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<h3>
Marge Bot pushed to branch wip/marge_bot_batch_merge_job
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/583a2070f1ad9162a365b034b27c3b80daafb8df">583a2070</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-09-29T00:31:27-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Optimize NthCo (FunCo ...) in coercion opt
We were missing this case previously.
Close #18528.
Metric Decrease:
T18223
T5321Fun
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b31a3360e2ef12f3ec7eaf66b3600247c1eb36c3">b31a3360</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Linear types: fix kind inference when checking datacons
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5830a12c46e7227c276a8a71213057595ee4fc04">5830a12c</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">New linear types syntax: a %p -> b (#18459)
Implements GHC Proposal #356
Updates the haddock submodule.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bca4d36dd835c1c31c8f3364113586e1aedc6787">bca4d36d</a></strong>
<div>
<span>by Vladislav Zavialov</span>
<i>at 2020-09-29T00:32:05-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Improve error messages for (a %m) without LinearTypes
Detect when the user forgets to enable the LinearTypes
extension and produce a better error message.
Steals the (a %m) syntax from TypeOperators, the workaround
is to write (a % m) instead.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b9635d0a9bbb7f659c376b68cdc87223c864243c">b9635d0a</a></strong>
<div>
<span>by Benjamin Maurer</span>
<i>at 2020-09-29T00:32:43-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Description of flag `-H` was in 'verbosity options', moved to 'misc'.
Fixes #18699
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74c797f6b72c4d01f5e0092dfac1461f3f3dd7a2">74c797f6</a></strong>
<div>
<span>by Benjamin Maurer</span>
<i>at 2020-09-29T00:33:20-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Workaround for #18623: GHC crashes bc. under rlimit for vmem it will reserve
_all_ of it, leaving nothing for, e.g., thread stacks.
Fix will only allocate 2/3rds and check whether remainder is at least large
enough for minimum amount of thread stacks.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4365d77a0b306ada61654c3648b844cfa0f4fdcf">4365d77a</a></strong>
<div>
<span>by Ryan Scott</span>
<i>at 2020-09-29T00:33:57-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Add regression test #18501
ghc/ghc!3220 ended up fixing #18501. This patch adds a regression
test for #18501 to ensure that it stays fixed.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7c208390140f5bd91b5e3ca094755e95c8c80f5c">7c208390</a></strong>
<div>
<span>by Sebastian Graf</span>
<i>at 2020-09-29T13:07:19-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">PmCheck: Long-distance information for LocalBinds (#18626)
Now `desugarLocalBind` (formerly `desugarLet`) reasons about
* `FunBind`s that
* Have no pattern matches (so which aren't functions)
* Have a singleton match group with a single GRHS
* (which may have guards)
* and looks through trivial post-typechecking `AbsBinds` in doing so
to pick up the introduced renamings.
And desugars to `PmLet` LYG-style guards. Since GRHSs are no longer
denoted simply by `NonEmpty PmGRHS`, but also need to carry a `[PmGrd]`
for the `PmLet`s from `LocalBind`s, I added `PmGRHSs` to capture that.
Since we call out to the desugarer more often, I found that there were
superfluous warnings emitted when desugaring e.g. case expressions.
Thus, I made sure that we deactivate any warnings in the LYG desugaring
steps by the new wrapper function `noCheckDs`.
There's a regression test in `T18626`. Fixes #18626.
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e38a599220c11566b9efa043b0d4b60f5eb1d30b">e38a5992</a></strong>
<div>
<span>by Richard Eisenberg</span>
<i>at 2020-09-29T13:07:19-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Omit redundant kind equality check in solver
See updated Note [Use loose types in inert set] in
GHC.Tc.Solver.Monad.
Close #18753.
