Tab completion not working inside container

Attempting to use tab completion with bash inside a container triggers the following message:
`bash: cannot create temp file for here-document: Invalid argument`

It seems like it may have something to do with /var/tmp. Trying to write in it for the normal user inside the container:
`$touch foo`
`touch: setting times of 'foo': No such file or directory`

And trying to run dnf without sudo:
`Error: Could not set cachedir: [Errno 22] Invalid argument: '/var/tmp/dnf-myusername-h9bf776j'
`

System is Fedora 32 Silverblue, running Podman 1.9.1