lib/55249: lib/libi386/t_user_ldt tests failing since inception

[gson%gson.org@localhost (Andreas Gustafsson)]

>Number:         55249
>Category:       lib
>Synopsis:       lib/libi386/t_user_ldt tests failing since inception
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    lib-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat May 09 08:20:02 +0000 2020
>Originator:     Andreas Gustafsson
>Release:        NetBSD-current
>Organization:

>Environment:
System: NetBSD
Architecture: x86_64
Machine: amd64
>Description:

Both test cases of the lib/libi386/t_user_ldt test program, filter_ops
and user_ldt, have been failing ever since the test was committed on
April 19.

Logs from recent failures:

  http://releng.netbsd.org/b5reports/amd64/2020/2020.05.06.20.40.33/test.html#lib_libi386_t_user_ldt_filter_ops
  http://www.gson.org/netbsd/bugs/build/amd64-baremetal/2020/2020.05.08.17.28.33/test.html#lib_libi386_t_user_ldt_filter_ops
  
>How-To-Repeat:

cd /usr/tests/lib/libi386
atf-run t_user_ldt | atf-report

>Fix: