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be3baa4380
* string.c (rb_str_set_len): The buffer overflow check is wrong. The
space for termlen is allocated outside the capacity returned by
rb_str_capacity(). This fixes r41920 ("string.c: multi-byte
terminator", 2013-07-11). [ruby-core:77257] [Bug #12757]
* test/-ext-/string/test_set_len.rb (test_capacity_equals_to_new_size):
Test for this change. Applying only the test will trigger [BUG].
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56148 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
35 lines
842 B
Ruby
35 lines
842 B
Ruby
# frozen_string_literal: false
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require 'test/unit'
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require "-test-/string"
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class Test_StrSetLen < Test::Unit::TestCase
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def setup
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@s0 = [*"a".."z"].join("").freeze
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@s1 = Bug::String.new(@s0)
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end
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def teardown
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orig = [*"a".."z"].join("")
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assert_equal(orig, @s0)
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end
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def test_non_shared
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@s1.modify!
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assert_equal("abc", @s1.set_len(3))
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end
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def test_shared
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assert_raise(RuntimeError) {
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assert_equal("abc", @s1.set_len(3))
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}
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end
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def test_capacity_equals_to_new_size
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bug12757 = "[ruby-core:77257] [Bug #12757]"
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# fill to ensure capacity does not decrease with force_encoding
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str = Bug::String.new("\x00" * 128, capacity: 128)
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str.force_encoding("UTF-32BE")
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assert_equal 128, Bug::String.capacity(str)
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assert_equal 127, str.set_len(127).bytesize, bug12757
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end
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end
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