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<h3>
Simon Peyton Jones pushed to branch wip/T17775
at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4>
Commits:
</h4>
<ul>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3ca52151881451ce5b3a7740d003e811b586140d">3ca52151</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-18T20:04:14+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">GHC.Core.Opt renaming
* GHC.Core.Op => GHC.Core.Opt
* GHC.Core.Opt.Simplify.Driver => GHC.Core.Opt.Driver
* GHC.Core.Opt.Tidy => GHC.Core.Tidy
* GHC.Core.Opt.WorkWrap.Lib => GHC.Core.Opt.WorkWrap.Utils
As discussed in:
* https://mail.haskell.org/pipermail/ghc-devs/2020-April/018758.html
* https://gitlab.haskell.org/ghc/ghc/issues/13009#note_264650
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/15312bbb53f247c9ed2c5cf75100a9f44c1c7227">15312bbb</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-18T20:04:46+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Modules (#13009)
* SysTools
* Parser
* GHC.Builtin
* GHC.Iface.Recomp
* Settings
Update Haddock submodule
Metric Decrease:
Naperian
parsing001
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/eaed0a3289e4c24ff1a70c6fc4b7f8bae6cd2dd3">eaed0a32</a></strong>
<div>
<span>by Alexis King</span>
<i>at 2020-04-19T03:16:44-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add missing addInScope call for letrec binders in OccurAnal
This fixes #18044, where a shadowed variable was incorrectly substituted
by the binder swap on the RHS of a floated-in letrec. This can only
happen when the uniques line up *just* right, so writing a regression
test would be very difficult, but at least the fix is small and
straightforward.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/36882493fcaa9dd2eefa7184929765189ac339ad">36882493</a></strong>
<div>
<span>by Shayne Fletcher</span>
<i>at 2020-04-20T04:36:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Derive Ord instance for Extension
Metric Increase:
T12150
T12234
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b43365ad62d73afd5c58467ab9a4f9523ab09c18">b43365ad</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-20T04:37:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix a buglet in redundant-constraint warnings
Ticket #18036 pointed out that we were reporting a redundant
constraint when it really really wasn't.
Turned out to be a buglet in the SkolemInfo for the
relevant implication constraint. Easily fixed!
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d5fae7da02cff1c7ec7b8e472f85d23aef098968">d5fae7da</a></strong>
<div>
<span>by Ömer Sinan Ağacan</span>
<i>at 2020-04-20T14:39:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Mark T12010 fragile on 32-bit
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bca02fca0119354a6201fd5d019a553015ba2dd8">bca02fca</a></strong>
<div>
<span>by Adam Sandberg Ericsson</span>
<i>at 2020-04-21T06:38:45-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">docs: drop note about not supporting shared libraries on unix systems
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6655f93324b7f1d30a6baaedfecae455d5e08e39">6655f933</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Use ParserFlags in GHC.Runtime.Eval (#17957)
Instead of passing `DynFlags` to functions such as `isStmt` and
`hasImport` in `GHC.Runtime.Eval` we pass `ParserFlags`. It's a much
simpler structure that can be created purely with `mkParserFlags'`.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/70be0fbcefa07ff164437476bf2809ea7c3ff495">70be0fbc</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">GHC.Runtime: avoid DynFlags (#17957)
* add `getPlatform :: TcM Platform` helper
* remove unused `DynFlags` parameter from `emptyPLS`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/35e43d48a9a3ab22da90c4c2ea2c805fe762b9c5">35e43d48</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Avoid DynFlags in Ppr code (#17957)
* replace `DynFlags` parameters with `SDocContext` parameters for a few
Ppr related functions: `bufLeftRenderSDoc`, `printSDoc`,
`printSDocLn`, `showSDocOneLine`.
