https://git.ruby-lang.org/ruby.git/commit/?id=437ff40879

From 437ff408790d5426e0ee03a4b22171bf745471a7 Mon Sep 17 00:00:00 2001
From: Yusuke Endoh <mame@r...>
Date: Thu, 5 Sep 2019 16:54:43 +0900
Subject: C method should accept a keyword hash (for compatibility with 2.6)


diff --git a/test/ruby/test_keyword.rb b/test/ruby/test_keyword.rb
index 98e121f..5945a3b 100644
--- a/test/ruby/test_keyword.rb
+++ b/test/ruby/test_keyword.rb
@@ -261,7 +261,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L261
       end
     end
     assert_equal([], c[**{}].args)
-    assert_equal([], c[**kw].args)
+    assert_equal([{}], c[**kw].args)
     assert_equal([h], c[**h].args)
     assert_equal([h], c[a: 1].args)
     assert_equal([h2], c[**h2].args)
@@ -272,7 +272,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L272
       def initialize; end
     end
     assert_nil(c[**{}].args)
-    assert_nil(c[**kw].args)
+    assert_raise(ArgumentError) { c[**kw] }
     assert_raise(ArgumentError) { c[**h] }
     assert_raise(ArgumentError) { c[a: 1] }
     assert_raise(ArgumentError) { c[**h2] }
@@ -285,7 +285,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L285
       end
     end
     assert_raise(ArgumentError) { c[**{}] }
-    assert_raise(ArgumentError) { c[**kw] }
+    assert_equal(kw, c[**kw].args)
     assert_equal(h, c[**h].args)
     assert_equal(h, c[a: 1].args)
     assert_equal(h2, c[**h2].args)
@@ -311,7 +311,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L311
       end
     end
     assert_raise(ArgumentError) { c[**{}] }
-    assert_raise(ArgumentError) { c[**kw] }
+    assert_equal([kw, kw], c[**kw].args)
     assert_equal([h, kw], c[**h].args)
     assert_equal([h, kw], c[a: 1].args)
     assert_equal([h2, kw], c[**h2].args)
@@ -343,7 +343,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L343
       args
     end
     assert_equal([], c.method(:m)[**{}])
-    assert_equal([], c.method(:m)[**kw])
+    assert_equal([{}], c.method(:m)[**kw])
     assert_equal([h], c.method(:m)[**h])
     assert_equal([h], c.method(:m)[a: 1])
     assert_equal([h2], c.method(:m)[**h2])
@@ -353,7 +353,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L353
     c.singleton_class.remove_method(:m)
     def c.m; end
     assert_nil(c.method(:m)[**{}])
-    assert_nil(c.method(:m)[**kw])
+    assert_raise(ArgumentError) { c.method(:m)[**kw] }
     assert_raise(ArgumentError) { c.method(:m)[**h] }
     assert_raise(ArgumentError) { c.method(:m)[a: 1] }
     assert_raise(ArgumentError) { c.method(:m)[**h2] }
@@ -365,7 +365,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L365
       args
     end
     assert_raise(ArgumentError) { c.method(:m)[**{}] }
-    assert_raise(ArgumentError) { c.method(:m)[**kw] }
+    assert_equal(kw, c.method(:m)[**kw])
     assert_equal(h, c.method(:m)[**h])
     assert_equal(h, c.method(:m)[a: 1])
     assert_equal(h2, c.method(:m)[**h2])
@@ -389,7 +389,7 @@ class TestKeywordArguments < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_keyword.rb#L389
       [arg, args]
     end
     assert_raise(ArgumentError) { c.method(:m)[**{}] }
-    assert_raise(ArgumentError) { c.method(:m)[**kw] }
+    assert_equal([kw, kw], c.method(:m)[**kw])
     assert_equal([h, kw], c.method(:m)[**h])
     assert_equal([h, kw], c.method(:m)[a: 1])
     assert_equal([h2, kw], c.method(:m)[**h2])
diff --git a/vm_insnhelper.c b/vm_insnhelper.c
index f8d68cc..8435948 100644
--- a/vm_insnhelper.c
+++ b/vm_insnhelper.c
@@ -2227,7 +2227,7 @@ vm_call_cfunc(rb_execution_context_t *ec, rb_control_frame_t *reg_cfp, struct rb https://github.com/ruby/ruby/blob/trunk/vm_insnhelper.c#L2227
 {
     RB_DEBUG_COUNTER_INC(ccf_cfunc);
 
-    CALLER_SETUP_ARG(reg_cfp, calling, ci, 1);
+    CALLER_SETUP_ARG(reg_cfp, calling, ci, 0);
     return vm_call_cfunc_with_frame(ec, reg_cfp, calling, ci, cc);
 }
 
-- 
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