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Description of problem:

The `podman build` command segfaults on building any Dockerfile containing a `RUN` instruction.

Version-Release number of selected component (if applicable):

Podman 1.4.1

How reproducible:

100%

Steps to Reproduce:
1. Create a dockerfile with the following contents

FROM fedora
RUN touch /tmp/test1

2. Run `podman build .` in the same directory as the Dockerfile

Actual results:

STEP 1: FROM fedora
STEP 2: RUN touch /tmp/test1
panic: runtime error: index out of range

goroutine 25 [running]:
<remaining error trace snipped>

Expected results:

STEP 1: FROM fedora
STEP 2: RUN touch /tmp/test1
STEP 3: COMMIT
--> 191f4f2be3bbb9a1398ad8a7f7de570d0480bf0ad19189f3a8c451dc1a368ba9

(Successfully built image)

Additional info:

Confirmed not a problem in Buildah - they landed a fresh release (1.9.0) in 8.1 with the fix.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHSA-2019:3403