pkg/53478: p5-Text-Markdown-Discount-0.11nb5 fails self-tests on NetBSD

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>Number:         53478
>Category:       pkg
>Synopsis:       p5-Text-Markdown-Discount-0.11nb5 fails self-tests on NetBSD
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Jul 29 08:25:00 +0000 2018
>Originator:     Amitai Schleier
>Release:        NetBSD 7, pkgsrc-current
>Organization:
Schmonz Enterprises
>Environment:
NetBSD magnetic-babysitter-netbsd7.local 7.1.2 NetBSD 7.1.2 (GENERIC.201803151611Z) amd64
>Description:
textproc/p5-Text-Markdown-Discount passes its self-tests on OS X, CentOS 6 and 7, and Tribblix, but fails on NetBSD 7 and 8 (at least).

The failing tests are for UTF8.
>How-To-Repeat:
$ cd textproc/p5-Text-Markdown-Discount
$ cvs -q up -PAd
$ make test
>Fix:
Can't figure out what's going on, would love some help.