BUG #6155: literal definition of arrays with double qoutes leads to error

The following bug has been logged online:

Bug reference: 6155
Logged by: listar
Email address: listar(at)mail(dot)ru
PostgreSQL version: 8.4.5
Operating system: Gentoo 4.4.4-r2 p1.3, pie-0.4.5 64-bit
Description: literal definition of arrays with double qoutes leads to
error
Details:

for example:
SELECT ('{string "with" double quotes}'::text[])[1] as value;
gives:

ERROR: malformed array literal: "{string "with" double quotes}"
LINE 1: SELECT ('{string "with" double quotes}'::text[])[1] as value...
^
********** Error **********
ERROR: malformed array literal: "{string "with" double quotes}"
SQL state: 22P02
Character: 9

Expected result:
value
---------------------------
string "with" double quotes
(1 row)

I tried to escape input string in different ways, but it wasn't successful
=(

as I can understood the problem is in "switch" statement in method
"ArrayCount(...)" in file \src\backend\utils\adt\arrayfuncs.c
(that switch doesn't cover all possible cases)