</pre>
</li>
</ul>
<h4>30 changed files:</h4>
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<a href="#8a5cd068459120cddf3814e7b9e02003b87647ba">
compiler/GHC/Builtin/Types/Prim.hs
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<li class="file-stats">
<a href="#783e5dae6e86931f06700fc088fb7d48c8a07386">
compiler/GHC/Core/Coercion.hs
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<li class="file-stats">
<a href="#975dc08a8e7942b32d621f617d5a9c1b668601dd">
compiler/GHC/Core/Coercion/Opt.hs
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<li class="file-stats">
<a href="#6fcf64907fb5bdd93082d2d1eb94e4566e735865">
compiler/GHC/Core/DataCon.hs
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<li class="file-stats">
<a href="#8d589f620b33e18b711e6288c5f5c962634aba03">
compiler/GHC/Core/Multiplicity.hs
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<li class="file-stats">
<a href="#c3967bb9d3e8f5aae2dd111b5a335b48c21c1999">
compiler/GHC/Core/Opt/Arity.hs
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<li class="file-stats">
<a href="#9aae8d40d1a22cf73eaec14fd86dfc6917ce10e5">
compiler/GHC/Core/Opt/Monad.hs
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<li class="file-stats">
<a href="#f168a93cde5e2aec2441d6331dfe500172df4af3">
compiler/GHC/Core/Opt/Simplify.hs
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<a href="#2f46b19cb85e3f7b4e72305644bc50015628c41d">
compiler/GHC/Core/Opt/Simplify/Env.hs
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<li class="file-stats">
<a href="#11ffe98a94d798427bc600e4fcfe899407536346">
compiler/GHC/Core/SimpleOpt.hs
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<a href="#75bfcd03f3ba9315d33104fcb0424c6bfeb4e334">
compiler/GHC/Hs/Decls.hs
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<li class="file-stats">
<a href="#018be522bc4813b147a1525e4f96a7a493207d96">
compiler/GHC/Hs/Type.hs
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<li class="file-stats">
<a href="#36e7b8d61b4fae8f65fca3984d01eb4076712f2b">
compiler/GHC/HsToCore/Pmc.hs
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<li class="file-stats">
<a href="#3050d0d7e4a9e93aebcc1fe0bed898ca6dac5502">
compiler/GHC/HsToCore/Pmc/Check.hs
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<li class="file-stats">
<a href="#950eaa7de202a2e915b5ff68a4cfd16e972ad359">
compiler/GHC/HsToCore/Pmc/Desugar.hs
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<li class="file-stats">
<a href="#0036eccef60579fe5f653a10eeb8bf9869964cf4">
compiler/GHC/HsToCore/Pmc/Types.hs
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<li class="file-stats">
<a href="#bf951467d4a9aa443cb109cb4c84a2891945649b">
compiler/GHC/Parser.y
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<li class="file-stats">
<a href="#b1092d2df4ded3655524830252278016d6aa5afd">
compiler/GHC/Parser/Annotation.hs
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<a href="#a1ae0a1be35c859d90b0756920a7198075fb91e1">
compiler/GHC/Parser/Lexer.x
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<li class="file-stats">
<a href="#446cb12ca6cefaf1c6eb79b7db643632744263c7">
compiler/GHC/Parser/PostProcess.hs
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<li class="file-stats">
<a href="#0c6b585a8a21f8340a85ca2cef89c4b1bf5a8953">
compiler/GHC/Tc/Solver/Monad.hs
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<li class="file-stats">
<a href="#83d23a46bb6cdc8b1edc16f1fd2c8f5c53e2c9ca">
compiler/GHC/Tc/TyCl.hs
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<a href="#261c0c5029eb34eb7436b087d77314f377ff8223">
compiler/GHC/Types/Id/Make.hs
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<a href="#d3cf57b6a5ebc234dc7689db38ef9b6cf2259c0f">
compiler/GHC/Utils/Outputable.hs
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<li class="file-stats">
<a href="#85c07986c623f3180b40021d7109edd1e6a71a93">
docs/users_guide/9.0.1-notes.rst
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<li class="file-stats">
<a href="#228f7530ac2289de7848ad95774f7aa4673c4431">
docs/users_guide/exts/linear_types.rst
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<a href="#af1d9e2647379d23697be69f8b7fc568ed0294c5">
docs/users_guide/using.rst
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<li class="file-stats">
<a href="#786588e27bcbc2a8360d2d0d3b2ce1d075797ffb">
libraries/base/Data/Typeable/Internal.hs
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<li class="file-stats">
<a href="#8e584d18427a4bfabb2a7d6fce6efcbc2afb0954">
libraries/template-haskell/Language/Haskell/TH/Ppr.hs
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<li class="file-stats">
<a href="#34aaedc89b793629cde66c63c1842ee679f621af">
rts/posix/OSMem.c
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<h5>The diff was not included because it is too large.</h5>
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