mysql command line password option failing

mysql.exe option to request password on execution no longer working under 5.3.30.

Observed behavior:

C:\Web\db>mysql.exe -u root -p < dbdata.sql
Enter password:
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: NO)
(no pause at Enter Password: and command fails)

Expected behavior (true thru 5.5.29):

C:\Web\db>mysql.exe -u root -p < dbdata.sql
Enter password: ******** (pauses, allowing password entry)
(command processes .sql file)

mysql.exe command fails unless noting after -p or include password (-pPASSWORD).

May be related to ctrl-c password field change introduced in 5.3.30 (see MDEV-4021 & Revision #3665).