Re: Strange segfault

Message-ID: <20040305151353.5f3e913c@r2d2>

p4raw-id: //depot/perl@22443

diff --git a/pp_ctl.c b/pp_ctl.c
index fa2c87c..fd98698 100644 (file)
--- a/pp_ctl.c
+++ b/pp_ctl.c
@@ -1056,6 +1056,7 @@ PP(pp_flip)
    an exception for .."0" [#18165]). AMS 20021031. */
 
 #define RANGE_IS_NUMERIC(left,right) ( \
+       (!SvOK(left) && !SvOK(right)) || \
        SvNIOKp(left)  || (SvOK(left)  && !SvPOKp(left))  || \
        SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
        (looks_like_number(left) && SvPOKp(left) && *SvPVX(left) != '0' && \
@@ -1797,8 +1798,11 @@ PP(pp_enteriter)
                 cx->blk_loop.iterix = SvIV(sv);
                 cx->blk_loop.itermax = SvIV((SV*)cx->blk_loop.iterary);
            }
-           else
+           else {
+               STRLEN n_a;
                cx->blk_loop.iterlval = newSVsv(sv);
+               SvPV_force(cx->blk_loop.iterlval,n_a);
+           }
        }
     }
     else {

diff --git a/t/op/range.t b/t/op/range.t
index d54c96d..d92be7a 100755 (executable)
--- a/t/op/range.t
+++ b/t/op/range.t
@@ -1,6 +1,6 @@
 #!./perl
 
-print "1..25\n";
+print "1..30\n";
 
 print join(':',1..5) eq '1:2:3:4:5' ? "ok 1\n" : "not ok 1\n";
 
@@ -89,3 +89,19 @@ print join(":","".."B") eq '' ? "ok 22\n" : "not ok 22\n";
 print join(":",undef.."B") eq '' ? "ok 23\n" : "not ok 23\n";
 print join(":","B".."") eq '' ? "ok 24\n" : "not ok 24\n";
 print join(":","B"..undef) eq '' ? "ok 25\n" : "not ok 25\n";
+
+# undef..undef used to segfault and should be 0..0
+print join(":",undef..undef) eq '0' ? "ok 26\n" : "not ok 26\n";
+
+# also test undef in foreach loops
+@foo=(); push @foo, $_ for undef..2;
+print join(":",@foo) eq '0:1:2' ? "ok 27\n" : "not ok 27\n";
+
+@foo=(); push @foo, $_ for -2..undef;
+print join(":",@foo) eq '-2:-1:0' ? "ok 28\n" : "not ok 28\n";
+
+@foo=(); push @foo, $_ for undef.."B";
+print join(":",@foo) eq '' ? "ok 29\n" : "not ok 29\n";
+
+@foo=(); push @foo, $_ for "B"..undef;
+print join(":",@foo) eq '' ? "ok 30\n" : "not ok 30\n";