convert *usa formatted varying string bombs at v5r4

can someone confirm that this code bombs on their system? The following
code converts from character to date. Each of the %date functions work for
me except the last one. Converting from varying to date when the date
format is *USA.

** --------------------- ConvertTester --------------------------
** test conversion of string to date.
pConvertTester b
dConvertTester pi

d ch30 s 30a
d dt1 s d
d vary30 s 30a varying
/free
// convert character date in *iso format.
vary30 = '2012-10-01' ;
ch30 = vary30 ;
dt1 = %date(ch30:*iso) ;
dt1 = %date(vary30:*iso) ;

// convert character date in *usa format.
vary30 = '10/1/2012' ;
ch30 = vary30 ;
dt1 = %date(ch30:*usa) ;

// this bombs.
dt1 = %date(vary30:*usa) ;

/end-free
p e