pp_sort: add missing CX_LEAVE_SCOPE()

The branch that does POPSUB has an implicit CX_LEAVE_SCOPE; the
other branch didn't; do add one for consistency. It's fairly harmless,
as pp_sort shortly afterwards does a LEAVE() anyway.

Also add an assertion to POPBLOCK that the save stack has been popped;
this is how I discovered the sort issue in the first place.

1 files changed, 1 insertions, 0 deletions

diff --git a/pp_sort.c b/pp_sort.c
index 47d4a064a2..5cab1292da 100644
--- a/pp_sort.c
+++ b/pp_sort.c
@@ -1718,6 +1718,7 @@ PP(pp_sort)
             else
                 assert(CxTYPE(cx) == CXt_NULL);
                 /* mimic POPSUB */
+                CX_LEAVE_SCOPE(cx);
                 PL_tmps_floor = cx->cx_u.cx_blk.blku_old_tmpsfloor;
 
 	    POPBLOCK(cx);