Summary of my perl5 (revision 5 version 26 subversion 1) configuration:

Platform:
osname=linux
osvers=3.2.0-24-virtual
archname=x86_64-linux-thread-multi
uname='linux perl-stackato64-precise 3.2.0-24-virtual #39-ubuntu smp mon may 21 18:44:18 utc 2012 x86_64 x86_64 x86_64 gnulinux '
config_args='-ders -Dcc=gcc -Dusethreads -Duseithreads -Uinstallusrbinperl -Ulocincpth= -Uloclibpth= -Duse64bitall -Accflags=-DUSE_SITECUSTOMIZE -Duselargefiles -Accflags=-DPERL_RELOCATABLE_INCPUSH -Accflags=-fno-merge-constants -Dprefix=/opt/ActivePerl-5.26 -Dprivlib=/opt/ActivePerl-5.26/lib -Darchlib=/opt/ActivePerl-5.26/lib -Dsiteprefix=/opt/ActivePerl-5.26/site -Dsitelib=/opt/ActivePerl-5.26/site/lib -Dsitearch=/opt/ActivePerl-5.26/site/lib -Dsed=/bin/sed -Duseshrplib -Dcf_by=ActiveState -Dcf_email=support@ActiveState.com'
hint=recommended
useposix=true
d_sigaction=define
useithreads=define
usemultiplicity=define
use64bitint=define
use64bitall=define
uselongdouble=undef
usemymalloc=n
default_inc_excludes_dot=define
bincompat5005=undef
Compiler:
cc='gcc'
ccflags ='-D_REENTRANT -D_GNU_SOURCE -DUSE_SITECUSTOMIZE -DPERL_RELOCATABLE_INCPUSH -fno-merge-constants -fwrapv -fno-strict-aliasing -pipe -fstack-protector -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64'
optimize='-O2'
cppflags='-D_REENTRANT -D_GNU_SOURCE -DUSE_SITECUSTOMIZE -DPERL_RELOCATABLE_INCPUSH -fno-merge-constants -fwrapv -fno-strict-aliasing -pipe -fstack-protector'
ccversion=''
gccversion='4.6.3'
gccosandvers=''
intsize=4
longsize=8
ptrsize=8
doublesize=8
byteorder=12345678
doublekind=3
d_longlong=define
longlongsize=8
d_longdbl=define
longdblsize=16
longdblkind=3
ivtype='long'
ivsize=8
nvtype='double'
nvsize=8
Off_t='off_t'
lseeksize=8
alignbytes=8
prototype=define
Linker and Libraries:
ld='gcc'
ldflags =' -fstack-protector'
libpth=/usr/local/lib /usr/lib /lib/../lib /usr/lib/../lib /lib /lib64 /usr/lib64 /usr/local/lib64
libs=-lpthread -lnsl -ldb -ldl -lm -lcrypt -lutil -lc
perllibs=-lpthread -lnsl -ldl -lm -lcrypt -lutil -lc
libc=libc-2.15.so
so=so
useshrplib=true
libperl=libperl.so
gnulibc_version='2.15'
Dynamic Linking:
dlsrc=dl_dlopen.xs
dlext=so
d_dlsymun=undef
ccdlflags='-Wl,-E -Wl,-rpath,/opt/ActivePerl-5.26/lib/CORE'
cccdlflags='-fPIC'
lddlflags='-shared -O2 -fstack-protector'


Characteristics of this binary (from libperl):
Compile-time options:
HAS_TIMES
MULTIPLICITY
PERLIO_LAYERS
PERL_COPY_ON_WRITE
PERL_DONT_CREATE_GVSV
PERL_IMPLICIT_CONTEXT
PERL_MALLOC_WRAP
PERL_OP_PARENT
PERL_PRESERVE_IVUV
PERL_RELOCATABLE_INCPUSH
USE_64_BIT_ALL
USE_64_BIT_INT
USE_ITHREADS
USE_LARGE_FILES
USE_LOCALE
USE_LOCALE_COLLATE
USE_LOCALE_CTYPE
USE_LOCALE_NUMERIC
USE_LOCALE_TIME
USE_PERLIO
USE_PERL_ATOF
USE_REENTRANT_API
USE_SITECUSTOMIZE
Locally applied patches:
ActivePerl Build 2601 404865
Built under linux
Compiled at Dec 11 2017 13:17:08
@INC:
/opt/ActivePerl-5.26/site/lib
/opt/ActivePerl-5.26/lib

I don't really have an understanding of what's going wrong here, but I'm wondering if the error you see is reproduced by running:

perl -Mthreads -le 1
[download]

Can you confirm ?

Cheers,
Rob