[Bug 3728] New: Erroneous Message printed to console - ! debug1: fd 0 clearing O_NONBLOCK

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3728

            Bug ID: 3728
           Summary: Erroneous Message printed to console - ! debug1: fd 0
                    clearing O_NONBLOCK
           Product: Portable OpenSSH
           Version: 9.8p1
          Hardware: Other
                OS: Linux
            Status: NEW
          Severity: trivial
          Priority: P5
         Component: scp
          Assignee: unassigned-bugs at mindrot.org
          Reporter: splitnines at gmail.com

When performing an SCP copy from any Cisco IOS-XE device the following
message is printed to the terminal:

! debug1: fd 0 clearing O_NONBLOCK


The whole output is as follows:

rr1#copy run scp://10.0.0.84:2222/
Address or name of remote host [10.0.0.84]?
Destination username [cisco]? root
Destination filename [rr1-confg]?
Writing rr1-confg
Password:
 Sink: C0644 4809 rr1-confg
! debug1: fd 0 clearing O_NONBLOCK

4809 bytes copied in 3.067 secs (1568 bytes/sec)


I walked back the OpenSSH version on a container image to see which
version this debug message was first observed.  I found that version
openssh-8.7p1 is the first.  Version openssh-8.6p1 does not display the
debug message.

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