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<div style="direction: ltr;">Thank you so much Richard - it worked! And you are right, I had a `git add -u` at some point. This is what happens when I donít review my changes closely! I had no idea I made changes to libraries/Cabal and such. </div>
<div style="direction: ltr;"><br>
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<div style="direction: ltr;">Anyways, the diff is on Phab again, D5229. Hope to see feedback :)</div>
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<div style="direction: ltr;">My</div>
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<div id="divRplyFwdMsg" dir="dir="ltr""><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Richard Eisenberg <rae@cs.brynmawr.edu><br>
<b>Sent:</b> Monday, December 3, 2018 9:35 PM<br>
<b>To:</b> My Nguyen<br>
<b>Cc:</b> Krzysztof Gogolewski; ghc-devs@haskell.org<br>
<b>Subject:</b> Re: Cabal not updated after rebase?
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Detached HEADs are normal with submodules. (I suppose sentences like that would have gotten me executed several centuries ago...)
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</div>
<div class="">When I look at <a href="https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Fmynguyenbmc%2Fghc%2Fcompare%2F93a3f9070d5d69ad6a28fe94ccccd20c54609698...wip%2Fkind-app&data=02%7C01%7Cmnguyen1%40brynmawr.edu%7C9b02a840652a46e8c29708d6599114f5%7Cc94b117b616347fd93f8b8001804ae6f%7C1%7C0%7C636794877000045765&sdata=Vz4oh8OjXrVyWAnIBO85kXvSwx5eB8xRy1Gig0xKnq0%3D&reserved=0" originalsrc="https://github.com/mynguyenbmc/ghc/compare/93a3f9070d5d69ad6a28fe94ccccd20c54609698...wip/kind-app" shash="dkaU3SXZcr8TRAlxtSxM7lhWd4OwCoWcs6luXHBRuzuqMV7ykl1ghL2Z65sRds+2pmX/VpyWUMIXaxmateK2JsjRg9agbmbMHDyzZtzGRTA6MJFHUiYY40lPaVkYlc8UDuInadNSnAXboss0oyXk0ZMcPucyF/jKDQsxR1R7cqs=" class="">https://github.com/mynguyenbmc/ghc/compare/93a3f9070d5d69ad6a28fe94ccccd20c54609698...wip/kind-app</a>,
 which is, I believe, the difference between GHC HEAD and your branch, I see that the Cabal submodule has changed. I imagine you didn't mean to do this. (This has happened to me with an ill-timed `git add -u` while rebasing. Perhaps that's what caused the trouble
 for you, too.)</div>
<div class=""><br class="">
</div>
<div class="">To fix, you can manually `git checkout abcdefabcdef` each erroneously changed submodule to point to the right commit from HEAD. Then, `git add` each submodule in the ghc repo (i.e. not inside any submodule) and try again.</div>
<div class=""><br class="">
</div>
<div class="">I hope this helps!</div>
<div class="">Richard<br class="">
<div class="">
<div><br class="">
<blockquote type="cite" class="">
<div class="">On Dec 3, 2018, at 6:27 PM, My Nguyen <<a href="mailto:mnguyen1@brynmawr.edu" class="">mnguyen1@brynmawr.edu</a>> wrote:</div>
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<div class="" style="color:rgb(51,51,51); font-size:12px; font-style:normal; font-variant-caps:normal; font-weight:normal; letter-spacing:normal; orphans:auto; text-align:start; text-indent:0px; text-transform:none; white-space:normal; widows:auto; word-spacing:0px; text-decoration:none; direction:ltr">
<div class="" style="direction:ltr">I did not touch Cabal at all, but somehow `git status` in libraries/Cabal is telling me thereís a detached HEAD?</div>
<div class="" style="direction:ltr"><br class="">
</div>
<div class="" style="direction:ltr">I built GHC with a fresh checkout from github, and it worked. But after applying my patch, it doesnít work anymore. </div>
</div>
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<div id="divRplyFwdMsg" dir="dir="ltr"" class=""><font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="Apple-converted-space"> </span>Richard Eisenberg <<a href="mailto:rae@cs.brynmawr.edu" class="">rae@cs.brynmawr.edu</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Monday, December 3, 2018 8:26 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>My Nguyen<br class="">
<b class="">Cc:</b><span class="Apple-converted-space"> </span>Krzysztof Gogolewski;
<a href="mailto:ghc-devs@haskell.org" class="">ghc-devs@haskell.org</a><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: Cabal not updated after rebase?
