Does the Cygwin setup program do internal sanity checks on startup?

Brian Cowan
Wed Aug 31 12:14:35 GMT 2022

Well, is it possible to use 7zip? It seems like you can do something like it in:

Not that I think this would help with heuristics, and some AV tools REALLY don't like executing things from users' temp directories. (Which .Net applications seem to like to do sometimes.)

Maybe have compressed and uncompressed installers?

Brian Cowan
HCL Software
Technical Specialist, ClearCase SWAT

-----Original Message-----
From: Cygwin <> On Behalf Of Jon Turney
Sent: Sunday, August 28, 2022 11:46 AM
To: The Cygwin Mailing List <>
Subject: Re: Does the Cygwin setup program do internal sanity checks on startup?

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On 25/08/2022 19:14, Brian Cowan via Cygwin wrote:
> And this was exactly it. I downloaded the latest UPX version, and it
> crashed on startup. I downloaded the Linux version on another host,
> copied the setup program to that host and extracted it there. NOW I
> can update Cygwin...

I wonder if UPX compression of setup makes as much sense now as it did
20+ years ago.

Not only does it (occasionally) generate problems like this, but also with malware detection heuristics.

OTOH, not using it would make setup ~4x larger.
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