2 files changed, 31 insertions, 0 deletions
diff --git a/test/t/kernel.rb b/test/t/kernel.rb
index d240e59dc..e59bd6a10 100644
--- a/test/t/kernel.rb
+++ b/test/t/kernel.rb
@@ -520,6 +520,21 @@ assert('Kernel#to_s', '15.3.1.3.46') do
   assert_equal to_s.class, String
 end
 
+assert('Kernel#to_s on primitives') do
+  begin
+    Fixnum.alias_method :to_s_, :to_s
+    Fixnum.remove_method :to_s
+
+    assert_nothing_raised do
+      # segfaults if mrb_cptr is used
+      1.to_s
+    end
+  ensure
+    Fixnum.alias_method :to_s, :to_s_
+    Fixnum.remove_method :to_s_
+  end
+end
+
 assert('Kernel.local_variables', '15.3.1.2.7') do
   a, b = 0, 1
   a += b
diff --git a/test/t/proc.rb b/test/t/proc.rb
index bc9821f7c..29530e8dd 100644
--- a/test/t/proc.rb
+++ b/test/t/proc.rb
@@ -163,3 +163,19 @@ assert('&obj call to_proc if defined') do
 
   assert_raise(TypeError){ mock(&(Object.new)) }
 end
+
+assert('initialize_copy works when initialize is removed') do
+  begin
+    Proc.alias_method(:old_initialize, :initialize)
+    Proc.remove_method(:initialize)
+
+    a = Proc.new {}
+    b = Proc.new {}
+    assert_nothing_raised do
+      a.initialize_copy(b)
+    end
+  ensure
+    Proc.alias_method(:initialize, :old_initialize)
+    Proc.remove_method(:old_initialize)
+  end
+end