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<h3>
 Marge Bot pushed to branch master
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/95bccdd034ce4dd2d1bc36db9f1ba5e172550249">95bccdd0</a></strong>
<div>
<span>by Ben Gamari</span>
<i>at 2020-03-31T10:56:19-04:00</i>
</div>
<pre class="commit-message" style="white-space: pre-wrap; margin: 0;">base: Ensure that encoding global variables aren't inlined

As noted in #17970, these (e.g. `getFileSystemEncoding` and
`setFileSystemEncoding`) previously had unfoldings, which would
break their global-ness.

While not strictly necessary, I also add a NOINLINE on
`initLocaleEncoding` since it is used in `System.IO`, ensuring that we
only system's query the locale encoding once.

Fixes #17970.
</pre>
</li>
</ul>
<h4>1 changed file:</h4>
<ul>
<li class="file-stats">
<a href="#fe3abd3dded349c85c7aa5f1d6b3872ef710e098">
libraries/base/GHC/IO/Encoding.hs
</a>
</li>
</ul>
<h4>Changes:</h4>
<li id="fe3abd3dded349c85c7aa5f1d6b3872ef710e098">
<a href="https://gitlab.haskell.org/ghc/ghc/-/commit/95bccdd034ce4dd2d1bc36db9f1ba5e172550249#fe3abd3dded349c85c7aa5f1d6b3872ef710e098"><strong>libraries/base/GHC/IO/Encoding.hs</strong></a>
<hr>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -107,6 +107,7 @@ utf32be = UTF32.utf32be</td>
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<td class="diff-line-num old_line" data-linenumber="107" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC107" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="108" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="line_content" style="padding-left: 0.5em; padding-right: 0.5em;">
<pre style="margin: 0;"> <span id="LC108" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @since 4.5.0.0</span></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="109" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC109" class="line" lang="haskell"><span class="n" style="color: #333;">getLocaleEncoding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">TextEncoding</span></span>
</pre>
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<td class="diff-line-num new old_line" data-linenumber="110" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
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<pre style="margin: 0;">+<span id="LC110" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE getLocaleEncoding #-}</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC111" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="111" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="112" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC112" class="line" lang="haskell"><span class="cd">-- | The Unicode encoding of the current locale, but allowing arbitrary</span></span>
</pre>
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<td class="diff-line-num new_line" data-linenumber="113" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC113" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- undecodable bytes to be round-tripped through it.</span></span>
</pre>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="120" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="121" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -120,6 +121,7 @@ getLocaleEncoding :: IO TextEncoding</td>
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<pre style="margin: 0;"> <span id="LC121" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC122" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @since 4.5.0.0</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC123" class="line" lang="haskell"><span class="n" style="color: #333;">getFileSystemEncoding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">TextEncoding</span></span>
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<td class="diff-line-num new old_line" data-linenumber="123" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #c7f0d2; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#ddfbe6">
 
