Hello Branden,
First of all, thanks heaps for testing v1.3.0-rc1 and posting on the list!
I looked at the logs, it seems you have this issue which was discovered some time earlier: https://ticket.coreboot.org/issues/407 The issue has been reported on the #flashrom irc channel, and potential solution has been suggested by reporter (see the description in the ticket). I currently don't have a 32-bit Linux environment, so I haven't done anything yet :\ But looks like you have an environment, would you be able to test the fix ? That would be so helpful! Maybe you will be able to send a patch? :) I am looking at the proposed solution in the ticket, and it very likely will work.
The root cause of the issue is: warnings in unit tests when building for 32-bit Linux. And since we enabled the mode "treat warnings as errors", this fails the build. As a workaround, you can disable Werror by running in your builddir:
meson configure -Dwerror=false
This option is sticky: if you run it once the mode will stay until you enable werror again.
Another option is to build without unit tests, although it is less ideal because unit tests are useful.
Initially we did not mark this bug as release blocking, since it can be worked around relatively easily. But if you are able to send a patch we will gladly accept it and cherry-pick into the release branch!
Let me know what you think? In any case, many thanks for your effort!