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class.c: no fstring singleton class

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* class.c (singleton_class_of): prohibit fstrings from creating
  singleton classes.
  temporary measure for [ruby-dev:49867] [Bug #12923]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56747 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-11-12 09:43:05 +00:00
parent 2c0d3e2a2e
commit ee160e68f9
2 changed files with 12 additions and 0 deletions
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3
class.c
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@ -1602,6 +1602,9 @@ singleton_class_of(VALUE obj)
switch (BUILTIN_TYPE(obj)) {
case T_FLOAT: case T_BIGNUM: case T_SYMBOL:
goto no_singleton;
case T_STRING:
if (FL_TEST_RAW(obj, RSTRING_FSTR)) goto no_singleton;
break;
}
}

9
test/-ext-/string/test_fstring.rb
View file

@ -1,8 +1,11 @@
# frozen_string_literal: false
require 'test/unit'
require '-test-/string'
require_relative '../symbol/noninterned_name'
class Test_String_Fstring < Test::Unit::TestCase
include Test_Symbol::NonInterned
def assert_fstring(str)
fstr = Bug::String.fstring(str)
yield str
@ -54,6 +57,12 @@ class Test_String_Fstring < Test::Unit::TestCase
assert_fstring(str) {|s| assert_send([s, :respond_to?, :foo])}
end
def test_singleton_class
str = noninterned_name.force_encoding("us-ascii")
fstr = Bug::String.fstring(str)
assert_raise(RuntimeError) {fstr.singleton_class}
end
class S < String
end