[Bug 1594670] Re: rpm on ubuntu 16.04 fails to honor non-zero exit from preun scriptlet

[Ubuntu Foundations Team Bug Bot]

The attachment "rpm-fix-preun.debdiff" seems to be a patch.  If it
isn't, please remove the "patch" flag from the attachment, remove the
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unsubscribe the team.

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** Tags added: patch

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https://bugs.launchpad.net/bugs/1594670

Title:
  rpm on ubuntu 16.04  fails to honor non-zero exit from preun scriptlet

Status in rpm package in Ubuntu:
  New
Status in rpm package in Debian:
  Confirmed

Bug description:
  ---Problem Description---
  rpm erase does not honour a non-zero exit code from preuninstall scriptlet. 
   
  ---uname output---
  Linux kanyu 4.4.0-22-generic #40-Ubuntu SMP Thu May 12 22:03:46 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
   
  Machine Type = VMware 
   
  ---Debugger---
  A debugger is not configured
   
  ---Steps to Reproduce---
   Install the IBM MQ rpms 
  create and start a queue manager
  attempt to uninstall ( rpm -qa | grep MQSeries | xargs rpm -e) 
  preuninstall scriptlets correct exit with status of 1 but rpm continues with erase.  

  This is occurring on x86_64, ppcle and Z 
  rpm on Ubuntu 14.4 and earlier behaved as expected, erase aborted on non-zero exit from preun 

  
  ats at kanyu:~$ apt list rpm
  Listing... Done
  rpm/xenial,now 4.12.0.1+dfsg1-3build3 amd64 [installed]
  ats at kanyu:~$

   
  Userspace tool common name: rpm 
   
  The userspace tool has the following bit modes: 64-bit 

  Userspace rpm: rpm/xenial,now 4.12.0.1+dfsg1-3build3 amd64

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