io.c: warn non-nil $,

* array.c (rb_ary_join_m): warn use of non-nil $,.

* io.c (rb_output_fs_setter): warn when set to non-nil value.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@67606 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

2 files changed, 9 insertions, 5 deletions

diff --git a/spec/ruby/core/array/join_spec.rb b/spec/ruby/core/array/join_spec.rb
index 16f0dcee7a..403bae7183 100644
--- a/spec/ruby/core/array/join_spec.rb
+++ b/spec/ruby/core/array/join_spec.rb
@@ -38,11 +38,13 @@ describe "Array#join with $," do
   end
 
   after :each do
-    $, = @before_separator
+    suppress_warning {$, = @before_separator}
   end
 
   it "separates elements with default separator when the passed separator is nil" do
-    $, = "_"
-    [1, 2, 3].join(nil).should == '1_2_3'
+    suppress_warning {
+      $, = "_"
+      [1, 2, 3].join(nil).should == '1_2_3'
+    }
   end
 end
diff --git a/spec/ruby/core/array/shared/join.rb b/spec/ruby/core/array/shared/join.rb
index 0fd2e0ff9b..28b3d8c04c 100644
--- a/spec/ruby/core/array/shared/join.rb
+++ b/spec/ruby/core/array/shared/join.rb
@@ -19,8 +19,10 @@ describe :array_join_with_default_separator, shared: true do
   end
 
   it "returns a string formed by concatenating each String element separated by $," do
-    $, = " | "
-    ["1", "2", "3"].send(@method).should == "1 | 2 | 3"
+    suppress_warning {
+      $, = " | "
+      ["1", "2", "3"].send(@method).should == "1 | 2 | 3"
+    }
   end
 
   it "attempts coercion via #to_str first" do