Packer hangs on RHEL 8 and Fedora 34

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Overview of the Issue

I'm seeing the same issue as #5113, namely that Packer is hanging at the command line when issuing any Packer command.

By looking at #5113 I notice that I do have a packer binary in my path even before adding the Hashicorp repo to my systems. Some investigation suggests that this alternative binary (/usr/sbin/packer) is provided by the cracklib-dicts package on Red Hat family systems.

Once I install Packer from the official Hashicorp repos (or simply by downloading the binary), it hangs whenever I try and issue any commands, as described.

Interestingly, the default $PATH on both Fedora and RHEL sets the order of precedence such that once Hashicorp Packer is installed (into /usr/bin/packer), that binary takes precedence over the one from cracklib (in /usr/sbin/packer) so I'm a little unsure why the commands are hanging. If anything, I'd expect installing Hashicorp Packer to break Cracklib Packer and not the other way around.

Reproduction Steps

Install Packer on a default Workstation install of either RHEL 8 or Fedora 34.

Packer version

Well packer version hangs at the command line, but:

╰─ rpm -q packer
packer-1.7.2-1.x86_64

Simplified Packer Buildfile

Any

(Can reproduce the problem without a buildfile even being present)

Operating system and Environment details

RHEL 8 / Fedora 34 confirmed x86_64 Latest packer from official Hashicorp repositories Fairly default Workstation install for both (which appear to pull in cracklib-dicts as a requirement for password enforcement)

Log Fragments and crash.log files

As with #5113, setting PACKER_LOG=1 does not produce any logs.