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Date:	Tue, 10 Aug 2021 14:07:52 +0900
To:	cygwin AT cygwin DOT com
Subject:	Re: many cygwin shells/tools (tcsh, fish, bash, and zsh) crashing
	STATUS_ACCESS_VIOLATION
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From:	Takashi Yano via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>
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On Mon, 9 Aug 2021 21:36:15 -0700
David Dyck wrote:
> I'm having trouble getting cygwin bash to start up - I tried older
> versions of bash, and I see that other tools are crashing also.  I'm
> looking for ideas on how to collect the useful information to begin
> the path to getting operation of cygwin restored.
> 
> I've had it running for many years, but recently upgraded to windows 10
> c:\cygwin64\bin>ver
> 
> Microsoft Windows [Version 10.0.22000.120]

This does not seem to be a version number of Windows10 but
a version number of latest Windows11 insider preview.

However, in my environment, cygwin works as expected in
Windows11 insider prevew as well as Windows10.

> seems like this computer ran cygwin bash probably in May of 2021.
> 
> To test cygwin tools I was able to add my cygwin bin directory to the path
> 
> c:\cygwin64\bin>path c:\cygwin64\bin;%PATH%
> 
> though normally I start cygwin with
>   C:\cygwin64\bin\mintty.exe -i /Cygwin-Terminal.ico -
> 
> 
> c:\cygwin64\bin>tcsh
>       0 [main] -csh 543 cygwin_exception::open_stackdumpfile: Dumping
> stack trace to tcsh.exe.stackdump
> 
> c:\cygwin64\bin>fish
>       0 [main] fish 73 cygwin_exception::open_stackdumpfile: Dumping
> stack trace to fish.exe.stackdump
> 
> c:\cygwin64\bin>bash
>       0 [main] bash 566 cygwin_exception::open_stackdumpfile: Dumping
> stack trace to bash.exe.stackdump
> 
> c:\cygwin64\bin>zsh
>       0 [main] zsh 1146 cygwin_exception::open_stackdumpfile: Dumping
> stack trace to zsh.exe.stackdump
> 
> # some shells start up
> 
> c:\cygwin64\bin>ash
> $ exit
> 
> c:\cygwin64\bin>dash
> $ exit
> 
> # even less crashes
> 
> 
> 
> c:\cygwin64\bin>.\date | less
>       1 [main] less 1907 cygwin_exception::open_stackdumpfile: Dumping
> stack trace to less.exe.stackdump
> 
> ---
> on the other hand, many programs can give their initial help
> 
> c:\cygwin64\bin>bash --version
> GNU bash, version 4.4.12(3)-release (x86_64-unknown-cygwin)
> Copyright (C) 2016 Free Software Foundation, Inc.
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
> 
> This is free software; you are free to change and redistribute it.
> There is NO WARRANTY, to the extent permitted by law.
> 
> here is a sample stackdump
> 
> $ wc -l *.stackdump
>    25 bash.exe.stackdump
>     9 fish.exe.stackdump
>     9 infocmp.exe.stackdump
>    18 less.exe.stackdump
>     9 more.exe.stackdump
>    28 python2.7.exe.stackdump
>    25 sh.exe.stackdump
>    33 tcsh.exe.stackdump
>    22 zsh.exe.stackdump
>   178 total
> $ dash
> $ date | more
> Segmentation fault (core dumped)
> $ cat more.exe.stackdump
> Exception: STATUS_ACCESS_VIOLATION at rip=003E07E8A37
> rax=00000003EFB1A170 rbx=0000000000000001 rcx=000000018037C76D
> rdx=0000000000000001 rsi=000000018037C76D rdi=00000000FFFFC514
> r8 =00000000FFFFC514 r9 =0000000000000000 r10=000000000000004D
> r11=00000001004053BE r12=0000000000000000 r13=00000000FFFFCDF0
> r14=0000000000000000 r15=0000000000000000
> rbp=0000000000000001 rsp=00000000FFFFC448
> program=C:\cygwin64\bin\more.exe, pid 145, thread main
> cs=0033 ds=002B es=002B fs=0053 gs=002B ss=002B


-- 
Takashi Yano <takashi DOT yano AT nifty DOT ne DOT jp>

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