Bug when changing the directory to a removed parent one

[Jesús Malo Poyatos]

Configuration Information [Automatically generated, do not change]:
Machine: i586
OS: linux-gnu
Compiler: gcc -I/usr/src/packages/BUILD/bash-3.1 
-L/usr/src/packages/BUILD/bash-3.1/../readline-5.1
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i586' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i586-suse-linux-gnu' 
-DCONF_VENDOR='suse' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -march=i586 -mtune=i686 
-fmessage-length=0 -Wall -D_FORTIFY_SOURCE=2 -g -D_GNU_SOURCE -DRECYCLES_PIDS 
-Wall -pipe -g -fPIE -fbranch-probabilities
uname output: Linux bscib04 2.6.18.8-0.3-default #1 SMP Tue Apr 17 08:42:35 UTC 
2007 i686 i686 i386 GNU/Linux
Machine Type: i586-suse-linux-gnu

Bash Version: 3.1
Patch Level: 17
Release Status: release

Description:
        When the directory parent of the current one is removed, the shell 
presents a strange behaviour. Instead of changing to the existing part, it 
concatenates the ".." to the current working directory.

Repeat-By:
        I've put the sequence of steps that I used. It also includes the system 
answer.

        jmalo@bscib04:/tmp> mkdir parent
        jmalo@bscib04:/tmp> mkdir parent/child
        jmalo@bscib04:/tmp> cd parent/child/
        jmalo@bscib04:/tmp/parent/child> rm -rf ../../parent/
        jmalo@bscib04:/tmp/parent/child> cd ..
        cd: error retrieving current directory: getcwd: cannot access parent 
directories: No existe el fichero o el directorio
        jmalo@bscib04:/tmp/parent/child/..> ls -a
        jmalo@bscib04:/tmp/parent/child/..>

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