--- perl-5.8.7/pp_sort.c.bz172587	2005-04-08 05:31:47.000000000 -0400
+++ perl-5.8.7/pp_sort.c	2005-11-07 12:57:07.000000000 -0500
@@ -1510,6 +1510,7 @@
 
     if (gimme != G_ARRAY) {
 	SP = MARK;
+	EXTEND(SP,1);
 	RETPUSHUNDEF;
     }
 
--- perl-5.8.7/pp_hot.c.bz172587	2005-04-22 10:12:27.000000000 -0400
+++ perl-5.8.7/pp_hot.c	2005-11-07 12:55:16.000000000 -0500
@@ -639,12 +639,12 @@
 	}
     }
     SP = ORIGMARK;
-    PUSHs(&PL_sv_yes);
+    XPUSHs(&PL_sv_yes);
     RETURN;
 
   just_say_no:
     SP = ORIGMARK;
-    PUSHs(&PL_sv_undef);
+    XPUSHs(&PL_sv_undef);
     RETURN;
 }
 
--- perl-5.8.7/pp_sys.c.bz172587	2005-04-27 18:12:46.000000000 -0400
+++ perl-5.8.7/pp_sys.c	2005-11-07 13:03:39.000000000 -0500
@@ -429,13 +429,16 @@
     SV *tmpsv;
     char *tmps;
     STRLEN len;
-    if (SP - MARK != 1) {
+    if (SP - MARK > 1) {
 	dTARGET;
 	do_join(TARG, &PL_sv_no, MARK, SP);
 	tmpsv = TARG;
 	SP = MARK + 1;
-    }
-    else {
+    } 
+    else if (SP == MARK ) {
+	tmpsv = &PL_sv_no;
+	EXTEND(SP, 1);
+    } else {
 	tmpsv = TOPs;
     }
     tmps = SvPV(tmpsv, len);
@@ -3517,7 +3520,7 @@
     I32 value = (I32)apply(PL_op->op_type, MARK, SP);
 
     SP = MARK;
-    PUSHi(value);
+    XPUSHi(value);
     RETURN;
 #else
     DIE(aTHX_ PL_no_func, "chown");
@@ -4127,7 +4130,7 @@
 	    if (errno != EAGAIN) {
 		value = -1;
 		SP = ORIGMARK;
-		PUSHi(value);
+		XPUSHi(value);
 		if (did_pipes) {
 		    PerlLIO_close(pp[0]);
 		    PerlLIO_close(pp[1]);
@@ -4176,7 +4179,7 @@
 		    STATUS_CURRENT = -1;
 		}
 	    }
-	    PUSHi(STATUS_CURRENT);
+	    XPUSHi(STATUS_CURRENT);
 	    RETURN;
 	}
 	if (did_pipes) {
@@ -4222,7 +4225,7 @@
     STATUS_NATIVE_SET(value);
     do_execfree();
     SP = ORIGMARK;
-    PUSHi(result ? value : STATUS_CURRENT);
+    XPUSHi(result ? value : STATUS_CURRENT);
 #endif /* !FORK or VMS */
     RETURN;
 }
@@ -4275,7 +4278,7 @@
     }
 
     SP = ORIGMARK;
-    PUSHi(value);
+    XPUSHi(value);
     RETURN;
 }
 
--- perl-5.8.7/pp.c.bz172587	2005-05-16 11:30:13.000000000 -0400
+++ perl-5.8.7/pp.c	2005-11-07 12:56:32.000000000 -0500
@@ -721,7 +721,7 @@
     while (MARK < SP)
 	do_chop(TARG, *++MARK);
     SP = ORIGMARK;
-    PUSHTARG;
+    XPUSHTARG;
     RETURN;
 }
 
@@ -739,7 +739,7 @@
 
     while (SP > MARK)
 	count += do_chomp(POPs);
-    PUSHi(count);
+    XPUSHi(count);
     RETURN;
 }