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<h3>
Ben Gamari pushed to branch wip/backports
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/6c98a930ee952f04afd4531ec0363f760c83e0b9">6c98a930</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-28T08:37:29+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: refactor backend modules
* move backends into GHC.Num.Backend.*
* split backend selection into GHC.Num.Backend and
GHC.Num.Backend.Selected to avoid duplication with the Check backend
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74f3f581dd04cbb1018feeb1a4afb32944152387">74f3f581</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-28T08:37:29+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: implement extended GCD (#18427)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebcc09687b8d84daf00987a466834a20a9831e7b">ebcc0968</a></strong>
<div>
<span>by Sylvain Henry</span>
<i>at 2020-09-28T09:56:49+02:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Bignum: add bigNatFromWordArray
Reimplementation of integer-gmp's byteArrayToBigNat#
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/edfa896e6c2ddc89b4cd6b1d659237fe3d2efc57">edfa896e</a></strong>
<div>
<span>by Arnaud Spiwack</span>
<i>at 2020-09-29T11:41:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Pattern guards BindStmt always use multiplicity Many
Fixes #18439 .
The rhs of the pattern guard was consumed with multiplicity one, while
the pattern assumed it was Many. We use Many everywhere instead.
This is behaviour consistent with that of `case` expression. See #18738.
(cherry picked from commit 2707c4eae4cf99e6da2709e128f560d91e468357)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/a64ea9d005b6c27173e7c7e69fe632ee137a8ee6">a64ea9d0</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-29T11:41:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Disallow linear types in FFI (#18472)
(cherry picked from commit 160fba4aa306c0649c72a6dcd7c98d9782a0e74b)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f8d8c34372619dac7a17d570cbf3c4a1404ee7d3">f8d8c343</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-29T11:41:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Various documentation fixes
* Remove UnliftedFFITypes from conf. Some time ago, this extension
was undocumented and we had to silence a warning.
This is no longer needed.
* Use r'' in conf.py. This fixes a Sphinx warning:
WARNING: Support for evaluating Python 2 syntax is deprecated and will be removed in Sphinx 4.0. Convert docs/users_guide/conf.py to Python 3 syntax.
* Mark GHCForeignImportPrim as documented
* Fix formatting in template_haskell.rst
* Remove 'recursive do' from the list of unsupported items in TH
(cherry picked from commit 83407ffc7acc00cc025b9f6ed063add9ab9f9bcc)
</pre>
</li>
<li>
<strong><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/90fe5cffb0b0ba1ff86b8b9bf5299d0ed8437ad7">90fe5cff</a></strong>
<div>
<span>by Krzysztof Gogolewski</span>
<i>at 2020-09-29T11:41:25-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">Fix handling of function coercions (#18747)
This was broken when we added multiplicity to the function type.
(cherry picked from commit e124f2a7d9a5932a4c2383fd3f9dd772b2059885)
</pre>
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<h4>30 changed files:</h4>
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<a href="#783e5dae6e86931f06700fc088fb7d48c8a07386">
compiler/GHC/Core/Coercion.hs
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<a href="#08a3d553a8ca7a753d77697815b63cd85e7dfbd6">
compiler/GHC/Tc/Gen/Foreign.hs
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<a href="#3377164bfe9a1f1a8cfd588703ae1e0ea1e91cf9">
compiler/GHC/Tc/Gen/Match.hs
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<a href="#2c8c4ca2eac2ad8b108ae37fa1b91a9f7676ca1e">
docs/users_guide/conf.py
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<a href="#c69ed1e399ce62d9f23fc51d2806dab1d9b7bfd6">
docs/users_guide/expected-undocumented-flags.txt
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docs/users_guide/extending_ghc.rst
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docs/users_guide/exts/defer_type_errors.rst
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docs/users_guide/exts/ffi.rst
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docs/users_guide/exts/safe_haskell.rst
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docs/users_guide/exts/template_haskell.rst
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<a href="#915e4cd0ff4c05278c1d4b529ae8997ea58835f0">
docs/users_guide/exts/typed_holes.rst
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docs/users_guide/using-optimisation.rst
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libraries/ghc-bignum/cbits/gmp_wrappers.c
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libraries/ghc-bignum/ghc-bignum.cabal
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libraries/ghc-bignum/src/GHC/Num/Backend.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat/Check.hs
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libraries/ghc-bignum/src/GHC/Num/Backend/Check.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat/FFI.hs
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libraries/ghc-bignum/src/GHC/Num/Backend/FFI.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat/GMP.hs
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libraries/ghc-bignum/src/GHC/Num/Backend/GMP.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat/Native.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat.hs
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libraries/ghc-bignum/src/GHC/Num/BigNat.hs-boot
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libraries/ghc-bignum/src/GHC/Num/Integer.hs
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libraries/integer-gmp/src/GHC/Integer/GMP/Internals.hs
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testsuite/tests/lib/integer/all.T
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testsuite/tests/lib/integer/integerGcdExt.hs
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testsuite/tests/linear/should_fail/LinearFFI.hs
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