no longer rescue exceptions of #coerce in Integer#step

* numeric.c (num_step_negative_p): no more error hiding.
* test/ruby/test_float.rb, test/ruby/test_numeric.rb:
  follow the change. [Feature #7688]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58475 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

NEWS

@@ -28,6 +28,8 @@ with all sufficient information, see the ChangeLog file or Redmine
 * Integer
 
   * Integer.sqrt  [Feature #13219]
+  * Integer#step does no longer rescue exceptions when given
+    a step value which cannot be compared with #> to 0. [Feature #7688]
 
 * IO
 

numeric.c

@@ -446,12 +446,6 @@ coerce_failed(VALUE x, VALUE y)
 	     y, rb_obj_class(x));
 }
 
-static VALUE
-coerce_rescue_quiet(VALUE arg, VALUE errinfo)
-{
-    return Qundef;
-}
-
 static int
 do_coerce(VALUE *x, VALUE *y, int err)
 {
@@ -2585,17 +2579,11 @@ ruby_num_interval_step_size(VALUE from, VALUE to, VALUE step, int excl)
     }
 }
 
-static VALUE
-num_step_compare_with_zero(VALUE num)
-{
-    VALUE zero = INT2FIX(0);
-    return rb_check_funcall(num, '>', 1, &zero);
-}
-
 static int
 num_step_negative_p(VALUE num)
 {
     const ID mid = '<';
+    VALUE zero = INT2FIX(0);
     VALUE r;
 
     if (FIXNUM_P(num)) {
@@ -2606,7 +2594,8 @@ num_step_negative_p(VALUE num)
 	if (method_basic_p(rb_cInteger))
 	    return BIGNUM_NEGATIVE_P(num);
     }
-    r = rb_rescue(num_step_compare_with_zero, num, coerce_rescue_quiet, Qnil);
+
+    r = rb_check_funcall(num, '>', 1, &zero);
     if (r == Qundef) {
 	coerce_failed(num, INT2FIX(0));
     }

test/ruby/test_float.rb

@@ -788,7 +788,7 @@ class TestFloat < Test::Unit::TestCase
   end
 
   def test_num2dbl
-    assert_raise(TypeError) do
+    assert_raise(ArgumentError, "comparison of String with 0 failed") do
       1.0.step(2.0, "0.5") {}
     end
     assert_raise(TypeError) do

test/ruby/test_numeric.rb

@@ -261,8 +261,8 @@ class TestNumeric < Test::Unit::TestCase
     assert_raise(ArgumentError) { 1.step(10, 1, 0).size }
     assert_raise(ArgumentError) { 1.step(10, 0) { } }
     assert_raise(ArgumentError) { 1.step(10, 0).size }
-    assert_raise(TypeError) { 1.step(10, "1") { } }
-    assert_raise(TypeError) { 1.step(10, "1").size }
+    assert_raise(ArgumentError) { 1.step(10, "1") { } }
+    assert_raise(ArgumentError) { 1.step(10, "1").size }
     assert_raise(TypeError) { 1.step(10, nil) { } }
     assert_raise(TypeError) { 1.step(10, nil).size }
     assert_nothing_raised { 1.step(by: 0, to: nil) }