[Git][ghc/ghc][wip/t23511] 13 commits: Restore mingwex dependency on Windows

Matthew Pickering (@mpickering) gitlab at gitlab.haskell.org
Mon Jun 12 10:31:56 UTC 2023



Matthew Pickering pushed to branch wip/t23511 at Glasgow Haskell Compiler / GHC


Commits:
2b1a4abe by Ryan Scott at 2023-06-09T07:56:58-04:00
Restore mingwex dependency on Windows

This partially reverts some of the changes in !9475 to make `base` and
`ghc-prim` depend on the `mingwex` library on Windows. It also restores the
RTS's stubs for `mingwex`-specific symbols such as `_lock_file`.

This is done because the C runtime provides `libmingwex` nowadays, and
moreoever, not linking against `mingwex` requires downstream users to link
against it explicitly in difficult-to-predict circumstances. Better to always
link against `mingwex` and prevent users from having to do the guesswork
themselves.

See https://gitlab.haskell.org/ghc/ghc/-/merge_requests/10360#note_495873 for
the discussion that led to this.

- - - - -
28954758 by Ryan Scott at 2023-06-09T07:56:58-04:00
RtsSymbols.c: Remove mingwex symbol stubs

As of !9475, the RTS now links against `ucrt` instead of `msvcrt` on Windows,
which means that the RTS no longer needs to declare stubs for the `__mingw_*`
family of symbols. Let's remove these stubs to avoid confusion.

Fixes #23309.

- - - - -
3ab0155b by Ryan Scott at 2023-06-09T07:57:35-04:00
Consistently use validity checks for TH conversion of data constructors

We were checking that TH-spliced data declarations do not look like this:

```hs
data D :: Type = MkD Int
```

But we were only doing so for `data` declarations' data constructors, not for
`newtype`s, `data instance`s, or `newtype instance`s. This patch factors out
the necessary validity checks into its own `cvtDataDefnCons` function and uses
it in all of the places where it needs to be.

Fixes #22559.

- - - - -
a24b83dd by Matthew Pickering at 2023-06-09T15:19:00-04:00
Fix behaviour of -keep-tmp-files when used in OPTIONS_GHC pragma

This fixes the behaviour of -keep-tmp-files when used in an OPTIONS_GHC
pragma for files with module level scope.

Instead of simple not deleting the files, we also need to remove them
from the TmpFs so they are not deleted later on when all the other files
are deleted.

There are additional complications because you also need to remove the
directory where these files live from the TmpFs so we don't try to
delete those later either.

I added two tests.

1. Tests simply that -keep-tmp-files works at all with a single module
   and --make mode.
2. The other tests that temporary files are deleted for other modules
   which don't enable -keep-tmp-files.

Fixes #23339

- - - - -
dcf32882 by Matthew Pickering at 2023-06-09T15:19:00-04:00
withDeferredDiagnostics: When debugIsOn, write landmine into IORef to catch use-after-free.

Ticket #23305 reports an error where we were attempting to use the
logger which was created by withDeferredDiagnostics after its scope had
ended.

This problem would have been caught by this patch and a validate build:

```
+*** Exception: Use after free
+CallStack (from HasCallStack):
+  error, called at compiler/GHC/Driver/Make.hs:<line>:<column> in <package-id>:GHC.Driver.Make
```

This general issue is tracked by #20981

- - - - -
432c736c by Matthew Pickering at 2023-06-09T15:19:00-04:00
Don't return complete HscEnv from upsweep

By returning a complete HscEnv from upsweep the logger (as introduced by
withDeferredDiagnostics) was escaping the scope of
withDeferredDiagnostics and hence we were losing error messages.

This is reminiscent of #20981, which also talks about writing errors
into messages after their scope has ended.

See #23305 for details.

- - - - -
26013cdc by Alexander McKenna at 2023-06-09T15:19:41-04:00
Dump `SpecConstr` specialisations separately

Introduce a `-ddump-spec-constr` flag which debugs specialisations from
`SpecConstr`. These are no longer shown when you use `-ddump-spec`.

