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Postinstall Script Errors With Exit Code 128

I am attempting to install Cygwin, and am getting errors near the end of 
the process. I am using version 2.774 of setup.exe on Microsoft Windows 
Server 2003 R2 Datacenter x64 Edition Service Pack 2 and the default 
Cygwin packages. This is an Amazon AWS EC2 instance, and I am remote 
desktopping in. In the Cygwin Setup GUI, after it goes through the install 
procedure, I get a window titled Postinstall script errors, with the below 
output text:

Package: base-cygwin exit code 128
Package: terminfo exit code 128
Package: bash exit code 128
Package: coreutils exit code 128
Package: _autorebase
        autorebase.bat exit code -1073741819
Package: base-files exit code 2816 exit code 128
Package: cygutils exit code 127
Package: man exit code 128

If I then open Cygwin Terminal using the Desktop shortcut, I get a window 
titled "-sh" and a prompt that says "-sh-4.1$". The command "ls" returns 
"-sh: ls: command not found", but echo works. I have tried re-running 
setup.exe, removing the cygwin directory, re-downloading the setup.exe, 
removing HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Cygwin from the registry, 
setting "Turn on DEP for essential Windows programs and services only" and 
rebooting, altering file and folder permissions, deleting the cache and 
using different mirrors, and using rdesktop in CentOS vs. mstsc.exe in 
Windows to remote desktop in, but none of this changes the behavior.

I have an odd and possibly related behavior. If I open Command Prompt, run
C:\cygwin\bin\bash.exe --norc --noprofile
to get a "bash-4.1$" prompt, then in there run
if [ "foo" = "foo" ]; then echo "Expression evaluated as true."; fi
the bash prompt will exit back to command prompt, and %ERRORLEVEL% has 
been set to 128.
Running that if statement in the window brought up by the Cygwin Terminal 
Desktop shortcut will sometimes make the window close, but not always. I 
have not explored how I might be triggering the Desktop shortcut to work 
or not work.

I have attached setup.log and setup.log.full.

When I run cygcheck -s -v -r > cygcheck.out, it hangs and does not exit. 
Checking Task Manager, I see that it's using ~45% CPU (I have 2 virtual 
cores). It does write some things out to cygcheck.out, which I have 
attached. When I run the command in Command Prompt without redirecting 
output to a file, I get a little more information before it hangs, which I 
have copied out of the command prompt and attached as 
cygcheck-no-redirect.out. I do not know why it's saying I have multiple 
cygwin1.dlls on my path. There is only C:\cygwin\bin\cygwin1.dll.

Looking at cygcheck.out, I am running in a Terminal Service session, which 
makes sense as I am remote desktopped in. My problem might be related to 
FAQ #2.14 (
), but the DEP solution is not helping me. I tried running 
"C:\cygwin\bin>peflags --tsaware=true --tsaware *" in Command Prompt, but 
it did not change anything.

Attachment: setup.log.full
Description: Binary data

Attachment: cygcheck.out
Description: Binary data

Attachment: setup.log
Description: Binary data

Attachment: cygcheck-no-redirect.out
Description: Binary data

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