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<pre style="margin: 0;">+<span id="LC124" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE getFileSystemEncoding #-}</span></span>
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<pre style="margin: 0;"> <span id="LC125" class="line" lang="haskell"></span>
</pre>
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<td class="diff-line-num old_line" data-linenumber="124" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<td class="diff-line-num new_line" data-linenumber="126" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC126" class="line" lang="haskell"><span class="cd">-- | The Unicode encoding of the current locale, but where undecodable</span></span>
</pre>
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<td class="diff-line-num new_line" data-linenumber="127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC127" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- bytes are replaced with their closest visual match. Used for</span></span>
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<td class="diff-line-num unfold js-unfold old_line" data-linenumber="127" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="diff-line-num unfold js-unfold new_line" data-linenumber="129" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -127,9 +129,13 @@ getFileSystemEncoding :: IO TextEncoding</td>
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<pre style="margin: 0;"> <span id="LC129" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">--</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC130" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- @since 4.5.0.0</span></span>
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<pre style="margin: 0;"> <span id="LC131" class="line" lang="haskell"><span class="n" style="color: #333;">getForeignEncoding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="kt" style="color: #458; font-weight: 600;">TextEncoding</span></span>
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<pre style="margin: 0;">+<span id="LC132" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE getForeignEncoding #-}</span></span>
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<pre style="margin: 0;"> <span id="LC133" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC134" class="line" lang="haskell"><span class="cd">-- | @since 4.5.0.0</span></span>
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<pre style="margin: 0;"> <span id="LC135" class="line" lang="haskell"><span class="n" style="color: #333;">setLocaleEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">setFileSystemEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">setForeignEncoding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TextEncoding</span> <span class="o" style="font-weight: 600;">-></span> <span class="kt" style="color: #458; font-weight: 600;">IO</span> <span class="nb" style="color: #0086b3;">()</span></span>
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<pre style="margin: 0;">+<span id="LC136" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE setLocaleEncoding #-}</span></span>
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<pre style="margin: 0;">+<span id="LC137" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE setFileSystemEncoding #-}</span></span>
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<pre style="margin: 0;">+<span id="LC138" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE setForeignEncoding #-}</span></span>
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<pre style="margin: 0;"> <span id="LC139" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC140" class="line" lang="haskell"><span class="p">(</span><span class="n" style="color: #333;">getLocaleEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">setLocaleEncoding</span><span class="p">)</span>         <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkGlobal</span> <span class="n" style="color: #333;">initLocaleEncoding</span></span>
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<td class="diff-line-num new_line" data-linenumber="141" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">
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<pre style="margin: 0;"> <span id="LC141" class="line" lang="haskell"><span class="p">(</span><span class="n" style="color: #333;">getFileSystemEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">setFileSystemEncoding</span><span class="p">)</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">mkGlobal</span> <span class="n" style="color: #333;">initFileSystemEncoding</span></span>
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<td class="diff-line-num unfold js-unfold new_line" data-linenumber="145" style="width: 35px; color: rgba(0,0,0,0.3); border-right-width: 1px; border-right-color: #f0f0f0; border-right-style: solid; padding: 0 5px;" align="right" bgcolor="#fafafa">...</td>
<td class="line_content match " style="padding-left: 0.5em; padding-right: 0.5em; color: rgba(0,0,0,0.3);" bgcolor="#fafafa">@@ -139,9 +145,13 @@ mkGlobal :: a -> (IO a, a -> IO ())</td>
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<pre style="margin: 0;"> <span id="LC145" class="line" lang="haskell"><span class="n" style="color: #333;">mkGlobal</span> <span class="n" style="color: #333;">x</span> <span class="o" style="font-weight: 600;">=</span> <span class="n" style="color: #333;">unsafePerformIO</span> <span class="o" style="font-weight: 600;">$</span> <span class="kr" style="font-weight: 600;">do</span></span>
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<pre style="margin: 0;"> <span id="LC146" class="line" lang="haskell">    <span class="n" style="color: #333;">x_ref</span> <span class="o" style="font-weight: 600;"><-</span> <span class="n" style="color: #333;">newIORef</span> <span class="n" style="color: #333;">x</span></span>
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<pre style="margin: 0;"> <span id="LC147" class="line" lang="haskell">    <span class="n" style="color: #333;">return</span> <span class="p">(</span><span class="n" style="color: #333;">readIORef</span> <span class="n" style="color: #333;">x_ref</span><span class="p">,</span> <span class="n" style="color: #333;">writeIORef</span> <span class="n" style="color: #333;">x_ref</span><span class="p">)</span></span>
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<pre style="margin: 0;">+<span id="LC148" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE mkGlobal #-}</span></span>
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<pre style="margin: 0;"> <span id="LC149" class="line" lang="haskell"></span>
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<pre style="margin: 0;"> <span id="LC150" class="line" lang="haskell"><span class="cd">-- | @since 4.5.0.0</span></span>
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<pre style="margin: 0;"> <span id="LC151" class="line" lang="haskell"><span class="n" style="color: #333;">initLocaleEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">initFileSystemEncoding</span><span class="p">,</span> <span class="n" style="color: #333;">initForeignEncoding</span> <span class="o" style="font-weight: 600;">::</span> <span class="kt" style="color: #458; font-weight: 600;">TextEncoding</span></span>
</pre>
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<pre style="margin: 0;">+<span id="LC152" class="line" lang="haskell"><span class="cp" style="color: #999; font-weight: 600;">{-# NOINLINE initLocaleEncoding #-}</span></span>
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<pre style="margin: 0;">+<span id="LC153" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- N.B. initLocaleEncoding is exported for use in System.IO.localeEncoding.</span></span>
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<pre style="margin: 0;">+<span id="LC154" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- NOINLINE ensures that this result is shared.</span></span>
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155
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<pre style="margin: 0;"> <span id="LC155" class="line" lang="haskell"></span>
</pre>
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156
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<pre style="margin: 0;"> <span id="LC156" class="line" lang="haskell"><span class="o" style="font-weight: 600;">#</span><span class="kr" style="font-weight: 600;">if</span> <span class="o" style="font-weight: 600;">!</span><span class="n" style="color: #333;">defined</span><span class="p">(</span><span class="n" style="color: #333;">mingw32_HOST_OS</span><span class="p">)</span></span>
</pre>
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<pre style="margin: 0;"> <span id="LC157" class="line" lang="haskell"><span class="c1" style="color: #998; font-style: italic;">-- It is rather important that we don't just call Iconv.mkIconvEncoding here</span></span>
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