- - - - -
4639100b by Matthew Pickering at 2023-06-09T18:50:43-04:00
Add role annotations to SNat, SSymbol and SChar

Ticket #23454 explained it was possible to implement unsafeCoerce
because SNat was lacking a role annotation.

As these are supposed to be singleton types but backed by an efficient
representation the correct annotation is nominal to ensure these kinds
of coerces are forbidden.

These annotations were missed from https://github.com/haskell/core-libraries-committee/issues/85
which was implemented in 532de36870ed9e880d5f146a478453701e9db25d.

CLC Proposal: https://github.com/haskell/core-libraries-committee/issues/170

Fixes #23454

- - - - -
9c0dcff7 by Matthew Pickering at 2023-06-09T18:51:19-04:00
Remove non-existant bytearray-ops.txt.pp file from ghc.cabal.in

This broke the sdist generation.

Fixes #23489

- - - - -
273ff0c7 by David Binder at 2023-06-09T18:52:00-04:00
Regression test T13438 is no longer marked as "expect_broken" in the testsuite driver.

- - - - -
b84a2900 by Andrei Borzenkov at 2023-06-10T08:27:28-04:00
Fix -Wterm-variable-capture scope (#23434)

-Wterm-variable-capture wasn't accordant with type variable
scoping in associated types, in type classes. For example,
this code produced the warning:
  k = 12

  class C k a where
    type AT a :: k -> Type

I solved this issue by reusing machinery of newTyVarNameRn function
that is accordand with associated types: it does lookup for each free type
variable when we are in the type class context. And in this patch I
use result of this work to make sure that -Wterm-variable-capture warns
only on implicitly quantified type variables.

- - - - -
9d1a8d87 by Jorge Mendes at 2023-06-10T08:28:10-04:00
Remove redundant case statement in rts/js/mem.js.
- - - - -
d6528a1e by Matthew Pickering at 2023-06-12T10:31:53+00:00
ci: Add dependenices on necessary aarch64 jobs for head.hackage ci

These need to be added since we started testing aarch64 on head.hackage
CI. The jobs will sometimes fail because they will start before the
relevant aarch64 job has finished.

Fixes #23511

- - - - -


30 changed files:

- .gitlab-ci.yml
- compiler/GHC/Driver/Config/Core/Lint.hs
- compiler/GHC/Driver/Flags.hs
- compiler/GHC/Driver/Make.hs
- compiler/GHC/Driver/Session.hs
- compiler/GHC/Rename/HsType.hs
- compiler/GHC/ThToHs.hs
- compiler/GHC/Utils/TmpFs.hs
- compiler/Language/Haskell/Syntax/Decls.hs
- compiler/ghc.cabal.in
- configure.ac
- docs/users_guide/9.8.1-notes.rst
- docs/users_guide/debugging.rst
- libraries/base/GHC/TypeLits.hs
- libraries/base/GHC/TypeNats.hs
- libraries/base/base.cabal
- libraries/base/changelog.md
- + libraries/base/tests/T23454.hs
- + libraries/base/tests/T23454.stderr
- libraries/base/tests/all.T
- libraries/ghc-prim/ghc-prim.cabal
- rts/RtsSymbols.c
- rts/js/mem.js
- testsuite/tests/driver/Makefile
- + testsuite/tests/driver/T23339.hs
- + testsuite/tests/driver/T23339.stdout
- + testsuite/tests/driver/T23339B.hs
- + testsuite/tests/driver/T23339B.stdout
- testsuite/tests/driver/all.T
- testsuite/tests/ghci/prog018/prog018.stdout


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/61de162852ad28967626bcc3be72af09e598d921...d6528a1e995ed01e93c4a0c9c7e108f3ca5e5423

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/compare/61de162852ad28967626bcc3be72af09e598d921...d6528a1e995ed01e93c4a0c9c7e108f3ca5e5423
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