Window2012R2: initdb error: "The current directory is invalid."

Hi all,

I have failed in execute initdb in "c:\Windows\Temp\dir" folder as
reproduce logs below. The OS's messages "The current directory is invalid."
was returned.

I think it is a specification of Window2012R2 (because i could not reproduce
In Windows 7) but not PostgreSQL's problem.
But is it need to be do something in PostgreSQL sir?

I found that the ERROR messages produced when bootstrap_template1 (initdb.c)
execute PG_CMD_OPEN (_popen function).
_popen not failed but OS produced "The current directory is invalid." message,
postgres did not start, and _pclose is returned with 1 make initdb failed.

May be, Window2012R2 does not permit to execute postgres command with
none privilege permission in this case, I think so.

--- Reproduce Environment ---
OS: Window2012R2
PostgreSQL: 9.5
Command: initdb
Execute User: Administrator
Execute folder: c:\Windows\Temp\dir
-------------------

--- Reproduce log ---
c:\Windows\Temp>mkdir dir
c:\Windows\Temp>cd dir
c:\Windows\Temp\dir>
c:\Windows\Temp\dir>cmd /c ""C:\Program Files\PostgreSQL\9.5\bin\initdb" --locale=C -D "c:\testdb" -d -n"
Running in debug mode.
Running in noclean mode. Mistakes will not be cleaned up.
Running in debug mode.
Running in noclean mode. Mistakes will not be cleaned up.
The files belonging to this database system will be owned by user "Administrator".
This user must also own the server process.

VERSION=9.5.0
PGDATA=c:/testdb
share_path=C:/Program Files/PostgreSQL/9.5/share
PGPATH=C:/Program Files/PostgreSQL/9.5/bin
POSTGRES_SUPERUSERNAME=Administrator
POSTGRES_BKI=C:/Program Files/PostgreSQL/9.5/share/postgres.bki
POSTGRES_DESCR=C:/Program Files/PostgreSQL/9.5/share/postgres.description
POSTGRES_SHDESCR=C:/Program Files/PostgreSQL/9.5/share/postgres.shdescription
POSTGRESQL_CONF_SAMPLE=C:/Program Files/PostgreSQL/9.5/share/postgresql.conf.sample
PG_HBA_SAMPLE=C:/Program Files/PostgreSQL/9.5/share/pg_hba.conf.sample
PG_IDENT_SAMPLE=C:/Program Files/PostgreSQL/9.5/share/pg_ident.conf.sample
The database cluster will be initialized with locale "C".
The default database encoding has accordingly been set to "SQL_ASCII".
The default text search configuration will be set to "english".

Data page checksums are disabled.

creating directory c:/testdb ... ok
creating subdirectories ... ok
selecting default max_connections ... 10
selecting default shared_buffers ... 400kB
selecting dynamic shared memory implementation ... windows
creating configuration files ... ok
creating template1 database in c:/testdb/base/1 ... The current directory is invalid.
child process exited with exit code 1
initdb: data directory "c:/testdb" not removed at user's request

c:\Windows\Temp\dir>
---

Best regards,
Dang Minh Huong
NEC Solution Innovators, Ltd.
http://www.nec-solutioninnovators.co.jp/en/