Depends on your object. Hopefully, no. To build on your example with files, you can get I/O errors (disk full, disk has a hole in it, etc.) while flushing data

Depends on your object. Hopefully, no. To build on your example with files, you can get I/O errors (disk full, disk has a hole in it, etc.) while flushing data, if your file is buffered. (Which is the common case.)