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<h3 style="margin-top: 20px; margin-bottom: 10px;">
Matthew Pickering pushed to branch wip/t22884 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/d442ac053f9ac7dbcc32318802daf686f377fe3d">d442ac05</a></strong>
<div>
<span> by Sylvain Henry </span> <i> at 2023-04-19T20:04:35-04:00 </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;'>JS: fix thread-related primops
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7a96f90b20e9ea55bb305b20c73473ba75834f78">7a96f90b</a></strong>
<div>
<span> by Bryan Richter </span> <i> at 2023-04-19T20:05:11-04:00 </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;'>CI: Disable abi-test-nightly
See #23269
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ab6c1d295cd9f492838dbd481ecc2a66bbd17393">ab6c1d29</a></strong>
<div>
<span> by Sylvain Henry </span> <i> at 2023-04-19T20:05:50-04:00 </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;'>Testsuite: don't use obsolescent egrep (#22351)
Recent egrep displays the following message, breaking golden tests:
egrep: warning: egrep is obsolescent; using grep -E
Switch to using "grep -E" instead
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/f15b0ce530bece8b242941a446fd381614bdd3cf">f15b0ce5</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2023-04-20T11:01:06-04:00 </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;'>hadrian: Pass haddock file arguments in a response file
In !10119 CI was failing on windows because the command line was too
long. We can mitigate this by passing the file arguments to haddock in a
response file.
We can't easily pass all the arguments in a response file because the
`+RTS` arguments can't be placed in the response file.
Fixes #23273
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/7012ec2facc632fe4966916f797e4d1f612d7318">7012ec2f</a></strong>
<div>
<span> by tocic </span> <i> at 2023-04-20T11:01:42-04:00 </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 doc typo in GHC.Read.readList
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/5c8731244bc13a3d813d2a4d53b3188b28dc8355">5c873124</a></strong>
<div>
<span> by sheaf </span> <i> at 2023-04-20T18:33:34-04:00 </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;'>Implement -jsem: parallelism controlled by semaphores
See https://github.com/ghc-proposals/ghc-proposals/pull/540/ for a
complete description for the motivation for this feature.
The `-jsem` option allows a build tool to pass a semaphore to GHC which
GHC can use in order to control how much parallelism it requests.
GHC itself acts as a client in the GHC jobserver protocol.
```
GHC Jobserver Protocol
~~~~~~~~~~~~~~~~~~~~~~
This proposal introduces the GHC Jobserver Protocol. This protocol allows
a server to dynamically invoke many instances of a client process,
while restricting all of those instances to use no more than <n> capabilities.
This is achieved by coordination over a system semaphore (either a POSIX
semaphore [6]_ in the case of Linux and Darwin, or a Win32 semaphore [7]_
in the case of Windows platforms).
There are two kinds of participants in the GHC Jobserver protocol:
- The *jobserver* creates a system semaphore with a certain number of
available tokens.
Each time the jobserver wants to spawn a new jobclient subprocess, it **must**
first acquire a single token from the semaphore, before spawning
the subprocess. This token **must** be released once the subprocess terminates.
Once work is finished, the jobserver **must** destroy the semaphore it created.
- A *jobclient* is a subprocess spawned by the jobserver or another jobclient.
Each jobclient starts with one available token (its *implicit token*,
which was acquired by the parent which spawned it), and can request more
tokens through the Jobserver Protocol by waiting on the semaphore.
Each time a jobclient wants to spawn a new jobclient subprocess, it **must**
pass on a single token to the child jobclient. This token can either be the
jobclient's implicit token, or another token which the jobclient acquired
from the semaphore.
Each jobclient **must** release exactly as many tokens as it has acquired from
the semaphore (this does not include the implicit tokens).
```
Build tools such as cabal act as jobservers in the protocol and are
responsibile for correctly creating, cleaning up and managing the
semaphore.
Adds a new submodule (semaphore-compat) for managing and interacting
with semaphores in a cross-platform way.
Fixes #19349
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/52d3e9b4189440d26bad9c5a15f9420b67b1ca5b">52d3e9b4</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2023-04-20T18:34:11-04:00 </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;'>rts: Initialize Array# header in listThreads#
Previously the implementation of listThreads# failed to initialize the
header of the created array, leading to various nastiness.
