https://git.ruby-lang.org/ruby.git/commit/?id=1ddc719a56

From 1ddc719a562b1ee4c3ae6cf4d1f6c386e142b087 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Mon, 27 Jan 2020 16:12:15 +0900
Subject: Check the encoding of `half:` option


diff --git a/numeric.c b/numeric.c
index 2471f9b..c880199 100644
--- a/numeric.c
+++ b/numeric.c
@@ -233,6 +233,7 @@ rb_num_get_rounding_option(VALUE opts) https://github.com/ruby/ruby/blob/trunk/numeric.c#L233
 	    str = rb_check_string_type(rounding);
 	    if (NIL_P(str)) goto invalid;
 	}
+        rb_must_asciicompat(str);
 	s = RSTRING_PTR(str);
 	switch (RSTRING_LEN(str)) {
 	  case 2:
diff --git a/test/ruby/test_float.rb b/test/ruby/test_float.rb
index 7cbf3b5..a94bbce 100644
--- a/test/ruby/test_float.rb
+++ b/test/ruby/test_float.rb
@@ -764,6 +764,9 @@ class TestFloat < Test::Unit::TestCase https://github.com/ruby/ruby/blob/trunk/test/ruby/test_float.rb#L764
     assert_raise_with_message(ArgumentError, /xxx/) {
       1.0.round(half: "\0xxx")
     }
+    assert_raise_with_message(Encoding::CompatibilityError, /ASCII incompatible/) {
+      1.0.round(half: "up".force_encoding("utf-16be"))
+    }
   end
 
   def test_Float
-- 
cgit v0.10.2


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