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Date: Tue, 6 Apr 2021 15:16:56 +0200
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Subject: IBM MQ client application fails on latest cygwin
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From: =?utf-8?q?Morten_Kj=C3=A6rulff_via_Cygwin?= <cygwin AT cygwin DOT com>
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Sender: "Cygwin" <cygwin-bounces AT cygwin DOT com>

Hi,

Came back from easter vacation today and updated my cygwin
installation. I havn't touched my PC since March 26.

I have a non-cygwin IBM MQSeries client application which I call from
a script. It connects to my z/OS MQ server.

When I run it from a windows command prompt, it works fine.

When I run it from mintty, it fails in a strange way.
On my PC I see
2539 (09EB) (RC2539): MQRC_CHANNEL_CONFIG_ERROR
On z/OS I see
CSQX575E QMGR CSQXRESP Negotiation failed for channel
CSQX228E QMGR CSQXRESP Listener unable to start channel,
channel ????
TRPTYPE=TCP INDISP=QMGR
So it seems some garbage has been sent.

Installing old versions of mintty gives the same result.

Installing an old version of cygwin seems to resolve the issue:
3.2.0-1 fail
3.1.7-1 fine

How can I help?

/Morten
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