Merging
    5.004_02
    5.004_03
    5.004_04
    oneperl (THIS pointer)

Multi-threading
    without USE_THREADS, change extern variable for dTHR
    consistent semantics for exit/die in threads
    pp_entersub still cloning XSUBs (broken)?
    test '~'-magic thread addresses
    test new thread state flags, DESTROY etc.
    SvREFCNT_dec(curstack) in threadstart() in Thread.xs
    per-thread GV -> [SAH]V dereference for $@ etc.
    Thread::Pool
    check new condition variable word; fix cond.t
    more Configure support

Miscellaneous
    rename and alter ISA.pm

Compiler
    auto-produce executable
    typed lexicals should affect B::CC::load_pad
    workarounds to help Win32
    $^C to track compiler/checker status
    END blocks need saving in compiled output
    _AUTOLOAD prodding

Documentation
    lots