/* This code tries to figure out just what went wrong with

/* This code tries to figure out just what went wrong with
   gv_fetchmethod.  It therefore needs to duplicate a lot of
          the internals of that function.
"Duplicate". <snigger>. You said a naughty word. Now sanitised.

[All tests pass, but I'm not 100% confident that this code is
 equivalent in all reachable corner cases, and it may be possible
 to simplify the error reporting logic now in gv_fetchmethod_flags]

p4raw-id: //depot/perl@33702