package gdb 7.11-0ubuntu1 failed to install/upgrade: package gdb is not ready for configuration cannot configure (current status 'half-installed')

[bumkailashkumar]

i dont know what cause this error but i was installing unity tweak tool through terminal

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: gdb 7.11-0ubuntu1
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
AptOrdering:
 gdb: Configure
 NULL: ConfigurePending
Architecture: amd64
Date: Sat Jul 23 20:05:53 2016
DuplicateSignature:
 package:gdb:7.11-0ubuntu1
 Unpacking dpkg-dev (1.18.4ubuntu1.1) over (1.18.4ubuntu1) ...
   Log started: 2016-07-23 20:05:52
 dpkg: error processing package gdb (--configure):
  package gdb is not ready for configuration
ErrorMessage: package gdb is not ready for configuration cannot configure (current status 'half-installed')
InstallationDate: Installed on 2016-07-18 (5 days ago)
InstallationMedia: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.1
 apt 1.2.12~ubuntu16.04.1
SourcePackage: gdb
Title: package gdb 7.11-0ubuntu1 failed to install/upgrade: package gdb is not ready for configuration cannot configure (current status 'half-installed')
UpgradeStatus: No upgrade log present (probably fresh install)