diff options
| -rw-r--r-- | io_buffer.c | 1 | ||||
| -rw-r--r-- | test/ruby/test_io_buffer.rb | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/io_buffer.c b/io_buffer.c index e6ca61bdae..2e789abe0f 100644 --- a/io_buffer.c +++ b/io_buffer.c @@ -1532,6 +1532,7 @@ rb_io_buffer_slice(struct rb_io_buffer *buffer, VALUE self, size_t offset, size_ struct rb_io_buffer *slice = NULL; TypedData_Get_Struct(instance, struct rb_io_buffer, &rb_io_buffer_type, slice); + slice->flags |= (buffer->flags & RB_IO_BUFFER_READONLY); slice->base = (char*)buffer->base + offset; slice->size = length; diff --git a/test/ruby/test_io_buffer.rb b/test/ruby/test_io_buffer.rb index 7a58ec0c5a..7087a2b957 100644 --- a/test/ruby/test_io_buffer.rb +++ b/test/ruby/test_io_buffer.rb @@ -236,6 +236,18 @@ class TestIOBuffer < Test::Unit::TestCase end end + def test_slice_readonly + hello = %w"Hello World".join(" ").freeze + buffer = IO::Buffer.for(hello) + slice = buffer.slice + assert_predicate slice, :readonly? + assert_raise IO::Buffer::AccessError do + # This breaks the literal in string pool and many other tests in this file. + slice.set_string("Adios", 0, 5) + end + assert_equal "Hello World", hello + end + def test_locked buffer = IO::Buffer.new(128, IO::Buffer::INTERNAL|IO::Buffer::LOCKED) |