bash - Why extglob except breaking except condition? -

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i run in debian 8.1, gnu bash, version 4.3.30(1)-release (x86_64-pc-linux-gnu) , lenovo g50-30 500 gb ssd , 8 gb flash memory:

shopt -s extglob cp -r !(backups.backupdb/) /home/masi/documents/

but copy directory backups.backupdb/, confirmed @ end of copying.

messages during copying process

after 2h copying

cp: cannot stat ‘backups.backupdb/masi\’s macbook air/2015-06-25-233115/macintosh hd/system/library/image capture/automatic tasks/makepdf.app/contents/resources/ko.lproj/3x5로 자르기.mkpdf’: no such file or directory cp: cannot stat ‘backups.backupdb/masi\’s macbook air/2015-06-25-233115/macintosh hd/system/library/image capture/automatic tasks/makepdf.app/contents/resources/ko.lproj/3x5에 맞추기.mkpdf’: no such file or directory ... cp: cannot stat ‘camera uploads/2015-06-29 11.51.36.jpg’: invalid argument cp: cannot stat ‘camera uploads/2015-06-29 11.51.53.jpg’: invalid argument cp: cannot stat ‘camera uploads/icon\r’: invalid argument cp: cannot stat ‘cancer’: invalid argument cp: cannot stat ‘cardio bad/atria-en-ventrikels.swf’: invalid argument cp: cannot stat ‘cardio bad/extreme_90_180.swf’: invalid argument cp: cannot stat ‘cardio databases tools’: invalid argument cp: cannot stat ‘cardiology’: invalid argument ...

where keep unexpected browsing through backup folder. challenge here backups.backupdb several tbs , seeing goes browsing not feel good.

no symbolic links

i run 

ls -lr /media/masi/eb807ed8-7f45-35f8-a345-9da6692b228a/ |grep backup

getting

ls: cannot access /media/masi/eb807ed8-7f45-35f8-a345-9da6692b228a/cancer: invalid argument ls: cannot access /media/masi/eb807ed8-7f45-35f8-a345-9da6692b228a/cardio databases tools: invalid argument ls: cannot access /media/masi/eb807ed8-7f45-35f8-a345-9da6692b228a/cardiology: invalid argument drwxr-xr-x 1 root root          7 jul  8 20:25 backups.backupdb ls: cannot open directory /media/masi/eb807ed8-7f45-35f8-a345-9da6692b228a/animations/embryology/e17_files: permission denied ^c

so directory not symlink. why extglob except condition broken here browsing folder?

try removing backslash (i adding echo test purposes):

shopt -s extglob echo cp -r !(backups.backupdb) /home/masi/documents/

it works in environment (gnu bash, version 4.3.30, os x)


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