fix bogus OPf_REF context for the BLOCK in C<grep BLOCK @foo>

(sometimes caused bizarreness in the BLOCK)

p4raw-id: //depot/perl@3180

1 files changed, 31 insertions, 0 deletions

diff --git a/t/op/grep.t b/t/op/grep.t
new file mode 100755
index 0000000000..45d0e25a27
--- /dev/null
+++ b/t/op/grep.t
@@ -0,0 +1,31 @@
+#!./perl
+
+#
+# grep() and map() tests
+#
+
+print "1..3\n";
+
+$test = 1;
+
+sub ok {
+    my ($got,$expect) = @_;
+    print "# expected [$expect], got [$got]\nnot " if $got ne $expect;
+    print "ok $test\n";
+}
+
+{
+   my @lol = ([qw(a b c)], [], [qw(1 2 3)]);
+   my @mapped = map  {scalar @$_} @lol;
+   ok "@mapped", "3 0 3";
+   $test++;
+
+   my @grepped = grep {scalar @$_} @lol;
+   ok "@grepped", "$lol[0] $lol[2]";
+   $test++;
+
+   @grepped = grep { $_ } @mapped;
+   ok "@grepped", "3 3";
+   $test++;
+}
+