Update to ruby/spec@b6b7752

spec/ruby/core/kernel/proc_spec.rb

@@ -36,27 +36,31 @@ describe "Kernel.proc" do
 end
 
 describe "Kernel#proc" do
+  def some_method
+    proc
+  end
+
   ruby_version_is ""..."2.7" do
     it "uses the implicit block from an enclosing method" do
-      def some_method
-        proc
-      end
-
       prc = some_method { "hello" }
 
       prc.call.should == "hello"
     end
   end
 
-  ruby_version_is "2.7" ... "2.8" do
+  ruby_version_is "2.7"..."2.8" do
     it "can be created when called with no block" do
-      def some_method
-        proc
-      end
-
       -> {
         some_method { "hello" }
       }.should complain(/Capturing the given block using Kernel#proc is deprecated/)
     end
   end
+
+  ruby_version_is "2.8" do
+    it "raises an ArgumentError when passed no block" do
+      -> {
+        some_method { "hello" }
+      }.should raise_error(ArgumentError, 'tried to create Proc object without a block')
+    end
+  end
 end