Fixes #23071
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1db30fe1dd38dd8ffedfadf3845706fcde02933b">1db30fe1</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2023-04-20T18:34:11-04:00 </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;'>testsuite: Add test for #23071
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/dae514f9835f7fe8e6643f8759cc4d0b0af9a657">dae514f9</a></strong>
<div>
<span> by tocic </span> <i> at 2023-04-21T13:31:21-04:00 </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 doc typos in libraries/base/GHC
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/113e21d763678ea7e7666b708e6c2dba7e52382f">113e21d7</a></strong>
<div>
<span> by Sylvain Henry </span> <i> at 2023-04-21T13:32:01-04:00 </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;'>Testsuite: replace some js_broken/js_skip predicates with req_c
Using req_c is more precise.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/038bb03157cabf53bd08426cbd86a38486b9752d">038bb031</a></strong>
<div>
<span> by Krzysztof Gogolewski </span> <i> at 2023-04-21T18:03:04-04:00 </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;'>Minor doc fixes
- Add docs/index.html to .gitignore.
It is created by ./hadrian/build docs, and it was the only file
in Hadrian's templateRules not present in .gitignore.
- Mention that MultiWayIf supports non-boolean guards
- Remove documentation of optdll - removed in 2007, 763daed95
- Fix markdown syntax
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e826cdb213e9b900dfc8f604220d8f3538b98763">e826cdb2</a></strong>
<div>
<span> by amesgen </span> <i> at 2023-04-21T18:03:44-04:00 </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;'>User's guide: DeepSubsumption is implied by Haskell{98,2010}
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/499a1c202522d849d91300c92be5d5623a46d264">499a1c20</a></strong>
<div>
<span> by PHO </span> <i> at 2023-04-23T13:39:32-04:00 </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;'>Implement executablePath for Solaris and make getBaseDir less platform-dependent
Use base-4.17 executablePath when possible, and fall back on
getExecutablePath when it's not available. The sole reason why getBaseDir
had #ifdef's was apparently that getExecutablePath wasn't reliable, and we
could reduce the number of CPP conditionals by making use of
executablePath instead.
Also export executablePath on js_HOST_ARCH.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/97a6f7bc5e2408d99c3ecdef85b7cc66ff994de3">97a6f7bc</a></strong>
<div>
<span> by tocic </span> <i> at 2023-04-23T13:40:08-04:00 </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 doc typos in libraries/base
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/787c6e8c5b96c95ead6cc7c213d12c5983975084">787c6e8c</a></strong>
<div>
<span> by Ben Gamari </span> <i> at 2023-04-24T12:19:06-04:00 </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;'>testsuite/T20137: Avoid impl.-defined behavior
Previously we would cast pointers to uint64_t. However, implementations
are allowed to either zero- or sign-extend such casts. Instead cast to
uintptr_t to avoid this.
