grep ... no matching data -I

$grep  -r deactivates  *
grep: trash4: No such file or directory
grep: warning: X11/X11: recursive directory loop

Binary file X11/zile matches
grep: X11/trash4: No such file or directory
Binary file zile matches
$grep -I  -r deactivates  *
grep: trash4: No such file or directory
grep: warning: X11/X11: recursive directory loop

grep: X11/trash4: No such file or directory
ahiliation:~$pwd
/usr/bin
$

-I option

Process a binary file as if it did not contain matching data; this is equivalent to the --binary-files=without-match option.

source : debian manual for grep.