Configuration Information [Automatically generated, do not change]:
Machine: i486
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS: -DPROGRAM='bash' -DCONF_HOSTTYPE='i486'
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i486-pc-linux-gnu'
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL
-DHAVE_CONFIG_H -I. -I../bash -I../bash/include -I../bash/lib -g -O2
uname output: Linux rain.foo 2.6.16-2-686 #2 Mon May 22 23:10:59 UTC 2006 i686
GNU/Linux
Machine Type: i486-pc-linux-gnu
Bash Version: 3.1
Patch Level: 17
Release Status: release
Description:
The builtin readline in bash inserts an unneeded newline at the
end of the prompt if the prompt is $COLUMNS * n + 1 characters.
If n is 1 and you backspace to the beginning of the line, the
prompt creeps down 1 line.
Repeat-By:
export COLUMNS;
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 1 + 0));'`;
<type some commands, backspace to beginning of line>
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 1 + 1));'`;
<type some commands, backspace to beginning of line>
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 1 + 2));'`;
<type some commands, backspace to beginning of line>
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 2 + 0));'`;
<type some commands, backspace to beginning of line>
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 2 + 1));'`;
<type some commands, backspace to beginning of line>
PS1=`perl -e 'print ( q/-/ x ($ENV{COLUMNS} * 2 + 2));'`;
<type some commands, backspace to beginning of line>
Fix:
Don't know readline internals, sorry :-/
Alexey
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