Zenity freezes

[Johnny Rosenberg]

In a terminal (things in <> are instructions, don't type those…):
$ cat > Musicians
FALSE
First Name
FALSE
Second Name
FALSE
Third Name
<Press Ctrl+d>
$ zenity --list --title "Select musicians" --text="Some text"
--column="Select" --column="Musician" --checklist --separator="\n"
--height=480 --width=370 < Musicians

The dialogue opens. Now hit OK or Cancel.

Now, sometimes this works, but most of the time the dialogue freeze.
The terminal shows the following:

(zenity:3629): GLib-WARNING **:
/build/buildd/glib2.0-2.32.3/./glib/giounix.c:411Error while getting
flags for FD: Bad file descriptor (9)


(zenity:3629): GLib-WARNING **:
/build/buildd/glib2.0-2.32.3/./glib/giounix.c:411Error while getting
flags for FD: Bad file descriptor (9)


(zenity:3629): GLib-WARNING **:
/build/buildd/glib2.0-2.32.3/./glib/giounix.c:411Error while getting
flags for FD: Bad file descriptor (9)

and so on.

Ctrl+c in the terminal cancels the dialogue.

So, what is this? User error or Zenity error? If user error, what did
I do wrong? This worked in Ubuntu 10.10, at least better than in
Ubuntu 12.04. I think I remember that it freeze in Ubuntu 10.10 too,
but not almost every time, like it does in Ubuntu 12.04.


Kind regards

Johnny Rosenberg
ジョニー・ローゼンバーグ