* remove the use of `pprCols :: DynFlags -> Int` in Outputable. We
already have the information via `sdocLineLength :: SDocContext ->
Int`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ce5c2999d2e356d034fbf1045a2383c0ac24f15f">ce5c2999</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Avoid using sdocWithDynFlags (#17957)
Remove one use of `sdocWithDynFlags` from `GHC.CmmToLlvm.llvmCodeGen'`
and from `GHC.Driver.CodeOutput.profilingInitCode`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f2a98996e7792f572ab685f29742e3476be81166">f2a98996</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Avoid `sdocWithDynFlags` in `pprCLbl` (#17957)
* add a `DynFlags` parameter to `pprCLbl`
* put `maybe_underscore` and `pprAsmCLbl` in a `where` clause to avoid
`DynFlags` parameters
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/747093b7c23a1cf92b564eb3d9efe2adc15330df">747093b7</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-21T06:39:32-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">CmmToAsm DynFlags refactoring (#17957)
* Remove `DynFlags` parameter from `isDynLinkName`: `isDynLinkName` used
to test the global `ExternalDynamicRefs` flag. Now we test it outside of
`isDynLinkName`
* Add new fields into `NCGConfig`: current unit id, sse/bmi versions,
externalDynamicRefs, etc.
* Replace many uses of `DynFlags` by `NCGConfig`
* Moved `BMI/SSE` datatypes into `GHC.Platform`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ffd7eef22f197ba44f0ced97ebc988f2d7d643a4">ffd7eef2</a></strong>
<div>
<span>by Takenobu Tani</span>
<i>at 2020-04-22T23:09:50-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">stg-spec: Modify file paths according to new module hierarchy
This patch updates file paths according to new module hierarchy [1]:
* GHC/Stg/Syntax.hs <= stgSyn/StgSyn.hs
* GHC/Types/Literal.hs <= basicTypes/Literal.hs
* GHC/Types/CostCentre.hs <= profiling/CostCentre.hs
This patch also updates old file path [2]:
* utils/genapply/Main.hs <= utils/genapply/GenApply.hs
[1]: https://gitlab.haskell.org/ghc/ghc/-/wikis/Make-GHC-codebase-more-modular
[2]: commit 0cc4aad36f
[skip ci]
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e8a5d81b9358466f8889f679bfea9f796d85f7f3">e8a5d81b</a></strong>
<div>
<span>by Jonathan DK Gibbons</span>
<i>at 2020-04-22T23:10:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Refactor the `MatchResult` type in the desugarer
This way, it does a better job of proving whether or not the fail operator is used.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dcb7fe5aa2bc331fa71b537b042ec08a7c79b1ac">dcb7fe5a</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-04-22T23:10:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove panic in dsHandleMonadicFailure
Rework dsHandleMonadicFailure to be correct by construction instead of
using an unreachable panic.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cde23cd47170cc33845b6859a47dd06ee85094d8">cde23cd4</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-04-22T23:10:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Inline `adjustMatchResult`
It is just `fmap`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/72cb6bcc23d2540274aac7d1b80682ef092f1615">72cb6bcc</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-04-22T23:10:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Generalize type of `matchCanFail`
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/401f7bb312aa6c570287d313f8b587aaebca72b2">401f7bb3</a></strong>
<div>
<span>by John Ericson</span>
<i>at 2020-04-22T23:10:28-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">`MatchResult'` -> `MatchResult`
Inline `MatchResult` alias accordingly.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6c9fae2342f19ab3e6ac688825a3817b23bf1fcc">6c9fae23</a></strong>
<div>
<span>by Alexis King</span>
<i>at 2020-04-22T23:11:12-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Mark DataCon wrappers CONLIKE
Now that DataCon wrappers don’t inline until phase 0 (see commit
b78cc64e923716ac0512c299f42d4d0012306c05), it’s important that
case-of-known-constructor and RULE matching be able to see saturated
applications of DataCon wrappers in unfoldings. Making them conlike is a
natural way to do it, since they are, in fact, precisely the sort of
thing the CONLIKE pragma exists to solve.
Fixes #18012.
This also bumps the version of the parsec submodule to incorporate a
patch that avoids a metric increase on the haddock perf tests. The
increase was not really a flaw in this patch, as parsec was implicitly
relying on inlining heuristics. The patch to parsec just adds some
INLINABLE pragmas, and we get a nice performance bump out of it (well
beyond the performance we lost from this patch).
