Make yield in singleton class definitions in methods a SyntaxError

This behavior was deprecated in 2.7 and scheduled to be removed
in 3.0.

Calling yield in a class definition outside a method is now a
SyntaxError instead of a LocalJumpError, as well.

1 files changed, 9 insertions, 1 deletions

diff --git a/spec/ruby/language/class_spec.rb b/spec/ruby/language/class_spec.rb
index 88b7a6a74f..2b9a4afef7 100644
--- a/spec/ruby/language/class_spec.rb
+++ b/spec/ruby/language/class_spec.rb
@@ -285,7 +285,7 @@ describe "A class definition extending an object (sclass)" do
     }.should raise_error(TypeError)
   end
 
-  ruby_version_is ""..."3.0" do
+  ruby_version_is ""..."2.8" do
     it "allows accessing the block of the original scope" do
       suppress_warning do
         ClassSpecs.sclass_with_block { 123 }.should == 123
@@ -293,6 +293,14 @@ describe "A class definition extending an object (sclass)" do
     end
   end
 
+  ruby_version_is "2.8" do
+    it "does not allow accessing the block of the original scope" do
+      -> {
+        ClassSpecs.sclass_with_block { 123 }
+      }.should raise_error(SyntaxError)
+    end
+  end
+
   it "can use return to cause the enclosing method to return" do
     ClassSpecs.sclass_with_return.should == :inner
   end