1 files changed, 28 insertions, 16 deletions
diff --git a/spec/ruby/core/exception/frozen_error_spec.rb b/spec/ruby/core/exception/frozen_error_spec.rb
index f27b33295c..979ec2ff98 100644
--- a/spec/ruby/core/exception/frozen_error_spec.rb
+++ b/spec/ruby/core/exception/frozen_error_spec.rb
@@ -1,26 +1,38 @@
 require_relative '../../spec_helper'
 
 describe "FrozenError.new" do
-  ruby_version_is "2.7" do
-    it "should take optional receiver argument" do
-      o = Object.new
-      FrozenError.new("msg", receiver: o).receiver.should equal(o)
-    end
+  it "should take optional receiver argument" do
+    o = Object.new
+    FrozenError.new("msg", receiver: o).receiver.should equal(o)
   end
 end
 
 describe "FrozenError#receiver" do
-  ruby_version_is "2.7" do
-    it "should return frozen object that modification was attempted on" do
-      o = Object.new.freeze
-      begin
-        def o.x; end
-      rescue => e
-        e.should be_kind_of(FrozenError)
-        e.receiver.should equal(o)
-      else
-        raise
-      end
+  it "should return frozen object that modification was attempted on" do
+    o = Object.new.freeze
+    begin
+      def o.x; end
+    rescue => e
+      e.should be_kind_of(FrozenError)
+      e.receiver.should equal(o)
+    else
+      raise
+    end
+  end
+end
+
+describe "Modifying a frozen object" do
+  context "#inspect is redefined and modifies the object" do
+    it "returns ... instead of String representation of object" do
+      object = Object.new
+      def object.inspect; @a = 1 end
+      def object.modify; @a = 2 end
+
+      object.freeze
+
+      # CRuby's message contains multiple whitespaces before '...'.
+      # So handle both multiple and single whitespace.
+      -> { object.modify }.should raise_error(FrozenError, /can't modify frozen .*?: \s*.../)
     end
   end
 end