eclipse warning: An internal error occurred during: "Computing Git status for repository MiniTools". Unexpected internal error near index ...

>PROBLEM

Any change in the project caused the following message:
  An internal error occurred during: "Computing Git status for repository MiniTools".
  Unexpected internal error near index 8
  \target\

>SOLUTION
The error comes from the backslashed used in .ignore file.
Switch the backslashes to slashes.
WRONG: \target\
RIGHT: /target/

>ENV
Git
Eclipse Mars
Windows