bin/60472: ld.elf_so(1) changes cause a segmentation fault in dlopen(3)

["tron%zhadum.org.uk@localhost via gnats" <gnats-admin%NetBSD.org@localhost>]

>Number:         60472
>Category:       bin
>Synopsis:       ld.elf_so(1) changes cause a segmentation fault in dlopen(3)
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon Jul 20 18:35:00 +0000 2026
>Originator:     tron%zhadum.org.uk@localhost
>Release:        NetBSD 11.99.7 2026-07-20 06:00 UTC sources
>Organization:
Matthias Scheler                                 https://zhadum.org.uk/
>Environment:
System: NetBSD lyssa.zhadum.org.uk 11.99.7 NetBSD 11.99.7 (GENERIC) #0: Mon Jul 20 14:06:12 BST 2026 tron%lyssa.zhadum.org.uk@localhost:/export/scratch/tron/sys/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
After upgrading my NetBSD-amd64 system from NetBSD-current 2026-07-13 to
2026-07-20 I can no longer build the "textproc/xmlto" package from
"pkgsrc". There might be more problems but this is the first one that
I've noticed.

This caused by a segmentation fault in the "/usr/pkg/bin/xsltproc" utility.
A core dump suggests that it crashes in dlopen(3).

After downgrading ld.elf_so(1) to 2026-07-13 sources the "xsltproc" utility
works fien again.

>How-To-Repeat:
cd pkgsrc/textproc/xmlto
make

>Fix:
None known