See Lines  9733 to 9735: in emacs:  src/w32fns.c

  static int isdead = 0;

  if (isdead == 2)

This is apparently a mistake.  This sort of thing usually happens when refactoring gets screwed up.

Seems to have been there for a long time!?   Trying to guess what the original intention might have been here;

http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD


9723<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9723> /* The return code indicates key code size.  cpID is the codepage to
9724<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9724>    use for translation to Unicode; -1 means use the current console
9725<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9725>    input codepage.  */
9726<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9726> int
9727<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9727> w32_kbd_patch_key (KEY_EVENT_RECORD *event, int cpId)
9728<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9728> {
9729<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9729>   unsigned int key_code = event->wVirtualKeyCode;
9730<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9730>   unsigned int mods = event->dwControlKeyState;
9731<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9731>   BYTE keystate[256];
9732<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9732>   static BYTE ansi_code[4];
9733<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9733>   static int isdead = 0;
9734<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9734>
9735<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9735>   if (isdead == 2)
9736<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9736>     {
9737<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9737>       event->uChar.AsciiChar = ansi_code[2];
9738<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9738>       isdead = 0;
9739<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9739>       return 1;
9740<http://git.savannah.gnu.org/gitweb/?p=emacs.git;a=blob;f=src/w32fns.c;h=887e5a1f7b74550044c0be0d40fd0bebab684eb7;hb=HEAD#l9740>     }