[Bug 253831] misc/mc More than 1 copy of mc application does not start in sysutils/screen

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253831

            Bug ID: 253831
           Summary: misc/mc More than 1 copy of mc application does not
                    start in sysutils/screen
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs at FreeBSD.org
          Reporter: admin at support.od.ua
                CC: cy at FreeBSD.org, woodsb02 at freebsd.org
                CC: cy at FreeBSD.org, woodsb02 at freebsd.org

More than 1 copy of mc application does not start in sysutils/screen.

Runs only in -U mode (--nosubshell)

Using gdb, I got an approximate reason for the application crash. 
(gdb) where
#0  0x00000008009b3f4f in strlen () from /lib/libc.so.7
#1  0x000000000027788e in ?? ()
#2  0x0000000000276d6c in ?? ()
#3  0x0000000000251791 in ?? ()
#4  0x00000000002447d2 in ?? ()
#5  0x0000000000244c35 in ?? ()
#6  0x0000000000251678 in ?? ()
#7  0x000000000023631f in ?? ()
#8  0x0000000000235bd0 in ?? ()
#9  0x000000080031b000 in ?? ()
#10 0x0000000000000000 in ?? ()


# uname -a
FreeBSD vb-12.2.0.domain.com 12.2-STABLE FreeBSD 12.2-STABLE #0 r369260M: Sat
Feb 13 11:28:24 EET 2021    
root at vb-12.2.0.domain.com:/usr/obj/usr/src/amd64.amd64/sys/vb-12.2.0.domain.com.1
 amd64

# env LC_CTYPE=C LC_ALL=C mc -V
GNU Midnight Commander 4.8.26
Built with GLib 2.66.7
Built with S-Lang 2.3.2 with terminfo database
With builtin Editor
With subshell support as default
With support for background operations
With mouse support on xterm
With internationalization support
With multiple codepages support
Virtual File Systems:
 cpiofs, tarfs, sfs, extfs, ftpfs, sftpfs, fish
Data types:
 char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;


gettext-0.21                   GNU gettext meta package
gettext-runtime-0.21           GNU gettext runtime libraries and programs
gettext-tools-0.21             GNU gettext development and translation tools
glib-2.66.7,1                  Some useful routines of C programming (current
stable version)
gmake-4.3_2                    GNU version of 'make' utility

mc-nox11-4.8.26                Midnight Commander, a free Norton Commander
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