no longer rescue exceptions of #<=> when initializing a Range

* range.c (range_init): no longer hide the user exception
  with a ArgumentError, just let the user exception go through.
* test/ruby/test_range.rb (test_new): add tests.
  [Feature #7688]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58476 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -46,6 +46,12 @@ with all sufficient information, see the ChangeLog file or Redmine
     of #coerce. Return nil in #coerce if the coercion is impossible.
     [Feature #7688]
 
+* Range
+  * Range#initialize no longer rescue exceptions when comparing begin and
+    end with #<=> and raise a "bad value for range" ArgumentError
+    but instead let the exception from the #<=> call go through.
+    [Feature #7688]
+
 * Regexp
   * Update Onigmo 6.1.1.
     * Support absent operator https://github.com/k-takata/Onigmo/issues/82

range.c

@@ -34,19 +34,6 @@ static VALUE r_cover_p(VALUE, VALUE, VALUE, VALUE);
 
 #define EXCL(r) RTEST(RANGE_EXCL(r))
 
-static VALUE
-range_failed(void)
-{
-    rb_raise(rb_eArgError, "bad value for range");
-    return Qnil;		/* dummy */
-}
-
-static VALUE
-range_check(VALUE *args)
-{
-    return rb_funcall(args[0], id_cmp, 1, args[1]);
-}
-
 static void
 range_init(VALUE range, VALUE beg, VALUE end, VALUE exclude_end)
 {
@@ -58,9 +45,9 @@ range_init(VALUE range, VALUE beg, VALUE end, VALUE exclude_end)
     if (!FIXNUM_P(beg) || !FIXNUM_P(end)) {
 	VALUE v;
 
-	v = rb_rescue(range_check, (VALUE)args, range_failed, 0);
+	v = rb_funcall(beg, id_cmp, 1, end);
 	if (NIL_P(v))
-	    range_failed();
+	    rb_raise(rb_eArgError, "bad value for range");
     }
 
     RANGE_SET_EXCL(range, exclude_end);

test/ruby/test_range.rb

@@ -9,6 +9,14 @@ class TestRange < Test::Unit::TestCase
     assert_equal((0..2), Range.new(0, 2))
     assert_equal((0..2), Range.new(0, 2, false))
     assert_equal((0...2), Range.new(0, 2, true))
+
+    assert_raise(ArgumentError) { (1.."3") }
+
+    obj = Object.new
+    def obj.<=>(other)
+      raise RuntimeError, "cmp"
+    end
+    assert_raise_with_message(RuntimeError, "cmp") { (obj..3) }
   end
 
   def test_frozen_initialize