Fixes #23247.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/87095f6a283d95016f66f4a14a3da923c394877c">87095f6a</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-24T12:19:44-04:00 </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;'>rts: always build 64-bit atomic ops
This patch does a few things:
- Always build 64-bit atomic ops in rts/ghc-prim, even on 32-bit
platforms
- Remove legacy "64bit" cabal flag of rts package
- Fix hs_xchg64 function prototype for 32-bit platforms
- Fix AtomicFetch test for wasm32
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/2685a12d462573ce23ef7f4356a2f8c95ef63e1d">2685a12d</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-24T12:20:21-04:00 </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;'>compiler: don't install signal handlers when the host platform doesn't have signals
Previously, large parts of GHC API will transitively invoke
withSignalHandlers, which doesn't work on host platforms without
signal functionality at all (e.g. wasm32-wasi). By making
withSignalHandlers a no-op on those platforms, we can make more parts
of GHC API work out of the box when signals aren't supported.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1338b7a3354ed77f6add43c1d33b776db53e7036">1338b7a3</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-24T16:21:30-04:00 </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;'>hadrian: fix non-ghc program paths passed to testsuite driver when testing cross GHC
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/1a10f55657a4fc0391a726646552171d5bc7798f">1a10f556</a></strong>
<div>
<span> by Bodigrim </span> <i> at 2023-04-24T16:22:09-04:00 </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 since pragma to Data.Functor.unzip
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/0da9e88273a0ffb13132631fb5ea526ea9efeeb9">0da9e882</a></strong>
<div>
<span> by Soham Chowdhury </span> <i> at 2023-04-25T00:15:22-04:00 </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;'>More informative errors for bad imports (#21826)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ebd5b0781c6e6f4642db91353fab0f0ec04af3bc">ebd5b078</a></strong>
<div>
<span> by Josh Meredith </span> <i> at 2023-04-25T00:15:58-04:00 </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;'>JS/base: provide implementation for mkdir (issue 22374)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/8f656188e271fc55b31a50a1c2f3cf6ff9bbeeea">8f656188</a></strong>
<div>
<span> by Josh Meredith </span> <i> at 2023-04-25T18:12:38-04:00 </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;'>JS: Fix h$base_access implementation (issue 22576)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/74c557121fbcae32abd3b4a69513f8aa7d536073">74c55712</a></strong>
<div>
<span> by Andrei Borzenkov </span> <i> at 2023-04-25T18:13:19-04:00 </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;'>Give more guarntees about ImplicitParams (#23289)
- Added new section in the GHC user's guide that legends behavior of
nested implicit parameter bindings in these two cases:
let ?f = 1 in let ?f = 2 in ?f
and
data T where MkT :: (?f :: Int) => T
f :: T -> T -> Int
f MkT MkT = ?f
- Added new test case to examine this behavior.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/c30ac25f7dfaded58bb2ff85d4bffe662e4af8b1">c30ac25f</a></strong>
<div>
<span> by Sebastian Graf </span> <i> at 2023-04-26T14:50:51-04:00 </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;'>DmdAnal: Unleash demand signatures of free RULE and unfolding binders (#23208)
In #23208 we observed that the demand signature of a binder occuring in a RULE
wasn't unleashed, leading to a transitively used binder being discarded as
absent. The solution was to use the same code path that we already use for
handling exported bindings.
See the changes to `Note [Absence analysis for stable unfoldings and RULES]`
for more details.
I took the chance to factor out the old notion of a `PlusDmdArg` (a pair of a
`VarEnv Demand` and a `Divergence`) into `DmdEnv`, which fits nicely into our
existing framework. As a result, I had to touch quite a few places in the code.
This refactoring exposed a few small bugs around correct handling of bottoming
demand environments. As a result, some strictness signatures now mention uniques
that weren't there before which caused test output changes to T13143, T19969 and
T22112. But these tests compared whole -ddump-simpl listings which is a very
fragile thing to begin with. I changed what exactly they test for based on the
symptoms in the corresponding issues.
There is a single regression in T18894 because we are more conservative around
stable unfoldings now. Unfortunately it is not easily fixed; let's wait until
there is a concrete motivation before invest more time.
Fixes #23208.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/77f506b888624b4fd30205fb8512f39435055a27">77f506b8</a></strong>
<div>
<span> by Josh Meredith </span> <i> at 2023-04-26T14:51:28-04:00 </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;'>Refactor GenStgRhs to include the Type in both constructors (#23280, #22576, #22364)
Carry the actual type of an expression through the PreStgRhs and into GenStgRhs
for use in later stages. Currently this is used in the JavaScript backend to fix
some tests from the above mentioned issues: EtaExpandLevPoly, RepPolyWrappedVar2,
T13822, T14749.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/052e2bb629abc97b394b9de2394eb36cbed9385f">052e2bb6</a></strong>
<div>
<span> by Alan Zimmerman </span> <i> at 2023-04-26T14:52:05-04:00 </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;'>EPA: Use ExplicitBraces only in HsModule
!9018 brought in exact print annotations in LayoutInfo for open and
close braces at the top level.
But it retained them in the HsModule annotations too.
