eliminate cx->blk_sub.oldcomppad

In the CXt_SUB sub-struct of the context struct, there is a field
called oldcomppad. Despite the "old" in its name, this field actually
stores the value of PL_comppad of the new sub, not of the caller.

It's only use currently is in POPSUB() when abandoning a reified @_, to
locate PL_curpad[0] of the current sub in order to stick a new empty AV
there.  This is a relatively rare occurrence, and the pad slot can be
found (slightly less efficiently) from the saved CV and its depth.

1 files changed, 0 insertions, 1 deletions

diff --git a/pp_sort.c b/pp_sort.c
index ff76478758..73f520d7d4 100644
--- a/pp_sort.c
+++ b/pp_sort.c
@@ -1688,7 +1688,6 @@ PP(pp_sort)
 
 			cx->blk_sub.savearray = GvAV(PL_defgv);
 			GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
-			CX_CURPAD_SAVE(cx->blk_sub);
 			cx->blk_sub.argarray = av;
 		    }