pkg/51213: devel/p5-Scalar-List-Utils fails after system update

[dholland%eecs.harvard.edu@localhost]

>Number:         51213
>Category:       pkg
>Synopsis:       devel/p5-Scalar-List-Utils fails after system update
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 03 01:35:00 +0000 2016
>Originator:     David A. Holland
>Release:        NetBSD 7.0_STABLE (20160531) pkgsrc 20160531
>Organization:
>Environment:
System: NetBSD weatherwax 7.0_STABLE NetBSD 7.0_STABLE (WEATHERWAX) #9: Tue May 31 18:05:25 EDT 2016  ocelot@weatherwax:/usr/src/sys/arch/amd64/compile/WEATHERWAX amd64
Architecture: x86_64
Machine: amd64
>Description:

I updated a -5 machine to -7 and, after recompiling Perl from pkgsrc
HEAD (5.22.2), proceeded to rebuild some necessary Perl modules.

In this state attempting to build any Perl module first goes to
p5-Module-Build and then explodes:

===> Configuring for p5-Module-Build-0.42180
ListUtil.c: loadable library and perl binaries are mismatched (got handshake key 0xd280080, needed 0xd480080)

This turns out to be because the preexisting devel/p5-Scalar-List-Utils 
package was no good after the system update and the Perl rebuild, but
finding this out required more digging than can be expected of the the
average user.

Even if it can't be made to work or automatically rebuild this random
list utils module on its own, can we at least get it to print a
comprehensible message that gives some indication of what's failing?

>How-To-Repeat:
as above

>Fix:
delete :-)