これかな。

Bash-Release: 2.05b
Patch-ID: bash205b-006

Bug-Reported-by: clowenst@ucsd.edu
Bug-Reference-ID: <156388ec.0212021151.51a48df1@posting.google.com>
Bug-Reference-URL:

Bug-Description:

When running in a locale with multibyte characters, the readline display
updater will use carriage returns when drawing the line, overwriting any
partial output already on the screen and not terminated by a newline.