Package: libdpkg-perl
Version: 1.18.25
Severity: normal

$ perl -we 'use Data::Dumper; print Dumper($SIG{INT})'
$VAR1 = undef;
$ perl -we 'use Data::Dumper; use Dpkg::Source::Package; print 
Dumper($SIG{INT})'
$VAR1 = sub { "DUMMY" };
$

This is a problem because when a SIGINT handler is installed, perl
will not immediately exit when it is in some other C library.

For example,

$ perl -we 'use Data::Dumper; use WWW::Curl::Easy; my $curl = 
WWW::Curl::Easy->new; $curl->setopt(CURLOPT_URL, "http://192.0.2.1";); 
$curl->perform()'
^C [returns prompt immediately]
$ perl -we 'use Data::Dumper; use WWW::Curl::Easy; use Dpkg::Source::Package; 
my $curl = WWW::Curl::Easy->new; $curl->setopt(CURLOPT_URL, 
"http://192.0.2.1";); $curl->perform()'
^C [hangs]

If libdpkg-perl needs a signal handler it should install it only
during its own operations, probably localising it and arranging to
chain to the original handler (if any) when it has done its own work.

But I doubt the necessity.

Thanks,
Ian.

-- System Information:
Debian Release: 9.9
  APT prefers oldstable-debug
  APT policy: (500, 'oldstable-debug'), (500, 'oldstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-0.bpo.5-amd64 (SMP w/4 CPU cores)
Locale: LANG=C.UTF-8, LC_CTYPE=C.UTF-8 (charmap=UTF-8), LANGUAGE=C.UTF-8 
(charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: sysvinit (via /sbin/init)

Versions of packages libdpkg-perl depends on:
ii  dpkg  1.18.25
ii  perl  5.24.1-3+deb9u5

Versions of packages libdpkg-perl recommends:
ii  bzip2                   1.0.6-8.1
ii  libfile-fcntllock-perl  0.22-3+b2
ii  liblocale-gettext-perl  1.07-3+b1
ii  xz-utils                5.2.2-1.2+b1

Versions of packages libdpkg-perl suggests:
ii  bcc [c-compiler]    0.16.17-3.2
ii  binutils            2.28-5
ii  debian-keyring      2017.05.28
ii  gcc [c-compiler]    4:6.3.0-4
ii  gcc-5 [c-compiler]  5.4.1-4
ii  gcc-6 [c-compiler]  6.3.0-18+deb9u1
ii  gnupg               2.1.18-8~deb9u4
ii  gnupg2              2.1.18-8~deb9u4
ii  gpgv                2.1.18-8~deb9u4
ii  patch               2.7.5-1+deb9u1

-- no debconf information

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