Remove the originals, so exact printing uses LayoutInfo
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/d5c4629b64cd30c5b443db3124f3b02283d122ca">d5c4629b</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>ci: update ci.sh to actually run the entire testsuite for wasm backend
For the time being, we still need to use in-tree mode and can't test
the bindist yet.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/533d075e722c020b690e81dad61168697c3eee84">533d075e</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>ci: additional wasm32 manual jobs in validate pipelines
This patch enables bignum native & unregisterised wasm32 jobs as
manual jobs in validate pipelines, which can be useful to prevent
breakage when working on wasm32 related patches.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b5f00811257670b2a9fc7904bc775f25fea3cf5b">b5f00811</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: fix cross prefix stripping
This patch fixes cross prefix stripping in the testsuite driver. The
normalization logic used to only handle prefixes of the triple form
<arch>-<vendor>-<os>, now it's relaxed to allow any number of tokens
in the prefix tuple, so the cross prefix stripping logic would work
when ghc is configured with something like --target=wasm32-wasi.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/6f511c36f9845a6e3731e658de4992bfd9806a52">6f511c36</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: include target exe extension in heap profile filenames
This patch fixes hp2ps related framework failures when testing the
wasm backend by including target exe extension in heap profile
filenames.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/e6416b10cc9ec0ce022f58b618cd18f83fb01b8d">e6416b10</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: exclude ghci ways if no rts linker is present
This patch implements logic to automatically exclude ghci ways when
there is no rts linker. It's way better than having to annotate
individual test cases.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/791cce64a3ea23fc0ad95fb7e7083a0ff0c35154">791cce64</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: fix permission bits in copy_files
When the testsuite driver copy files instead of symlinking them, it
should also copy the permission bits, otherwise there'll be permission
denied errors. Also, enforce file copying when testing wasm32, since
wasmtime doesn't handle host symlinks quite well
(https://github.com/bytecodealliance/wasmtime/issues/6227).
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/aa6afe8ab48b5fbe09d332a25ce6af4719c5cb44">aa6afe8a</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: add the req_ghc_with_threaded_rts predicate
This patch adds the req_ghc_with_threaded_rts predicate to the
testsuite to assert the platform has threaded RTS, and mark some tests
as req_ghc_with_threaded_rts. Also makes ghc_with_threaded_rts a
config field instead of a global variable.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/ce580426ce3052e3b3d2847d0312652ea9087994">ce580426</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: add the req_process predicate
This patch adds the req_process predicate to the testsuite to assert
the platform has a process model, also marking tests that involve
spawning processes as req_process. Also bumps hpc & process submodule.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/cb9336657ce885a6d7f8b4f3171fdf32f1e241b2">cb933665</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: add the req_host_target_ghc predicate
This patch adds the req_host_target_ghc predicate to the testsuite to
assert the ghc compiler being tested can compile both host/target
code. When testing cross GHCs this is not supported yet, but it may
change in the future.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b174a1101289f2287d9194a229314badcb72ca1f">b174a110</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: add missing annotations for some tests
This patch adds missing annotations (req_th, req_dynamic_lib_support,
req_rts_linker) to some tests. They were discovered when testing
wasm32, though it's better to be explicit about what features they
require, rather than simply adding when(arch('wasm32'), skip).
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/bd2bfdecc8040a9a70478cd8d646a34b5fa77c35">bd2bfdec</a></strong>
<div>
<span> by Cheng Shao </span> <i> at 2023-04-27T16:00:35-04:00 </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;'>testsuite: wasm32-specific fixes
This patch includes all wasm32-specific testsuite fixes.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/4eaf2c2a7682fa9933261f5eb25da9e2333c9608">4eaf2c2a</a></strong>
<div>
<span> by Josh Meredith </span> <i> at 2023-04-27T16:01:11-04:00 </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;'>JS: change GHC.JS.Transform.identsS/E/V to take a saturated IR (#23304)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/57277662989b97dbf5ddc034d6c41ce39ab674ab">57277662</a></strong>
<div>
<span> by sheaf </span> <i> at 2023-04-29T20:23:06+02:00 </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 the Unsatisfiable class
This commit implements GHC proposal #433, adding the Unsatisfiable
class to the GHC.TypeError module. This provides an alternative to
TypeError for which error reporting is more predictable: we report it
when we are reporting unsolved Wanted constraints.
