Workaround: 'readelf -n core' and look at the first mapped file.

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https://bugs.launchpad.net/bugs/1511720

Title:
  fails to identify what program left a core file

Status in file package in Ubuntu:
  New

Bug description:
  Steps to reproduce:

  - 'ulimit -c unlimited' so you get core files
  - get a program to crash
  - run 'file core' to see what program it was that crashed

  Expected results:

  - file tells me the name of the program

  Actual results:

  - "core: ELF 64-bit LSB core file x86-64, version 1 (SYSV), too many
  program headers (463)"

  
  This matters when you find a 'core' file after time has passed and you don't 
remember when or what crashed.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.10
  Package: file 1:5.22+15-2ubuntu1
  ProcVersionSignature: Ubuntu 4.2.0-16.19-generic 4.2.3
  Uname: Linux 4.2.0-16-generic x86_64
  ApportVersion: 2.19.1-0ubuntu4
  Architecture: amd64
  CurrentDesktop: GNOME
  Date: Fri Oct 30 14:40:56 2015
  Dependencies:
   gcc-5-base 5.2.1-22ubuntu2
   libc6 2.21-0ubuntu4
   libgcc1 1:5.2.1-22ubuntu2
   libmagic1 1:5.22+15-2ubuntu1
   zlib1g 1:1.2.8.dfsg-2ubuntu4
  EcryptfsInUse: Yes
  InstallationDate: Installed on 2012-07-25 (1191 days ago)
  InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 
(20120425)
  SourcePackage: file
  UpgradeStatus: Upgraded to wily on 2015-10-22 (7 days ago)

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