| error[E0499]: cannot borrow `self.buf_read` as mutable more than once at a time |
| --> $DIR/iterating-updating-mutref.rs:61:23 |
| | |
| LL | pub fn next<'a>(&'a mut self) -> &'a str { |
| | -- lifetime `'a` defined here |
| LL | loop { |
| LL | let buf = self.buf_read.fill_buf(); |
| | ^^^^^^^^^^^^^ `self.buf_read` was mutably borrowed here in the previous iteration of the loop |
| LL | if let Some(s) = decode(buf) { |
| LL | return s; |
| | - returning this value requires that `self.buf_read` is borrowed for `'a` |
| |
| error: aborting due to 1 previous error |
| |
| For more information about this error, try `rustc --explain E0499`. |