Metric Decrease:
T12234
WWRec
haddock.Cabal
haddock.base
haddock.compiler
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/48b8951e819e5d7d06ad7e168323de320d87bbd6">48b8951e</a></strong>
<div>
<span>by Roland Senn</span>
<i>at 2020-04-22T23:11:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix tab-completion for :break (#17989)
In tab-completion for the `:break` command, only those
identifiers should be shown, that are accepted in the
`:break` command. Hence these identifiers must be
- defined in an interpreted module
- top-level
- currently in scope
- listed in a `ModBreaks` value as a possible breakpoint.
The identifiers my be qualified or unqualified.
To get all possible top-level breakpoints for tab-completeion
with the correct qualification do:
1. Build the list called `pifsBreaks` of all pairs of
(Identifier, module-filename) from the `ModBreaks` values.
Here all identifiers are unqualified.
2. Build the list called `pifInscope` of all pairs of
(Identifiers, module-filename) with identifiers from
the `GlobalRdrEnv`. Take only those identifiers that are
in scope and have the correct prefix.
Here the identifiers may be qualified.
3. From the `pifInscope` list seclect all pairs that can be
found in the `pifsBreaks` list, by comparing only the
unqualified part of the identifier.
The remaining identifiers can be used for tab-completion.
This ensures, that we show only identifiers, that can be used
in a `:break` command.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/34a45ee600d5346f5d1728047fa185698ed7ee84">34a45ee6</a></strong>
<div>
<span>by Peter Trommler</span>
<i>at 2020-04-22T23:12:27-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PPC NCG: Add DWARF constants and debug labels
Fixes #11261
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ffde234854f49dba9ec4735aad74b30fd2deee29">ffde2348</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-22T23:13:06-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Do eager instantation in terms
This patch implements eager instantiation, a small but critical change
to the type inference engine, #17173. The main change is this:
When inferring types, always return an instantiated type
(for now, deeply instantiated; in future shallowly instantiated)
There is more discussion in
https://www.tweag.io/posts/2020-04-02-lazy-eager-instantiation.html
There is quite a bit of refactoring in this patch:
* The ir_inst field of GHC.Tc.Utils.TcType.InferResultk
has entirely gone. So tcInferInst and tcInferNoInst have collapsed
into tcInfer.
* Type inference of applications, via tcInferApp and
tcInferAppHead, are substantially refactored, preparing
the way for Quick Look impredicativity.
* New pure function GHC.Tc.Gen.Expr.collectHsArgs and applyHsArgs
are beatifully dual. We can see the zipper!
* GHC.Tc.Gen.Expr.tcArgs is now much nicer; no longer needs to return
a wrapper
* In HsExpr, HsTypeApp now contains the the actual type argument,
and is used in desugaring, rather than putting it in a mysterious
wrapper.
* I struggled a bit with good error reporting in
Unify.matchActualFunTysPart. It's a little bit simpler than before,
but still not great.
Some smaller things
* Rename tcPolyExpr --> tcCheckExpr
tcMonoExpr --> tcLExpr
* tcPatSig moves from GHC.Tc.Gen.HsType to GHC.Tc.Gen.Pat
Metric Decrease:
T9961
Reduction of 1.6% in comiler allocation on T9961, I think.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f84aca31290afc11acde0f86969a535e519e1d5">6f84aca3</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-04-22T23:13:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">rts: Ensure that sigaction structs are initialized
I noticed these may have uninitialized fields when looking into #18037.
The reporter says that zeroing them doesn't fix the MSAN failures they
observe but zeroing them is the right thing to do regardless.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c29f0fa6ee831ec8a223561312d7176ef87a7ece">c29f0fa6</a></strong>
<div>
<span>by Andreas Klebinger</span>
<i>at 2020-04-22T23:14:21-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add "ddump-cmm-opt" as alias for "ddump-opt-cmm".
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4b4a8b60a5b403e02117ab0a30a386664845586b">4b4a8b60</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-04-22T23:14:57-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">llvmGen: Remove -fast-llvm flag
Issue #18076 drew my attention to the undocumented `-fast-llvm` flag for
the LLVM code generator introduced in
22733532171330136d87533d523f565f2a4f102f. Speaking to Moritz about this,
the motivation for this flag was to avoid potential incompatibilities
between LLVM and the assembler/linker toolchain by making LLVM
responsible for machine-code generation.
