[Bug 1927161] Re: dpkg-source: error: diff 'openssl/debian/patches/pr12272.patch' patches files multiple times; split the diff in multiple files or merge the hunks into a single one

[Ubuntu Foundations Team Bug Bot]

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** Tags added: patch

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https://bugs.launchpad.net/bugs/1927161

Title:
  dpkg-source: error: diff 'openssl/debian/patches/pr12272.patch'
  patches files multiple times; split the diff in multiple files or
  merge the hunks into a single one

Status in openssl package in Ubuntu:
  In Progress
Status in openssl source package in Groovy:
  In Progress
Status in openssl source package in Hirsute:
  In Progress
Status in openssl source package in Impish:
  In Progress

Bug description:
  [impact]

  openssl doesn't build source properly because of a badly-constructed
  patch

  [test case]

  $ pull-lp-source openssl groovy
  ...
  $ cd openssl-1.1.1f/
  $ quilt pop -a
  ...
  $ dpkg-buildpackage -d -S
  dpkg-buildpackage: info: source package openssl
  dpkg-buildpackage: info: source version 1.1.1f-1ubuntu4.3
  dpkg-buildpackage: info: source distribution groovy-security
  dpkg-buildpackage: info: source changed by Marc Deslauriers <marc.deslauriers at ubuntu.com>
   dpkg-source --before-build .
  dpkg-source: warning: can't parse dependency perl:native
  dpkg-source: error: diff 'openssl-1.1.1f/debian/patches/pr12272.patch' patches files multiple times; split the diff in multiple files or merge the hunks into a single one
  dpkg-buildpackage: error: dpkg-source --before-build . subprocess returned exit status 25

  Test builds are available in the following ppa:

  https://launchpad.net/~mruffell/+archive/ubuntu/lp1927161-test

  [regression potential]

  any regression would likely cause a failed build or would affect the
  functionality that patch pr12272 was added for, which is adding
  support for Intel CET

  [scope]

  this is needed only for g and later

  this is caused by the bad patch 'pr12272.patch' which is only included
  in g/h/i, so this does not apply to f or earlier

  [other info]

  note that if the patches are applied, this bug is bypassed; i.e. if
  'quilt pop -a' is removed from the test case above, the bug doesn't
  reproduce. this is only a problem when the patches aren't already
  applied and dpkg-buildpackage needs to call dpkg-source to apply the
  patches.

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