title: fatal: git write-tree failed to write a tree
body: <p>I have a private repository in bitbucket.There are two branch one is <strong>master</strong> and anoter is <strong>eventdesign.</strong> Designer does design in eventdesign branch.Now, i want to merge the eventdesign branch with the master so that i can use the design.i used the following command.</p>
  
  <p><strong>git fetch origin</strong></p>
  
  <p><strong>git merge origin/eventdesign</strong></p>
  
  <p>But i got the following error</p>
  
  <p><strong>error: invalid object 100755 6b852b618ad4e91b4c5fe65693731f160b9fb3cb for 'packages/frozennode/administrator/css/ui/images/ui-icons_0073ea_256x240.png'</strong></p>
  
  <p><strong>fatal: git write-tree failed to write a tree</strong></p>
  
  <p>I had searched alot but can't figure it out. Any suggestion will be appriciated.</p>
  
  <p>Thanks</p>