<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html lang="en" style='--code-editor-font: var(--default-mono-font, "Menlo"), DejaVu Sans Mono, Liberation Mono, Consolas, Ubuntu Mono, Courier New, andale mono, lucida console, monospace;'>
<head>
<meta content="text/html; charset=US-ASCII" http-equiv="Content-Type">
<title>
GitLab
</title>
<style data-premailer="ignore" type="text/css">
a { color: #1068bf; }
</style>
<style>img {
max-width: 100%; height: auto;
}
body {
font-size: 0.875rem;
}
body {
-webkit-text-shadow: rgba(255,255,255,0.01) 0 0 1px;
}
body {
font-family: var(--default-regular-font, -apple-system),BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Ubuntu,Cantarell,"Helvetica Neue",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji"; font-size: inherit;
}
</style>
</head>
<body style='font-size: inherit; -webkit-text-shadow: rgba(255,255,255,0.01) 0 0 1px; font-family: var(--default-regular-font, -apple-system),BlinkMacSystemFont,"Segoe UI",Roboto,"Noto Sans",Ubuntu,Cantarell,"Helvetica Neue",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";'>
<div class="content">
<h3 style="margin-top: 20px; margin-bottom: 10px;">
Simon Peyton Jones pushed to branch wip/T23051 at <a href="https://gitlab.haskell.org/ghc/ghc">Glasgow Haskell Compiler / GHC</a>
</h3>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
Commits:
</h4>
<ul>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c9c26cd60692feadcec78c51041df1dbf0caaf8f">c9c26cd6</a></strong>
<div>
<span> by Teo Camarasu </span> <i> at 2023-03-16T12:17:50-04:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Fix BCO creation setting caps when -j > -N
* Remove calls to 'setNumCapabilities' in 'createBCOs'
These calls exist to ensure that 'createBCOs' can benefit from
parallelism. But this is not the right place to call
`setNumCapabilities`. Furthermore the logic differs from that in the
driver causing the capability count to be raised and lowered at each TH
call if -j > -N.
* Remove 'BCOOpts'
No longer needed as it was only used to thread the job count down to `createBCOs`
Resolves #23049
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5ddbf5edcb64f04b3527efcac727813080380aa6">5ddbf5ed</a></strong>
<div>
<span> by Teo Camarasu </span> <i> at 2023-03-16T12:17:50-04:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Add changelog entry for #23049
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6e3ce9a4ce2509ce779102ec6f8e8ddcb676f94b">6e3ce9a4</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2023-03-16T12:18:26-04:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>configure: Fix FIND_CXX_STD_LIB test on Darwin
Annoyingly, Darwin's <cstddef> includes <version> and APFS is
case-insensitive. Consequently, it will end up #including the
`VERSION` file generated by the `configure` script on the second
and subsequent runs of the `configure` script.
See #23116.</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/19d6d0397c223bbec3c372d2b8c04c2e356c44a8">19d6d039</a></strong>
<div>
<span> by sheaf </span> <i> at 2023-03-16T21:31:22+01:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>ghci: only keep the GlobalRdrEnv in ModInfo
The datatype GHC.UI.Info.ModInfo used to store a ModuleInfo,
which includes a TypeEnv. This can easily cause space leaks as we
have no way of forcing everything in a type environment.
In GHC, we only use the GlobalRdrEnv, which we can force completely.
So we only store that instead of a fully-fledged ModuleInfo.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/73d07c6e1986bd2b3516d4f009cc1e30ba804f06">73d07c6e</a></strong>
<div>
<span> by Torsten Schmits </span> <i> at 2023-03-17T14:36:49-04:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Add structured error messages for GHC.Tc.Utils.Backpack
Tracking ticket: #20119
MR: !10127
This converts uses of `mkTcRnUnknownMessage` to newly added constructors
of `TcRnMessage`.
