@+, @- readonly (was Re: @<punct> interpolating in "")

Message-Id: <E13OEII-0007B2-00@libra.cus.cam.ac.uk>

p4raw-id: //depot/perl@6615

1 files changed, 25 insertions, 1 deletions

diff --git a/t/op/pat.t b/t/op/pat.t
index fbc234b74d..91c4b7d58f 100755
--- a/t/op/pat.t
+++ b/t/op/pat.t
@@ -4,7 +4,7 @@
 # the format supported by op/regexp.t.  If you want to add a test
 # that does fit that format, add it to op/re_tests, not here.
 
-print "1..216\n";
+print "1..220\n";
 
 BEGIN {
     chdir 't' if -d 't';
@@ -693,6 +693,30 @@ print "not "
 print "ok $test\n";
 $test++;
 
+eval { $+[0] = 13; };
+print "not " 
+   if $@ !~ /^Modification of a read-only value attempted/;
+print "ok $test\n";
+$test++;
+
+eval { $-[0] = 13; };
+print "not " 
+   if $@ !~ /^Modification of a read-only value attempted/;
+print "ok $test\n";
+$test++;
+
+eval { @+ = (7, 6, 5); };
+print "not " 
+   if $@ !~ /^Modification of a read-only value attempted/;
+print "ok $test\n";
+$test++;
+
+eval { @- = qw(foo bar); };
+print "not " 
+   if $@ !~ /^Modification of a read-only value attempted/;
+print "ok $test\n";
+$test++;
+
 /.(a)(ba*)?/;
 print "#$#-..$#+\nnot " if $#+ != 2 or $#- != 1;
 print "ok $test\n";