aptitude 產生兩次輸出

很長一段時間，我從 aptitude 獲得了一些消息的雙重輸出。這是一個例子：

> sudo aptitude install mpw
Couldn't find package "mpw".  However, the following
packages contain "mpw" in their name:
 stumpwm 
Couldn't find package "mpw".  However, the following
packages contain "mpw" in their name:
 stumpwm 
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 1019 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.

不過，並非每條消息都會發生這種情況：

> sudo aptitude install mpv
No packages will be installed, upgraded, or removed.
0 packages upgraded, 0 newly installed, 0 to remove and 1019 not upgraded.
Need to get 0 B of archives. After unpacking 0 B will be used.

這是我的 aptitude 版本：

> aptitude --version
aptitude 0.6.8.2 compiled at Nov  5 2012 06:20:41
Compiler: g++ 4.7.2
Compiled against:
 apt version 4.12.0
 NCurses version 5.9
 libsigc++ version: 2.2.10
 Ept support enabled.
 Gtk+ support disabled.
 Qt support disabled.

Current library versions:
 NCurses version: ncurses 5.9.20130608
 cwidget version: 0.5.16
 Apt version: 4.12.0

我該如何解決？

我幾乎忘記了：據我所知，我注意到雙倍的消息正是錯誤。所以也許這與stderr有關？

這是在 debian 測試/不穩定。

這看起來像Debian 錯誤 498239：警告，狀態列印兩次，2008 年 9 月 8 日送出。

有趣的好奇心：同一使用者報告了四次相同的錯誤。:-)

引用自：https://unix.stackexchange.com/questions/93186