Unfortunately, this cannot possibly work: the LLVM backend's mangler
performs a number of transforms on the assembler generated by LLVM that
are necessary for correctness. These are currently:
* mangling Haskell functions' symbol types to be `object` instead of
`function` on ELF platforms (necessary for tables-next-to-code)
* mangling AVX instructions to ensure that we don't assume alignment
(which LLVM otherwise does)
* mangling Darwin's subsections-via-symbols directives
Given that these are all necessary I don't believe that we can support
`-fast-llvm`. Let's rather remove it.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/831b66425aa3a24e769ace8d4649299ade021717">831b6642</a></strong>
<div>
<span>by Moritz Angermann</span>
<i>at 2020-04-22T23:15:33-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix build warning; add more informative information to the linker; fix linker for empty sections
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c409961aea59d2fe2ae71036a1ae6d94c4ee05c8">c409961a</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-04-22T23:16:12-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Update commentary and slightly refactor GHC.Tc.Deriv.Infer
There was some out-of-date commentary in `GHC.Tc.Deriv.Infer` that
has been modernized. Along the way, I removed the `bad` constraints
in `simplifyDeriv`, which did not serve any useful purpose (besides
being printed in debugging output).
Fixes #18073.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/125aa2b8b8bb402d7819c3a35255b65c15b8bf9a">125aa2b8</a></strong>
<div>
<span>by Ömer Sinan Ağacan</span>
<i>at 2020-04-22T23:16:51-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Remove leftover comment in tcRnModule', redundant bind
The code for the comment was moved in dc8c03b2a5c but the comment was
forgotten.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8ea37b01b6ab16937f7b528b6bbae9fade9f1361">8ea37b01</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-04-22T23:17:34-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">RTS: workaround a Linux kernel bug in timerfd
Reading a timerfd may return 0: https://lkml.org/lkml/2019/8/16/335.
This is currently undocumented behavior and documentation "won't happen
anytime soon" (https://lkml.org/lkml/2020/2/13/295).
With this patch, we just ignore the result instead of crashing. It may
fix #18033 but we can't be sure because we don't have enough
information.
See also this discussion about the kernel bug:
https://github.com/Azure/sonic-swss-common/pull/302/files/1f070e7920c2e5d63316c0105bf4481e73d72dc9
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/330b985db151c46440bba5e166c20326bc7dc1fc">330b985d</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:55:11+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Simplify subsumption
This patch implements GHC Proposal 287: Simplify subsumption
and ticket #17775.
The highlights are:
* No deeplyInstantiate or deeplySkolemise
* No tcSubTypeDS
Everything else is a knock-on effect.
I did a bit of renaming to make things consistent
* tcPolyExpr becomes tcCheckPolyExpr
ditto tcPolyExprNC
* Add new function
tcCheckMonoExpr e ty = tcMon0Expr expr (mkCheckExpType ty)
and use it
This all comopiles, but needs some eta-expansion in haskeline, and
doubtless other packages.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c81a5b2a3b14ea60ced9fc4aaf323a89f34fb630">c81a5b2a</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:58:54+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Further refactoring and simplification
Reviewed the main changes with Richard
I had to do eta-expansion in a number of tests:
T10283
T10390
T14488
T1634
T4284
T9569a
T9834
tc145
tc160
tc208
tc210
twins
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4f21c6ad2db583359696873f97ceb1a508bdd824">4f21c6ad</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-04-23T11:58:54+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bump haskeline submodule
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5d04b0fffa9815e0bccef37f427f917b689f0714">5d04b0ff</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:58:54+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Delete commented-out code
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7beff0d2637e0396338b846ae79a975ba8f8e3ae">7beff0d2</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:58:54+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix (breaking) typo
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4ce60c8b096a110c99b53a906367b1708176e68d">4ce60c8b</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:58:55+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve decomposition for FunTys
This just improves error messages, avoiding
Couldn't match type ‘Char’ with ‘Show a -> Char’
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7dd9f2ab759c3a201356a6b94e29e3dd76594223">7dd9f2ab</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-04-23T11:58:55+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bump Cabal submodule
As well as some miscellaneous fixes needed to make GHC itself
compile under simplified subsumption.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2d907b65f376364690ce48106c8d4d02564669a4">2d907b65</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T11:59:54+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Wibbles
* Get expected/actual the right way round
* Relevant-bindings fixes
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2ed80bacc41e12958908936b52215d105ce549e6">2ed80bac</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T12:07:17+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">A lot more wibbles
* Made String wired-in, so that
"foo" :: String rather than
"foo" :: [Char]
* isTauTy: account for =>
* Bring dicts into scope when desugaring HsWrappers:
addTyCsDs and hsWrapDictBinders
* Improve reporting for occurs checks where
skolems are involved e.g. 10715b, mc19, tcfail193, T13674,
T4272, T3169, T7758, 7148
Payload is in the first case of mkTyVarEqErr
* solveLocalEqualitesX: fail faster.
