Package: libdpkg-perl Version: 1.18.4 Severity: normal Dear Maintainer,
The quilt package format's check_patches_applied() silently fails to apply patches if the first patch in the series emits a warning. An example is the current version of python-letsencrypt (0.1.1-3), whose first patch in the series patches a file twice - thus emitting a warning: tmp/letsencrypt-0.1.1 $ dpkg-source --before-build . dpkg-source: warning: diff 'letsencrypt-0.1.1/debian/patches/permission-failures.patch' patches file letsencrypt-0.1.1/letsencrypt/plugins/webroot_test.py twice dpkg-source: warning: diff 'letsencrypt-0.1.1/debian/patches/permission-failures.patch' patches file letsencrypt-0.1.1/letsencrypt/plugins/webroot_test.py twice /tmp/letsencrypt-0.1.1 $ Re-ordering the patches in the series file leads to the whole series being applied normally. Since patching the same file twice is a warning and not an error, it should not stop dpkg-source --before-build from applying the series. Regards, Apollon -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (500, 'testing'), (500, 'stable'), (90, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386, mips Kernel: Linux 4.2.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=el_GR.UTF-8, LC_CTYPE=el_GR.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages libdpkg-perl depends on: ii dpkg 1.18.4 ii perl 5.20.2-6 Versions of packages libdpkg-perl recommends: ii bzip2 1.0.6-8 ii libfile-fcntllock-perl 0.22-3 ii xz-utils 5.1.1alpha+20120614-2.1 Versions of packages libdpkg-perl suggests: ii binutils 2.25.90.20151209-1 ii debian-keyring 2015.11.30 ii gcc [c-compiler] 4:5.3.1-1 ii gcc-4.6 [c-compiler] 4.6.4-7 ii gcc-4.7 [c-compiler] 4.7.4-3 ii gcc-4.8 [c-compiler] 4.8.5-3 ii gcc-4.9 [c-compiler] 4.9.3-10 ii gcc-5 [c-compiler] 5.3.1-4 ii gnupg 1.4.20-1 ii gnupg2 2.0.28-3 ii gpgv 1.4.20-1 ii patch 2.7.5-1 -- debconf-show failed
