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To: samad@microsoft.com
Subject: Re: "Couldn't compute FAST_CWD pointer" 
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Date: Fri, 16 Jun 2023 21:09:04 +0200 (CEST)
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From: cygwinautoreply--- via Cygwin <cygwin@cygwin.com>
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Sender: "Cygwin" <cygwin-bounces+archive-cygwin=delorie.com@cygwin.com>

>I started seeing this error with more recent builds of Windows, so I went to the Cygwin site and ran the latest installer to get the most recent binaries.  I've had to do this periodically in the past 15 years, and fresh binaries have resolved my issues in the past.  This time, the error persisted.  A quick search seems to point to different versions of GCC used to compile Cygwin might have compatibility issues with different versions of Windows.  I'd like to help get this resolved if I can.

>Thanks,
>Sam

>Error:
>g:\os2\src\onecore\base\devices\association>ls
>Cygwin WARNING:
>  Couldn't compute FAST_CWD pointer.  This typically occurs if you're using
>  an older Cygwin version on a newer Windows.  Please update to the latest
>  available Cygwin version from https://cygwin.com/.  If the problem persists,
>  please see https://cygwin.com/problems.html

>Mbs                        SourcesCop_nonfatal.err       buildchk.metadata    buildfre.exec.json   client     samples

>So, I have a recent build of Windows.  It seems like this issue popped up like a week or two ago, so it probably started 5-10 build numbers ago.
>0:000> vertarget
>Windows 10 Version 25888 MP (28 procs) Free x64
>Product: WinNt, suite: SingleUserTS
>Edition build lab: 25888.1000.amd64fre.rs_dplat.230614-1400
>Build layer: DesktopEditions -> 25888.1000.amd64fre.rs_dplat.230614-1400
>Build layer: OnecoreUAP -> 25888.1000.amd64fre.rs_dplat.230614-1400
>Build layer: ShellCommon -> 25888.1000.amd64fre.rs_dplat.230614-1400
>Build layer: OSClient   -> 25888.1000.amd64fre.rs_dplat.230614-1400
>Debug session time: Fri Jun 16 12:02:33.676 2023 (UTC - 7:00)
>System Uptime: 0 days 8:43:16.926
>Process Uptime: 0 days 0:13:15.247
>  Kernel time: 0 days 0:00:00.015
>  User time: 0 days 0:00:00.000

>This is after I got the most recent version of Cygwin from the installer, it looks like version 3.4.6 built on Feb 14 2023.


>0:000> lmDvmcygwin1

>Browse full module list

>start             end                 module name

>00007ff9`03810000 00007ff9`03b12000   cygwin1    (deferred)

>    Image path: g:\bin\cygwin1.dll

>    Image name: cygwin1.dll

>    Browse all global symbols  functions  data

>    Timestamp:        Tue Feb 14 05:25:13 2023 (63EB8BB9)

>    CheckSum:         002D984A

>    ImageSize:        00302000

>    File version:     3003.3.0.0

>    Product version:  3003.3.0.0

>    File flags:       0 (Mask 3F)

>    File OS:          4 Unknown Win32

>    File type:        2.0 Dll

>    File date:        00000000.00000000

>    Translations:     0409.04b0

>    Information from resource tables:

>        CompanyName:      Red Hat

>        ProductName:      Cygwin

>        InternalName:     cygwin1.dll

>        OriginalFilename: cygwin1.dll

>        ProductVersion:   3.4.6

>        FileVersion:      3.4.6

>        FileDescription:  Cygwin POSIX Emulation DLL

>        LegalCopyright:   Copyright (c) Cygwin Authors 1996-2023


https://cygwin.com/faq.html#faq.using.fixing-find_fast_cwd-warnings

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