Fixes #14983 #16249 #16906 #18310 #20835
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/00a8a5ff9abf5bb1a0c2a9225c7bca5ec3bdf306">00a8a5ff</a></strong>
<div>
<span> by Torsten Schmits </span> <i> at 2023-04-30T03:45:09-04:00 </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.Rename.Names
Tracking ticket: #20115
MR: !10336
This converts uses of `mkTcRnUnknownMessage` to newly added constructors
of `TcRnMessage`.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/704d0cf5983ea4498cbfb9028b3f888803e6750a">704d0cf5</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2023-05-03T09:35:28+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;'>Introduce GHCiMessage to wrap GhcMessage
By introducing a wrapped message type we can control how certain
messages are printed in GHCi (to add extra information for example)
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/829ef895f14b0505e72b154a30f9c68e5120d3de">829ef895</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2023-05-03T09:35:28+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;'>Abstract cantFindError and turn Opt_BuildingCabal into a print-time option
* cantFindError is abstracted so that the parts which mention specific
things about ghc/ghci are parameters. The intention being that
GHC/GHCi can specify the right values to put here but otherwise
display the same error message.
* The BuildingCabalPackage argument from GenericMissing is removed and
turned into a print-time option. The reason for the error is not
dependent on whether `-fbuilding-cabal-package` is passed, so we don't
want to store that in the error message.
</pre>
</li>
<li>
<strong style="font-weight: bold;"><a href="https://gitlab.haskell.org/ghc/ghc/-/commit/b730538390c7bec8d286b965394fd3b69d4dc606">b7305383</a></strong>
<div>
<span> by Matthew Pickering </span> <i> at 2023-05-03T09:40:32+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;'>error messages: Don't display ghci specific hints for missing packages
I am unsure about whether the approach taken here is the best of most
maintainable solution. I put it up here for review and comment.
Fixes #22884
</pre>
</li>
</ul>
<h4 style="margin-top: 10px; margin-bottom: 10px;">
30 changed files:
</h4>
<ul>
<li class="file-stats">
<a href="#a5cc2925ca8258af241be7e5b0381edf30266302">
.gitignore
</a>
</li>
<li class="file-stats">
<a href="#587d266bb27a4dc3022bbed44dfa19849df3044c">
.gitlab-ci.yml
</a>
</li>
<li class="file-stats">
<a href="#157f7634c25bc6366cb7c9c9edb48e819dce38db">
.gitlab/ci.sh
</a>
</li>
<li class="file-stats">
<a href="#a6883fe5ffe69ebc49b16c7e553faba405221f57">
.gitlab/gen_ci.hs
</a>
</li>
<li class="file-stats">
<a href="#4f7fc727dfc06c2591e6043f44b9602eddfc3673">
.gitlab/jobs.yaml
</a>
</li>
<li class="file-stats">
<a href="#7445606fbf8f3683cd42bdc54b05d7a0bc2dfc44">
.gitmodules
</a>
</li>
<li class="file-stats">
<a href="#9efbf71c6a8cbe438e284b3e14d0309bef31d433">
cabal.project-reinstall
</a>
</li>
<li class="file-stats">
<a href="#0887cf39c5cdf9cf8d6758f410d7dab3023c0d77">
compiler/GHC/Builtin/Names.hs
</a>
</li>
<li class="file-stats">
<a href="#377cfd14c1f92357465df995ec6537b074051322">
compiler/GHC/Builtin/Types.hs
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compiler/GHC/ByteCode/Instr.hs
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compiler/GHC/Core/Type.hs
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compiler/GHC/CoreToStg.hs
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compiler/GHC/CoreToStg/Prep.hs
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compiler/GHC/Data/Bag.hs
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compiler/GHC/Driver/Config/Diagnostic.hs
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compiler/GHC/Driver/Pipeline/LogQueue.hs
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compiler/GHC/Driver/Session.hs
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compiler/GHC/Hs.hs
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compiler/GHC/Iface/Errors.hs
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compiler/GHC/Iface/Errors/Ppr.hs
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compiler/GHC/Iface/Errors/Types.hs
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compiler/GHC/JS/Transform.hs
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compiler/GHC/Parser.y
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compiler/GHC/Rename/Names.hs
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compiler/GHC/Rename/Unbound.hs
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