09T18:20:59+03:00
workaround: bump template-haskell

- - - - -
7faabed4 by Vladislav Zavialov at 2023-01-09T22:52:21+03:00
WIP: Invisible binders in type declarations

Metric Decrease:
    MultiLayerModulesTH_OneShot

- - - - -


30 changed files:

- .gitlab/gen_ci.hs
- .gitlab/jobs.yaml
- compiler/GHC/Builtin/Names/TH.hs
- compiler/GHC/Core/Opt/FloatIn.hs
- compiler/GHC/Core/TyCon.hs
- compiler/GHC/Hs/Instances.hs
- compiler/GHC/Hs/Type.hs
- compiler/GHC/HsToCore/Quote.hs
- compiler/GHC/Parser/Errors/Ppr.hs
- compiler/GHC/Parser/Errors/Types.hs
- compiler/GHC/Parser/PostProcess.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/Rename/Module.hs
- compiler/GHC/Tc/Errors/Ppr.hs
- compiler/GHC/Tc/Errors/Types.hs
- compiler/GHC/Tc/Gen/HsType.hs
- compiler/GHC/Tc/Gen/Splice.hs
- compiler/GHC/Tc/TyCl.hs
- compiler/GHC/Tc/Utils/TcMType.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Types/Error/Codes.hs
- compiler/Language/Haskell/Syntax/Type.hs
- configure.ac
- libraries/ghci/GHCi/TH/Binary.hs
- libraries/template-haskell/Language/Haskell/TH.hs
- libraries/template-haskell/Language/Haskell/TH/Lib.hs
- libraries/template-haskell/Language/Haskell/TH/Lib/Internal.hs
- libraries/template-haskell/Language/Haskell/TH/Ppr.hs
- libraries/template-haskell/Language/Haskell/TH/Syntax.hs
- libraries/template-haskell/changelog.md


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4c55e8248566f8e06a20ec0033aab0f12fd51421...7faabed42b59a1bbdd864d9dc936618b0b7ff3fb

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/4c55e8248566f8e06a20ec0033aab0f12fd51421...7faabed42b59a1bbdd864d9dc936618b0b7ff3fb
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