End of Life Ruby 3.1 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
IO::Buffer#external?
external?
io_buffer.c
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static VALUE
rb_io_buffer_external_p(VALUE self)
{
struct rb_io_buffer *data = NULL;
TypedData_Get_Struct(self, struct rb_io_buffer, &rb_io_buffer_type, data);
return RBOOL(data->flags & RB_IO_BUFFER_EXTERNAL);
}
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