One occurrence, when handing a nested error from the interface loading
machinery, was omitted. It will be handled by a subsequent changeset
that addresses interface errors.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b1d17df2da3483b8fee683b2994e7291156b0cc2">b1d17df2</a></strong>
<div>
<span> by Simon Peyton Jones </span> <i> at 2023-03-21T11:53:52+00:00 </i>
</div>
<pre class="commit-message" style='white-space: pre-wrap; display: block; font-size: 0.875rem; color: #333238; position: relative; font-family: var(--default-mono-font, "Menlo"),"DejaVu Sans Mono","Liberation Mono","Consolas","Ubuntu Mono","Courier New","andale mono","lucida console",monospace; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; border-radius: 2px; margin: 0; padding: 8px 12px; border: 1px solid #dcdcde;'>Be more careful about quantification
This MR is driven by #23051. It does several things:
* It is guided by the generalisation plan described in #20686.
But it is still far from a complete implementation of that plan.
* Add Note [Inferred type with escaping kind] to GHC.Tc.Gen.Bind.
This explains that we don't (yet, pending #20686) directly
prevent generalising over escaping kinds.
* In `GHC.Tc.Utils.TcMType.defaultTyVar` we default RuntimeRep
and Multiplicity variables, beause we don't want to quantify over
them. We want to do the same for a Concrete tyvar, but there is
nothing sensible to default it to (unless it has kind RuntimeRep,
in which case it'll be caught by an earlier case). So we promote
instead.
* Pure refactoring in GHC.Tc.Solver:
* Rename decideMonoTyVars to decidePromotedTyVars, since that's
what it does.
* Move the actual promotion of the tyvars-to-promote from
`defaultTyVarsAndSimplify` to `decidePromotedTyVars`. This is a
no-op; just tidies up the code. E.g then we don't need to
return the promoted tyvars from `decidePromotedTyVars`.
* A little refactoring in `defaultTyVarsAndSimplify`, but no
change in behaviour.
* When making a TauTv unification variable into a ConcreteTv
(in GHC.Tc.Utils.Concrete.makeTypeConcrete), preserve the occ-name
of the type variable. This just improves error messages.
* Kill off dead code: GHC.Tc.Utils.TcMType.newConcreteHole
</pre>
</li>
</ul>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
</h4>
<ul>
<li class="file-stats">
<a href="#d0d96a6d03668aeab20ebe05e2c4ccb798c7e64c">
compiler/GHC.hs
</a>
</li>
<li class="file-stats">
<a href="#0cfa18c0ec64f1546e30c0bd93e6607d52b81b26">
compiler/GHC/Driver/Config.hs
</a>
</li>
<li class="file-stats">
<a href="#5aa3321b0f5c08d7ebfa1a4a3340d4451258988b">
compiler/GHC/Linker/Loader.hs
</a>
</li>
<li class="file-stats">
<a href="#efe7444c09eed0fdaa83e6904e6328fb435620bf">
compiler/GHC/Runtime/Interpreter.hs
</a>
</li>
<li class="file-stats">
<a href="#1dd9c7a6bbc222c976a6ec1c4b772232ae60f7e5">
compiler/GHC/Tc/Errors/Ppr.hs
</a>
</li>
<li class="file-stats">
<a href="#cdba811872892f235fe7059df1a6c538fba60816">
compiler/GHC/Tc/Errors/Types.hs
</a>
</li>
<li class="file-stats">
<a href="#83f745d921da7adb739e81f83e1c07e723e4a789">
compiler/GHC/Tc/Gen/Bind.hs
</a>
</li>
<li class="file-stats">
<a href="#9355bef855426caf5f526925edf351b20f9a86c4">
compiler/GHC/Tc/Gen/HsType.hs
</a>
</li>
<li class="file-stats">
<a href="#54436e21ea530a66a8a71bcc01c836f4740b8f02">
compiler/GHC/Tc/Solver.hs
</a>
</li>
<li class="file-stats">
<a href="#3b6d78a50c8462304f843b952a88e531718dbbd2">
compiler/GHC/Tc/Types/Constraint.hs