<div class=""> </div>
</font></div>
Did you change the Cabal submodule at all in your work? Maybe it's out of sync somehow...
<div class=""><br class="">
</div>
<div class="">What happens if you build GHC without including your changes? Does it work?<br class="">
<div class=""><br class="">
<blockquote type="cite" class="">
<div class="">On Dec 3, 2018, at 12:13 PM, My Nguyen <<a href="mailto:mnguyen1@brynmawr.edu" class="">mnguyen1@brynmawr.edu</a>> wrote:</div>
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<div class="">
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<div class="" style="direction:ltr">Hello,</div>
<div class="" style="direction:ltr"><br class="">
</div>
<div class="" style="direction:ltr">Thanks for the suggestion. Unfortunately, the problem persists :(! </div>
<div class="" style="direction:ltr"><br class="">
</div>
<div class="" style="direction:ltr">My </div>
</div>
<div class=""> </div>
<hr tabindex="-1" class="" style="display:inline-block; width:736.953125px">
<div id="divRplyFwdMsg" dir="dir="ltr"" class=""><font face="Calibri, sans-serif" class="" style="font-size:11pt"><b class="">From:</b><span class="Apple-converted-space"> </span>Krzysztof Gogolewski <<a href="mailto:krz.gogolewski@gmail.com" class="">krz.gogolewski@gmail.com</a>><br class="">
<b class="">Sent:</b><span class="Apple-converted-space"> </span>Monday, December 3, 2018 2:46 PM<br class="">
<b class="">To:</b><span class="Apple-converted-space"> </span>My Nguyen<br class="">
<b class="">Cc:</b><span class="Apple-converted-space"> </span><a href="mailto:ghc-devs@haskell.org" class="">ghc-devs@haskell.org</a><br class="">
<b class="">Subject:</b><span class="Apple-converted-space"> </span>Re: Cabal not updated after rebase?
<div class=""> </div>
</font></div>
<div dir="ltr" class="">
<div dir="ltr" class="">Hi,<br class="">
<br class="">
Does `git clean -fdx .` in libraries/Cabal help? git clean doesn't go into submodules.<br class="">
<br class="">
-Krzysztof<br class="">
</div>
</div>
<br class="">
<div class="gmail_quote">
<div dir="ltr" class="">On Mon, Dec 3, 2018 at 6:09 PM My Nguyen <<a href="mailto:mnguyen1@brynmawr.edu" target="_blank" class="">mnguyen1@brynmawr.edu</a>> wrote:<br class="">
</div>
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<div class=""><span class="" style="font-family:Calibri,Helvetica,sans-serif; font-size:12pt">Hi all,</span></div>
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<div id="m_4072115928933759355m_8863188587282715971divtagdefaultwrapper" dir="ltr" class="" style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif">
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<div class="" style="margin-top:0px; margin-bottom:0px">I've finished quite a big rebase and was trying to rebuild, but it failed with:</div>
<p class="" style="margin-top:0px; margin-bottom:0px"></p>
<blockquote type="cite" class="" style="color:rgb(33,33,33); font-family:wf_segoe-ui_normal,"Segoe UI","Segoe WP",Tahoma,Arial,sans-serif,serif,EmojiFont; font-size:15px">
<div class="" style="color:rgb(51,51,51); font-size:12px">
<blockquote type="cite" class="">
<div dir="ltr" id="m_4072115928933759355m_8863188587282715971x_divtagdefaultwrapper" class="" style="font-size:12pt; font-family:Calibri,Helvetica,sans-serif,serif,EmojiFont">
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<span class="" style="font-variant-ligatures:no-common-ligatures">ghc-cabal: Encountered missing dependencies:</span></div>
<div class="" style="font-size:11px; font-family:Menlo,serif,EmojiFont; margin:0px; line-height:normal; font-stretch:normal">
<span class="" style="font-variant-ligatures:no-common-ligatures">Cabal ==2.5.*</span></div>
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</blockquote>
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</blockquote>
I then tried applying my patch on a fresh checkout of GHC and found the reason:
<div class=""><br class="">
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</div>
<p class="" style="margin-top:0px; margin-bottom:0px"></p>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:119:1:</b></span><span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(195,55,32)"><b class="">error:</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Binary.hi</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">       </span>Something is amiss; requested module<span class="m_4072115928933759355m_8863188587282715971Apple-converted-space"> <span class="Apple-converted-space"> </span></span>Cabal-2.4.0.1:Distribution.Compat.Binary
 differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Binary (if these names look the same, try again with -dppr-debug)</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(82,48,225); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class="">119 |</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">import
 Distribution.Compat.Binary<span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>(Binary (..))</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="Apple-converted-space"> </span>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255); min-height:13px">
<span class="" style="font-variant-ligatures:no-common-ligatures"></span><br class="">
</div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:120:1:</b></span><span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(195,55,32)"><b class="">error:</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Semigroup.hi</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">       </span>Something is amiss; requested module<span class="m_4072115928933759355m_8863188587282715971Apple-converted-space"> <span class="Apple-converted-space"> </span></span>Cabal-2.4.0.1:Distribution.Compat.Semigroup
 differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Semigroup (if these names look the same, try again with -dppr-debug)</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(82,48,225); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class="">120 |</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">import
 Distribution.Compat.Semigroup (Semigroup (..), gmappend, gmempty)</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="Apple-converted-space"> </span>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255); min-height:13px">
<span class="" style="font-variant-ligatures:no-common-ligatures"></span><br class="">
</div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">libraries/Cabal/Cabal/Distribution/Compat/Prelude.hs:141:1:</b></span><span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(195,55,32)"><b class="">error:</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>Bad interface file: libraries/Cabal/Cabal/dist-boot/build/Distribution/Compat/Stack.hi</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">       </span>Something is amiss; requested module<span class="m_4072115928933759355m_8863188587282715971Apple-converted-space"> <span class="Apple-converted-space"> </span></span>Cabal-2.4.0.1:Distribution.Compat.Stack
 differs from name found in the interface file Cabal-2.5.0.0:Distribution.Compat.Stack (if these names look the same, try again with -dppr-debug)</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(82,48,225); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class="">141 |</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class="">import
 Distribution.Compat.Stack</b></span></div>
<div class="" style="margin:0px; font-style:normal; font-variant-caps:normal; font-weight:normal; font-stretch:normal; font-size:11px; line-height:normal; font-family:Menlo; color:rgb(195,55,32); background-color:rgb(255,255,255)">
<span class="" style="font-variant-ligatures:no-common-ligatures; color:rgb(82,48,225)"><b class=""><span class="m_4072115928933759355m_8863188587282715971Apple-converted-space">   </span>|</b></span><span class="" style="font-variant-ligatures:no-common-ligatures"><b class=""><span class="Apple-converted-space"> </span>^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^</b></span></div>
<div class=""><br class="webkit-block-placeholder">
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<div class="" style="margin-top:0px; margin-bottom:0px"><br class="">
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<div class="" style="margin-top:0px; margin-bottom:0px">I'm sure I did `git module update`; I even `git clean` everything and  `make` from fresh but somehow the cabal still isn't updated. Can anyone help me on why this is happening and how to fix it?</div>
<div class="" style="margin-top:0px; margin-bottom:0px"><br class="">
</div>
<div class="" style="margin-top:0px; margin-bottom:0px">Thanks so much,</div>
<div class="" style="margin-top:0px; margin-bottom:0px">My</div>
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