I am getting the same error - running on MacOS High Sierra Version 10.13.2:
"
$ readpst Archive.pst
Opening PST file and indexes...
Processing Folder "Deleted Items"
Processing Folder "Memberships"
Processing Folder "Out of Biz"
Processing Folder "BS Technologies"
Segmentation fault: 11
$
Package: pst-utils
Version: 0.6.59-1+b1
Severity: important
Running readpst on file exported from Outlook as "backup.pst"
readpst -M backup.pst -o .
Opening PST file and indexes...
Processing Folder "Deleted Items"
Processing Folder "Inbox"
"Outlook Data File" - 2 items done, 0 items skipped.
2 matches
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