Strange autocompletion behavior using PATH variable with special symbol - apostroph (')

[Ilyushkin Nikita]

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-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  -D_FORTIFY_SOURCE=2 -g -O2 -fstack-protector 
--param=ssp-buffer-size=4 -Wformat -Werror=format-security -Wall
uname output: Linux Lenovo-ThinkPad-T61 3.11.0-15-generic #25-Ubuntu SMP 
Thu Jan 30 17:25:07 UTC 2014 i686 i686 i686 GNU/Linux
Machine Type: i686-pc-linux-gnu

Bash Version: 4.2
Patch Level: 45
Release Status: release

Description:
    Expanding PATH variable influence word completion, based on whether 
was apostrophes in additional path or not.

Repeat-By:
    I have an executable file (called deadbeef) with appropriate 
executable rights, the path to which contains 2 apostrophes:
 /home/mallniya/hard'n'soft/soft/gnu-linux/portable/deadbeef-0.6.0
    Specialy for an experiment I put the same file into another directory:
 /home/mallniya/hardnsoftaa/soft/gnu-linux/portable/deadbeef-0.6.0
    If I export first path to the variable PATH there will be no 
autocompletion in bash, but there will be in the second case.
    When I type in terminal first letters of program, that resides in  
exported directory:
    dead[TAB]
    There is no completion in first case, but when I use TAB with the 
same word in second condition (where there is no ' in the PATH) - it works.
    But if I type command deadbeef in first case manually - it also 
executes.
    Moreover, both which and type commands tell, that the executable 
file is exists in both cases.
    I tried to report it as bash-autocompletion bug, and that's what 
they said:
    "Seems that we (bash-completion) have nothing to do with this; 
plain vanilla bash behaves as described. See "BUG REPORTS" in the bash 
man page if you wish to report it against bash."
    So I'm here.
    Original post:
 http://askubuntu.com/questions/415043/strange-autocompletion-behavior

Fix:
    [Description of how to fix the problem.  If you don't know a
    fix for the problem, don't include this section.]