Routine problem when compiling after a git fetch&rebase:

[<m>/<n>] ACTION Copying ui_test.pak into en-US.pak
...
FAILED: cd ../../ui/resources; python ../../build/cp.py ../../out/Release/ui_test.pak ../../out/Release/ui/en-US.pak
Traceback (most recent call last):
  File "../../build/cp.py", line 23, in <module>
    sys.exit(Main(sys.argv[1], sys.argv[2]))
  File "../../build/cp.py", line 19, in Main
    return shutil.copy(src, os.path.normpath(dst))
  File "/usr/lib/python2.7/shutil.py", line 119, in copy
    copyfile(src, dst)
  File "/usr/lib/python2.7/shutil.py", line 69, in copyfile
    raise Error("`%s` and `%s` are the same file" % (src, dst))
shutil.Error: `../../out/Release/ui_test.pak` and `../../out/Release/ui/en-US.pak` are the same file