we want to fail fast in T11142
Another example: T15629
And keep all equalities in dropMisleading. This gives better
reporting in T12593 for example.
* Move checkDataKindSig after the solveEqualities and zonk,
obviously!
* Move ic_telescope into ForAllSkol; a nice win.
* Pretty-printing AbsBinds
We are now very close to green
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1c7d72bf0f8cee19c9eb414364ca5733e562bdf3">1c7d72bf</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T12:08:22+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">More wibbles
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dcb92d289c0e26d3dc17966828ea18904c01318e">dcb92d28</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T12:08:24+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Wibbles
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/3e4b833d71531ee9a4d10d74ff2877e4bbebf4b8">3e4b833d</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T12:08:56+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Lots more wibbles
Mainly re-engineering GHC.Tc.Errors
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/403733acdce53c406dae2836a085372374635cc9">403733ac</a></strong>
<div>
<span>by Simon Peyton Jones</span>
<i>at 2020-04-23T17:40:55+01:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Lots of fixing
...esp on Tc.Errors and error messages
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
<ul>
<li class="file-stats">
<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c">
compiler/GHC.hs
</a>
</li>
<li class="file-stats">
<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/prelude/PrelNames.hs
→
compiler/GHC/Builtin/Names.hs
</a>
</li>
<li class="file-stats">
<a href="#57f535740df5928fb0193abc3b28ca771369d8fd">
compiler/prelude/PrelNames.hs-boot
→
compiler/GHC/Builtin/Names.hs-boot
</a>
</li>
<li class="file-stats">
<a href="#06764eb0158306b83ab1998d18316392a51838c2">
compiler/prelude/THNames.hs
→
compiler/GHC/Builtin/Names/TH.hs
</a>
</li>
<li class="file-stats">
<a href="#a1519b7fe8a0d4b42e4aaa927fb6ab5b5da0fcdd">
compiler/prelude/PrimOp.hs
→
compiler/GHC/Builtin/PrimOps.hs
</a>
</li>
<li class="file-stats">
<a href="#dc9d549002b8cd260ee6d1d2fb35877c74412f91">
compiler/prelude/PrimOp.hs-boot
→
compiler/GHC/Builtin/PrimOps.hs-boot
</a>
</li>
<li class="file-stats">
<a href="#377cfd14c1f92357465df995ec6537b074051322">
compiler/prelude/TysWiredIn.hs
→
compiler/GHC/Builtin/Types.hs
</a>
</li>
<li class="file-stats">
<a href="#be7a5c9dc04ecfe7bedb2a2afcc2a51be6719577">
compiler/prelude/TysWiredIn.hs-boot
→
compiler/GHC/Builtin/Types.hs-boot
</a>
</li>
<li class="file-stats">
<a href="#02362b473a022fb921814e97a6beba08107d38b1">
compiler/typecheck/TcTypeNats.hs
→
compiler/GHC/Builtin/Types/Literals.hs
</a>
</li>
<li class="file-stats">
