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array.c: check position to insert

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* array.c (rb_ary_insert): check position to insert even if no
  elements to be inserted.  [ruby-core:81125] [Bug #13558]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58693 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-05-12 17:02:48 +00:00
parent 9c38f3e6c3
commit e95cac18bd
2 changed files with 2 additions and 1 deletions
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2
array.c
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@ -1781,8 +1781,8 @@ rb_ary_insert(int argc, VALUE *argv, VALUE ary)
rb_check_arity(argc, 1, UNLIMITED_ARGUMENTS);
rb_ary_modify_check(ary);
if (argc == 1) return ary;
pos = NUM2LONG(argv[0]);
if (argc == 1) return ary;
if (pos == -1) {
pos = RARRAY_LEN(ary);
}

1
test/ruby/test_array.rb
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@ -2121,6 +2121,7 @@ class TestArray < Test::Unit::TestCase
assert_equal([0], a.insert(1))
assert_equal([0, 1], a.insert(1, 1))
assert_raise(ArgumentError) { a.insert }
assert_raise(TypeError) { a.insert(Object.new) }
assert_equal([0, 1, 2], a.insert(-1, 2))
assert_equal([0, 1, 3, 2], a.insert(-2, 3))
assert_raise(RuntimeError) { [0].freeze.insert(0)}