Ran into a problem this morning where starting a ddev project resulted in this error:

2.677 Preparing to unpack .../libmcrypt-dev_2.5.8-7_amd64.deb ...
2.681 Unpacking libmcrypt-dev (2.5.8-7) ...
2.718 E: Sub-process /usr/bin/dpkg received a segmentation fault.
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', stderr='Dockerfile:37

I searched for this error but only found a few results, one of the results suggested rebooting.

To fix the problem all I needed to do was run ddev poweroff then restart the project with the usual ddev start, then it booted up just fine.