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Bug #15440 ยป 0001-Freeze-hash-literals-embedded-in-duphash-instruction.patch

jeremyevans0 (Jeremy Evans), 12/20/2018 06:22 AM

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compile.c
hash = rb_hash_new_with_size(RARRAY_LEN(ary) / 2);
rb_hash_bulk_insert(RARRAY_LEN(ary), RARRAY_CONST_PTR_TRANSIENT(ary), hash);
rb_hash_freeze(hash);
iseq_add_mark_object_compile_time(iseq, hash);
ADD_INSN1(ret, line, duphash, hash);
}
test/ruby/test_literal.rb
assert_equal "literal", h["string"]
end
def frozen_hash_literal_arg(x={0=>1,1=>4,2=>17})
x
end
def test_hash_literal_frozen
assert_raise(FrozenError){ObjectSpace.each_object(Hash){|a| a[3] = 8 if a.class == Hash && a[0] == 1 && a[1] == 4 && a[2] == 17}}
assert frozen_hash_literal_arg[3].nil?
end
def test_big_array_and_hash_literal
assert_normal_exit %q{GC.disable=true; x = nil; raise if eval("[#{(1..1_000_000).map{'x'}.join(", ")}]").size != 1_000_000}, "", timeout: 300, child_env: %[--disable-gems]
assert_normal_exit %q{GC.disable=true; x = nil; raise if eval("[#{(1..1_000_000).to_a.join(", ")}]").size != 1_000_000}, "", timeout: 300, child_env: %[--disable-gems]
    (1-1/1)