[Bug 1845529] Re: bash completion in 19.10 shows `awk: line 18: function gensub never defined` on ``umount /dev/<Tab>`

[Norbert]

I have tested this on the live system of Ubuntu MATE (http://cdimage.ubuntu.com/ubuntu-mate/daily-live/20191010/eoan-desktop-amd64.iso).
Here we have only `mawk` package pre-installed. Such a system does not have `gawk` installed.

Aptitude says that `mawk` was installed because of `ubuntu-minimal`
(also see see https://packages.ubuntu.com/eoan/ubuntu-minimal ):

```
aptitude why mawk
i   ubuntu-minimal Depends mawk
```


The system installed from netboot.iso (http://archive.ubuntu.com/ubuntu/dists/eoan/main/installer-amd64/current/images/netboot/mini.iso) is affected too.

So really It seems that `mawk` package is buggy.

---

It would be really great if you fix this package before final release of 19.10.
Or change `ubuntu-minimal` dependency on `mawk` to `gawk`.

** No longer affects: ubuntu-mate-meta (Ubuntu)

** No longer affects: ubuntu-meta (Ubuntu)

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https://bugs.launchpad.net/bugs/1845529

Title:
  bash completion in 19.10 shows `awk: line 18: function gensub never
  defined` on ``umount /dev/<Tab>`

Status in bash-completion package in Ubuntu:
  Confirmed
Status in mawk package in Ubuntu:
  New
Status in Debian:
  Confirmed

Bug description:
  Steps to reproduce:
  1. Install Ubuntu MATE 19.10 using minimal desktop option
  2. Open terminal and enter `umount /dev/s` and then hit <Tab>

  Expected result:
  * bash completion works as expected

  Actual results:
  * bash completion does not work :

  $ umount /dev/awk: line 18: function gensub never defined
  awk: line 18: function gensub never defined
  awk: line 18: function gensub never defined
  awk: line 18: function gensub never defined

  
  $ umount /meawk: line 18: function gensub never defined
  awk: line 18: function gensub never defined
  awk: line 18: function gensub never defined
  awk: line 18: function gensub never defined

  ProblemType: Bug
  DistroRelease: Ubuntu 19.10
  Package: bash-completion 1:2.9-1ubuntu1
  ProcVersionSignature: Ubuntu 5.3.0-10.11-generic 5.3.0-rc8
  Uname: Linux 5.3.0-10-generic x86_64
  ApportVersion: 2.20.11-0ubuntu7
  Architecture: amd64
  CurrentDesktop: MATE
  Date: Thu Sep 26 18:46:59 2019
  Dependencies:
   
  InstallationDate: Installed on 2019-09-26 (0 days ago)
  InstallationMedia: Ubuntu-MATE 19.10 "Eoan Ermine" - Beta amd64 (20190926.1)
  PackageArchitecture: all
  SourcePackage: bash-completion
  UpgradeStatus: No upgrade log present (probably fresh install)

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