fn check_temp_storage_budget(temp_storage: &RowArena) -> Result<(), EvalError>Expand description
Fails once temp_storage holds more than the budget it was built with.
Checked after each function call rather than inside the arena, because RowArena’s pushes are
infallible: refusing one would hand back a truncated value. Between calls is the innermost point
that can return an error, so a budgeted arena reaches at most its budget plus whatever the call
that crossed it allocated. Functions that can predict their own size cut that overshoot by
consulting crate::func::max_string_func_result_bytes first.
An unbudgeted arena, which is every arena in a dataflow, costs one branch on a None.