-V flag

$ perl -Vusedevel
Abort

Right, I forgot the :

$ perl -V:usedevel
usedevel='undef';

But why does it abort? Or dump core? Well, it is because -V is just
another option that can be bundled. In this case bundled with -u, which
tells perl to abort.

How likely is it that -V is passed with any other options than perhaps
-I ?

More fun:

$ perl -Vle'print 42'
Summary of my perl5 (revision 5 version 12 subversion 2) configuration:

  Platform:
    osname=linux, osvers=2.6.34.7-0.2-desktop, archname=i686-linux-64int-ld
    uname='linux tux09.procura.nl 2.6.34.7-0.2-desktop #1 smp preempt 2010-09-14 14:21:06 +0200 i686 i686 i386 gnulinux '
    config_args='-Duse64bitint -Duselongdouble -des'
    hint=recommended, useposix=true, d_sigaction=define
    useithreads=undef, usemultiplicity=undef
    useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
    use64bitint=define, use64bitall=undef, uselongdouble=define
    usemymalloc=n, bincompat5005=undef
  Compiler:
    cc='cc', ccflags ='-fno-strict-aliasing -pipe -fstack-protector -I/pro/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64',
    optimize='-O2',
    cppflags='-fno-strict-aliasing -pipe -fstack-protector -I/pro/local/include'
    ccversion='', gccversion='4.5.0 20100604 [gcc-4_5-branch revision 160292]', gccosandvers=''
    intsize=4, longsize=4, ptrsize=4, doublesize=8, byteorder=12345678
    d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=12
    ivtype='long long', ivsize=8, nvtype='long double', nvsize=12, Off_t='off_t', lseeksize=8
    alignbytes=4, prototype=define
  Linker and Libraries:
    ld='cc', ldflags ='-L/pro/local/lib -fstack-protector'
    libpth=/pro/local/lib /lib /usr/lib /usr/local/lib
    libs=-lnsl -lgdbm -ldb -ldl -lm -lcrypt -lutil -lc -lgdbm_compat
    perllibs=-lnsl -ldl -lm -lcrypt -lutil -lc
    libc=/lib/libc-2.11.2.so, so=so, useshrplib=false, libperl=libperl.a
    gnulibc_version='2.11.2'
  Dynamic Linking:
    dlsrc=dl_dlopen.xs, dlext=so, d_dlsymun=undef, ccdlflags='-Wl,-E'
    cccdlflags='-fPIC', lddlflags='-shared -O2 -L/pro/local/lib -fstack-protector'



Characteristics of this binary (from libperl):

  Compile-time options: PERL_DONT_CREATE_GVSV PERL_MALLOC_WRAP USE_64_BIT_INT
                        USE_LARGE_FILES USE_LONG_DOUBLE USE_PERLIO
                        USE_PERL_ATOF

  Built under linux

  Compiled at Sep 20 2010 11:34:54

  @INC:

    /pro/lib/perl5/site_perl/5.12.2/i686-linux-64int-ld

    /pro/lib/perl5/site_perl/5.12.2

    /pro/lib/perl5/5.12.2/i686-linux-64int-ld

    /pro/lib/perl5/5.12.2

    .

42
$

FWIW, these empty lines at the end do *not* occur in perl-5.10.1


-- 
H.Merijn Brand  http://tux.nl      Perl Monger  http://amsterdam.pm.org/
using 5.00307 through 5.12 and porting perl5.13.x on HP-UX 10.20, 11.00,
11.11, 11.23 and 11.31, OpenSuSE 10.1, 11.0 .. 11.3 and AIX 5.2 and 5.3.
http://mirrors.develooper.com/hpux/           http://www.test-smoke.org/
http://qa.perl.org      http://www.goldmark.org/jeff/stupid-disclaimers/

• -V flag by H.Merijn Brand