Why it is possible to read and write to not yet opened stream?

[b0g3r]

It's a lot of questions and quirks about how to work with streams properly. One of the most popular mistakes is forgetting to use async with and therefore not closing the stream after work is done. I myself did this exact bug multiple times and had to debug stale applications 😬

But why does stream allow reads and writes to itself until it's explicitly opened? E.g. boolean flag that enables in aenter, or otherwise an exception in get and send.

[smurfix]

Hysterical raisins. The explicit create/try/read+write/finally/close loop has been around forever and still needs to be supported, esp. since sometimes it's a PITA to spawn another thread just for the async with stream block that otherwise doesn't fit your program structure without major refactoring.