Comment 6 for bug 1790583

After a git bisect, it seems that the issue was introduced here:

b0bcb59c15c48456c41b5bffe917b6a4b7854f2b is the first bad commit
commit b0bcb59c15c48456c41b5bffe917b6a4b7854f2b
Author: Scott Little <email address hidden>
Date: Wed Aug 29 16:04:16 2018 -0400

    Build: Improved logging, error handling, and other small fixes

    Add function and line number to error logs.

    Log git commands that are issured when using --edit.

    Replace global DIR variable with a more unique variable name.
    DIR is used in many scripts that get sourced, possibly overwriting
    the value in the calling script.

    Make sure scripts won't fail if a redundant --parallel or --serial
    argurement is seen.