${$} throwing syntax error when use in cat << EOF on ksh93 93u+ .

[Saikiran-m]

Solaris 11 that ship with ksh93, the following behavior is observed:

Version of ksh93 on system: ~# ksh --version version sh (AT&T Research) 93u+ 2012-08-01

The issue: echo ${$} working fine but echo ${$} throwing syntax error when use in cat << EOF.

Recreation steps followed below: Case 1: with $$ :~# echo $$ 1323 :~# cat << EOF

$$ EOF 1323

Case 2 : with ${$} :~# echo ${$} 1323 :~# cat << EOF

echo ${$} EOF /usr/bin/ksh: syntax error: `$' unexpected

[McDutchie]

For anyone else reading: This is fixed on the ksh 93u+m fork.