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string.c: enable capacity when setting capa

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* string.c (rb_str_modify_expand): enable capacity and disable
  assocation with packed objects when setting capa, so that
  pack("p") string fails to unpack properly after modified.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44803 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-02-04 03:55:32 +00:00
parent 5b92c0bea3
commit bebc52a4a7
3 changed files with 8 additions and 0 deletions
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test/ruby/test_pack.rb
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@ -181,6 +181,7 @@ class TestPack < Test::Unit::TestCase
assert_equal a[0], a.pack("p").unpack("p")[0]
assert_equal a, a.pack("p").freeze.unpack("p*")
assert_raise(ArgumentError) { (a.pack("p") + "").unpack("p*") }
assert_raise(ArgumentError) { (a.pack("p") << "d").unpack("p*") }
end
def test_format_string_modified