fork issue when lauching cygwin64 process from 32bit native app on Windows 10 TH2

David Macek
Tue Dec 1 17:40:00 GMT 2015

On 1. 12. 2015 15:01, Corinna Vinschen wrote:
> On Dec  1 21:07, nu774 wrote:
>>> There must be a bug in the new CMD somewhere.  But, anyway, I'll look
>>> into it when I finally managed to update my W10 test machine.
>> No, cmd.exe is just an example. Any 32bit process can be an trigger.
>> I guess something has changed in TH2 kernel regarding process memory
>> management or something that interferes cygwin's fork().
> If that only happens w/ 64 bit Cygwin started from a 32 bit parent, then
> there's some foul-up in the WOW64 layer in terms of starting 64 bit
> processes, perhaps.  Sigh, it's a rather unexpected change after it
> worked fine for so long :(

Yup. I can confirm.

David Macek

-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4254 bytes
Desc: S/MIME Cryptographic Signature
URL: <>

More information about the Cygwin mailing list