Only use ucs4 for regex engine internal strings; encode normal ones as PAST::Compiler does.
Only use ucs4 for regex engine internal strings; encode normal ones as PAST::Compiler does.

cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp,cygx/nqp