[inseparable changes from patch from perl5.003_24 to perl5.003_25]perl-5.003_25

 CORE LANGUAGE CHANGES

Subject: Make $] read-only
From: Chip Salzenberg <chip@perl.com>
Files: gv.c

Subject: New variable C<$^S> is a native version of C<$?>
From: Chip Salzenberg <chip@perl.com>
Files: doio.c global.sym gv.c interp.sym lib/English.pm mg.c perl.c perl.h pod/perldelta.pod pod/perlfunc.pod pod/perlvar.pod pp_ctl.c pp_sys.c proto.h util.c

Subject: Make $^T work with undump, and don't taint it
From: Chip Salzenberg <chip@perl.com>
Files: perl.c

 CORE PORTABILITY

Subject: VMS patches for _24
Date: Fri, 31 Jan 1997 02:34:37 -0500 (EST)
From: Charles Bailey <bailey@HMIVAX.HUMGEN.UPENN.EDU>
Files: ext/DynaLoader/DynaLoader.pm ext/DynaLoader/dl_vms.xs lib/AutoSplit.pm lib/ExtUtils/MM_VMS.pm lib/ExtUtils/MakeMaker.pm perl.h pp_hot.c t/lib/filehand.t t/op/closure.t vms/Makefile vms/config.vms vms/descrip.mms vms/ext/filespec.t vms/vms.c vms/vmsish.h

    private-msgid: <01IEUIFP5038004GQP@hmivax.humgen.upenn.edu>

 DOCUMENTATION

Subject: Document how extension pms go in $archlib
From: Chip Salzenberg <chip@perl.com>
Files: pod/perldelta.pod

Subject: perlfunc.pod tweaks
Date: Thu, 30 Jan 1997 16:20:55 -0500
From: Roderick Schertler <roderick@gate.net>
Files: pod/perlfunc.pod

    private-msgid: <20526.854659255@eeyore.ibcinc.com>

Subject: Error lines must not have trailing periods
From: Chip Salzenberg <chip@perl.com>
Files: pod/perldiag.pod

 LIBRARY AND EXTENSIONS

Subject: Make IO::Handle::gets() an alias of getline
Date: Thu, 30 Jan 1997 12:03:15 +0100
From: Gisle Aas <aas@bergen.sn.no>
Files: ext/IO/lib/IO/Handle.pm lib/IO/Handle.pm

    private-msgid: <199701301103.MAA11291@bergen.sn.no>

 OTHER CORE CHANGES

Subject: Require '-T' in argv[], not just on #! line
From: Chip Salzenberg <chip@perl.com>
Files: perl.c pod/perldiag.pod

Subject: Fix C<return @_> and associated stack bugs
From: Chip Salzenberg <chip@perl.com>
Files: cop.h pp_ctl.c pp_hot.c t/op/misc.t

Subject: Fix never-closing handle after C<select>
From: Chip Salzenberg <chip@perl.com>
Files: pp_sys.c

Subject: Fix /\G/g with patterns that match empty string
From: Ilya Zakharevich <ilya@math.ohio-state.edu>
Files: pp_hot.c

Subject: Don't create AV, HV, IO when assigning glob
From: Chip Salzenberg <chip@perl.com>
Files: mg.c

 TESTS

Subject: More Amiga test patches
Date: Wed, 29 Jan 1997 16:07:33 +0100
From: "Norbert Pueschel" <pueschel@imsdd.meb.uni-bonn.de>
Files: README.amiga t/lib/safe2.t t/op/closure.t

    private-msgid: <77724725@Armageddon.meb.uni-bonn.de>

1 files changed, 30 insertions, 19 deletions

diff --git a/cop.h b/cop.h
index d450e09b01..501faac80e 100644
--- a/cop.h
+++ b/cop.h
@@ -46,23 +46,26 @@ struct block_sub {
 	cx->blk_sub.dfoutgv = defoutgv;					\
 	(void)SvREFCNT_inc(cx->blk_sub.dfoutgv)
 
-/* We muck with cxstack_ix since _dec may call a DESTROY, overwriting cx. */
-
 #define POPSUB(cx)							\
-	if (cx->blk_sub.hasargs) {					\
+	{ struct block_sub cxsub;					\
+	  POPSUB1(cx);							\
+	  POPSUB2(); }
+
+#define POPSUB1(cx)							\
+	cxsub = cx->blk_sub;	/* because DESTROY may clobber *cx */
+
+#define POPSUB2()							\
+	if (cxsub.hasargs) {						\
 	    /* put back old @_ */					\
 	    SvREFCNT_dec(GvAV(defgv));					\
-	    GvAV(defgv) = cx->blk_sub.savearray;			\
+	    GvAV(defgv) = cxsub.savearray;				\
 	    /* destroy arg array */					\
-	    av_clear(cx->blk_sub.argarray);				\
-	    AvREAL_off(cx->blk_sub.argarray);				\
+	    av_clear(cxsub.argarray);					\
+	    AvREAL_off(cxsub.argarray);					\
 	}								\
-	if (cx->blk_sub.cv) {						\
-	    if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) {	\
-		cxstack_ix++;						\
-		SvREFCNT_dec((SV*)cx->blk_sub.cv);			\
-		cxstack_ix--;						\
-	    }								\
+	if (cxsub.cv) {							\
+	    if (!(CvDEPTH(cxsub.cv) = cxsub.olddepth))			\
+		SvREFCNT_dec(cxsub.cv);					\
 	}
 
 #define POPFORMAT(cx)							\
@@ -117,14 +120,22 @@ struct block_loop {
 	cx->blk_loop.iterix = -1;
 
 #define POPLOOP(cx)							\
-	newsp		= stack_base + cx->blk_loop.resetsp;		\
-	SvREFCNT_dec(cx->blk_loop.iterlval);				\
-	if (cx->blk_loop.itervar) {					\
-	    SvREFCNT_dec(*cx->blk_loop.itervar);			\
-	    *cx->blk_loop.itervar = cx->blk_loop.itersave;		\
+	{ struct block_loop cxloop;					\
+	  POPLOOP1(cx);							\
+	  POPLOOP2(); }
+
+#define POPLOOP1(cx)							\
+	cxloop = cx->blk_loop;	/* because DESTROY may clobber *cx */
+
+#define POPLOOP2()							\
+	newsp = stack_base + cxloop.resetsp;				\
+	SvREFCNT_dec(cxloop.iterlval);					\
+	if (cxloop.itervar) {						\
+	    SvREFCNT_dec(*cxloop.itervar);				\
+	    *cxloop.itervar = cxloop.itersave;				\
 	}								\
-	if (cx->blk_loop.iterary && cx->blk_loop.iterary != curstack)	\
-	    SvREFCNT_dec(cx->blk_loop.iterary);
+	if (cxloop.iterary && cxloop.iterary != curstack)		\
+	    SvREFCNT_dec(cxloop.iterary);
 
 /* context common to subroutines, evals and loops */
 struct block {