<a href="#8a5cd068459120cddf3814e7b9e02003b87647ba">
compiler/prelude/TysPrim.hs
→
compiler/GHC/Builtin/Types/Prim.hs
</a>
</li>
<li class="file-stats">
<a href="#8dc7109003a77f8a82e987dc1de31466aa956174">
compiler/prelude/KnownUniques.hs
→
compiler/GHC/Builtin/Uniques.hs
</a>
</li>
<li class="file-stats">
<a href="#6bcb866fdb5388db4ecc395e443a3af4888d9dd5">
compiler/prelude/KnownUniques.hs-boot
→
compiler/GHC/Builtin/Uniques.hs-boot
</a>
</li>
<li class="file-stats">
<a href="#d95fdf6575459444666f72b2281534e0558a4ba0">
compiler/prelude/PrelInfo.hs
→
compiler/GHC/Builtin/Utils.hs
</a>
</li>
<li class="file-stats">
<a href="#451725cc4e5d443a3b7c2adcdf224840f953b7e2">
compiler/prelude/primops.txt.pp
→
compiler/GHC/Builtin/primops.txt.pp
</a>
</li>
<li class="file-stats">
<a href="#073b107caa98ea426694eacd6c08b492801a51a0">
compiler/GHC/ByteCode/Instr.hs
</a>
</li>
<li class="file-stats">
<a href="#11e6f6a348be9920cecad0893a25350137524b4f">
compiler/GHC/ByteCode/Linker.hs
</a>
</li>
<li class="file-stats">
<a href="#5c66928780aaad0eb5888511dc4b0b08492c69fa">
compiler/GHC/ByteCode/Types.hs
</a>
</li>
<li class="file-stats">
<a href="#db697f6aea9f93f1583f1d5c62d25570a1e07f73">
compiler/GHC/Cmm/CLabel.hs
</a>
</li>
<li class="file-stats">
<a href="#2d3721ad8de95e1144493ca545db846672cb109f">
compiler/GHC/Cmm/Info/Build.hs
</a>
</li>
<li class="file-stats">
<a href="#e9c044b79842eca94ef683d075c4bfeca3bbb931">
compiler/GHC/Cmm/Lexer.x
</a>
</li>
<li class="file-stats">
<a href="#6fbb543d5fcea725882dd3b8d4dcd9b02022a4be">
compiler/GHC/Cmm/Monad.hs
</a>
</li>
<li class="file-stats">
<a href="#71e696f452eb493722d70306c6f304fc9b2f6a95">
compiler/GHC/Cmm/Parser.y
</a>
</li>
<li class="file-stats">
<a href="#10b61652f9817945bb54ccf8fc40f8a664ca3c30">
compiler/GHC/CmmToAsm.hs
</a>
</li>
<li class="file-stats">
<a href="#7223682bb3d11ed5bc80db47627d3d9ef7fa2ac7">
compiler/GHC/CmmToAsm/Config.hs
</a>
</li>
<li class="file-stats">
<a href="#31959c38fe93e481a7160526f11fa80db82d20b7">
compiler/GHC/CmmToAsm/Dwarf/Constants.hs
</a>
</li>
<li class="file-stats">
<a href="#ea29061dab1b843e0ea9294afc614998f3a8d08f">
compiler/GHC/CmmToAsm/Monad.hs
</a>
</li>
<li class="file-stats">
<a href="#ce4acbced40df8012ccc56db501549f835fb180b">
compiler/GHC/CmmToAsm/PIC.hs
</a>
</li>
<li class="file-stats">
<a href="#f71fa75baa7807186473f09c45a9ada1b72f4c6c">
compiler/GHC/CmmToAsm/PPC/CodeGen.hs
</a>
</li>
<li class="file-stats">
<a href="#89f8a68c62e7b5e239f8d8d532820fc086d29140">
compiler/GHC/CmmToAsm/PPC/Instr.hs
</a>
</li>
<li class="file-stats">
<a href="#3022d7d8a06ba257d13bbd18a3347522287aa684">
compiler/GHC/CmmToAsm/PPC/Ppr.hs
</a>
</li>
</ul>
<h5>The diff was not included because it is too large.</h5>
</div>
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