rsync - Mar 2023 - rsync 3.2.7 hangs when --usermap is used and receiver is not a super-user

After upgrading to rsync 3.2.7, the following command hangs forever 
(using "--usermap" causes the hang; without "--usermap" it
doesn't
hang):

rsync -v -p -e --usermap user:user /etc/services user at remote:

It did not hang with rsync 3.2.3.

Not sure if it's intended behaviour? The fine manual says that --usermap 
should be used as a super-user on the receiver, but does not mention 
that it will hang if used as a non-super-user.

Reproducible on Ubuntu 20.04 LTS.


Tomasz Chmielewski

Hi.

On Wed, 08 Mar 2023 22:21:28 +0100 Tomasz Chmielewski via rsync wrote:
> After upgrading to rsync 3.2.7, the following command hangs forever 
> (using "--usermap" causes the hang; without "--usermap"
it doesn't
> hang):
> rsync -v -p -e --usermap user:user /etc/services user at remote:
This command is incorrect: the -e option needs a command.

Without -e this command works for me on Fedora-37 with
rsync-3.2.7-1.fc37.x86_64

-- 
francis