[Bug 1615757] Re: click install fails on 16.10, causing user install and autopkgtest failures

[Colin Watson]

The dpkg output from comment #6 isn't relevant, since that didn't have
all the special preloading setup in place.

Adding a bit more debugging to click's preload shim (now in
lp:click/devel) reveals:

Error getting address of symbol 'mknod':
/home/cjwatson/src/ubuntu/click/click/preload/.libs/libclickpreload.so:
undefined symbol: mknod

So it seems that this must be due to glibc changes, although I'm a bit
baffled how that could be since xenial's libc doesn't seem to have a
'mknod' symbol either and none of the changes in the diff appear
relevant.  Maybe we were accidentally overloading a mknod from some
other library?  Not sure.  Perhaps it's the overlap of several toolchain
changes.  Anyway, preloading __xmknod instead fixes it; it's a bit
nasty, but no worse than the stuff we already do with __xstat.

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https://bugs.launchpad.net/bugs/1615757

Title:
  click install fails on 16.10, causing user install and autopkgtest
  failures

Status in click package in Ubuntu:
  New

Bug description:
  click crashed with:

  click crashed with subprocess.CalledProcessError in run(): Command
  '['dpkg', '--force-not-root', '--force-bad-path', '--force-
  architecture', '--instdir',
  '/opt/click.ubuntu.com/com.ubuntu.filemanager/0.4.525', '--admindir',
  '/opt/click.ubuntu.com/com.ubuntu.filemanager/0.4.525/.click',
  '--path-exclude', '*/.click/*', '--log',
  '/opt/click.ubuntu.com/.click/log', '--no-triggers', '--install',
  '/home/emanuele/Scaricati/com.ubuntu.filemanager_0.4.525_multi.click']'
  returned non-zero exit status 1

  ProblemType: Crash
  DistroRelease: Ubuntu 16.10
  Package: click 0.4.44+16.10.20160811.1-0ubuntu1
  ProcVersionSignature: Ubuntu 4.4.0-9134.53-generic 4.4.15
  Uname: Linux 4.4.0-9134-generic x86_64
  ApportVersion: 2.20.3-0ubuntu7
  Architecture: amd64
  Date: Mon Aug 22 11:16:02 2016
  ExecutablePath: /usr/bin/click
  InstallationDate: Installed on 2016-08-21 (1 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  InterpreterPath: /usr/bin/python3.5
  ProcCmdline: /usr/bin/python3 /usr/bin/click install --user emanuele /home/emanuele/Scaricati/com.ubuntu.filemanager_0.4.525_multi.click
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=it_IT.UTF-8
   LANGUAGE=it
   SHELL=/bin/bash
  PythonArgs: ['/usr/bin/click', 'install', '--user', 'emanuele', '/home/emanuele/Scaricati/com.ubuntu.filemanager_0.4.525_multi.click']
  SourcePackage: click
  Title: click crashed with subprocess.CalledProcessError in run(): Command '['dpkg', '--force-not-root', '--force-bad-path', '--force-architecture', '--instdir', '/opt/click.ubuntu.com/com.ubuntu.filemanager/0.4.525', '--admindir', '/opt/click.ubuntu.com/com.ubuntu.filemanager/0.4.525/.click', '--path-exclude', '*/.click/*', '--log', '/opt/click.ubuntu.com/.click/log', '--no-triggers', '--install', '/home/emanuele/Scaricati/com.ubuntu.filemanager_0.4.525_multi.click']' returned non-zero exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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