</a>
</li>
<li class="file-stats">
<a href="#5d7c5ef0541bd4c1c950ecc95edf95171d20f538">
compiler/GHC/Tc/Utils/Backpack.hs
</a>
</li>
<li class="file-stats">
<a href="#286002f016636e4fbd86ac6bafaacea29ac4633d">
compiler/GHC/Tc/Utils/Concrete.hs
</a>
</li>
<li class="file-stats">
<a href="#94c96afe1bb3b771ffbcfeeca34ce43ebbe76ccb">
compiler/GHC/Tc/Utils/TcMType.hs
</a>
</li>
<li class="file-stats">
<a href="#1db07ed8cd9bab6b217a8f5a140176d3cb8672fd">
compiler/GHC/Tc/Validity.hs
</a>
</li>
<li class="file-stats">
<a href="#e2c828ee9e003df518a07b05beaa6971e5c62eb0">
compiler/GHC/Types/Error/Codes.hs
</a>
</li>
<li class="file-stats">
<a href="#f51fb4f2d4530c26e6a6c1b020973cfe35e0e619">
compiler/GHC/Types/Name/Shape.hs
</a>
</li>
<li class="file-stats">
<a href="#56cab10ba9d31c526f47a492a4151a878077dc2d">
docs/users_guide/9.8.1-notes.rst
</a>
</li>
<li class="file-stats">
<a href="#c30f4ac98f08779ad1bd5a02a27802862c1e9521">
ghc/GHCi/UI.hs
</a>
</li>
<li class="file-stats">
<a href="#0f814617086487f888918aa4c53eadb938e7a412">
ghc/GHCi/UI/Info.hs
</a>
</li>
<li class="file-stats">
<a href="#57d22eb49f269b51f07e23c509834d85e25f691e">
ghc/GHCi/UI/Monad.hs
</a>
</li>
<li class="file-stats">
<a href="#489672e1c73438c35814634b6e8c700bf75e1bad">
m4/fp_find_cxx_std_lib.m4
</a>
</li>
<li class="file-stats">
<a href="#e88da9fb01b1db2c3deb5122563b499a7b416c6e">
testsuite/tests/backpack/cabal/bkpcabal06/bkpcabal06.stderr
</a>
</li>
<li class="file-stats">
<a href="#62f311817aae3084e0796a075a4a5155de36835e">
testsuite/tests/backpack/should_fail/bkpfail01.stderr
</a>
</li>
<li class="file-stats">
<a href="#ac829bbce46164e63ab1d6b1503cb82e4891b737">
testsuite/tests/backpack/should_fail/bkpfail05.stderr
</a>
</li>
<li class="file-stats">
<a href="#1650a4284bdfba488bf9aa0ca866601468f91d8f">
testsuite/tests/backpack/should_fail/bkpfail09.stderr
</a>
</li>
<li class="file-stats">
<a href="#5e69908142d573291d25fe83f285f367a6619ef8">
testsuite/tests/backpack/should_fail/bkpfail16.stderr
</a>
</li>
<li class="file-stats">
<a href="#ba3208424d32a13fc32e67df4cb85f54ad81976a">
testsuite/tests/backpack/should_fail/bkpfail20.stderr
</a>
</li>
<li class="file-stats">
<a href="#e9910bb070d3a5a8a5207bd1fdbf770b2569c030">
testsuite/tests/backpack/should_fail/bkpfail21.stderr
</a>
</li>
<li class="file-stats">
<a href="#1fe506880c1d7eca85374e30838b2f0dc8f86d0c">
testsuite/tests/backpack/should_fail/bkpfail35.stderr
</a>
</li>
<li class="file-stats">
<a href="#4f29b4d33ea02032c8d0105488c85fa9ce638b2d">
testsuite/tests/backpack/should_fail/bkpfail37.stderr
</a>
</li>
</ul>
<h5 style="margin-top: 10px; margin-bottom: 10px; font-size: 0.875rem;">
The diff was not included because it is too large.
</h5>
</div>
<div class="footer" style="margin-top: 10px;">
<p style="font-size: small; color: #737278;">
—
<br>
<a href="https://gitlab.haskell.org/ghc/ghc/-/compare/4e06ba8b1168d7346090848433aff9311fb1a2f9...b1d17df2da3483b8fee683b2994e7291156b0cc2">View it on GitLab</a>.
<br>
You're receiving this email because of your account on <a target="_blank" rel="noopener noreferrer" href="https://gitlab.haskell.org">gitlab.haskell.org</a>. <a href="https://gitlab.haskell.org/-/profile/notifications" target="_blank" rel="noopener noreferrer" class="mng-notif-link">Manage all notifications</a> · <a href="https://gitlab.haskell.org/help" target="_blank" rel="noopener noreferrer" class="help-link">Help</a>
</p>
</div>
</body>
</html>