buildah: /bin/bash: cannot execute binary file

Generated Image seems to be corrupt.

ctr=$(buildah from centos:7)
buildah config --workingdir /tmp $ctr
buildah config --entrypoint /bin/bash $ctr
buildah commit $ctr test1

podman run --rm -it test1
/bin/bash: /bin/bash: cannot execute binary file

A simple example like this works fine in docker:

FROM centos:7
ENTRYPOINT /bin/bash
WORKDIR /tmp

Output of rpm -q buildah or apt list buildah:

buildah-0.16-1.git82529cd.fc27.x86_64

Output of buildah version:

Version:       0.16
Go Version:    go1.9.4
Image Spec:    1.0.0
Runtime Spec:  1.0.0
Git Commit:    82529cd
Built:         Wed Apr  4 11:22:14 2018
OS/Arch:       linux/amd64

Output of cat /etc/*release:

Fedora release 27 (Twenty Seven)

Output of uname -a:

Linux jw-laptop 4.15.16-300.fc27.x86_64 #1 SMP Mon Apr 9 17:50:06 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Output of cat /etc/containers/storage.conf:

# storage.conf is the configuration file for all tools
# that share the containers/storage libraries
# See man 5 containers-storage.conf for more information

# The "container storage" table contains all of the server options.
[storage]

# Default Storage Driver
driver = "overlay"

# Temporary storage location
runroot = "/var/run/containers/storage"

# Primary Read/Write location of container storage
graphroot = "/var/lib/containers/storage"

[storage.options]
# AdditionalImageStores is used to pass paths to additional Read/Only image stores
# Must be comma separated list.
additionalimagestores = [
]

# Size is used to set a maximum size of the container image.  Only supported by
# certain container storage drivers.
size = ""

# OverrideKernelCheck tells the driver to ignore kernel checks based on kernel version
override_kernel_check = "true"