src/test/ui/suggestions/mut-borrow-needed-by-trait.stderr

   1 error[E0277]: the trait bound `&dyn std::io::Write: std::io::Write` is not satisfied
   2   --> $DIR/mut-borrow-needed-by-trait.rs:17:29
   3    |
   4 LL |     let fp = BufWriter::new(fp);
   5    |              -------------- ^^ the trait `std::io::Write` is not implemented for `&dyn std::io::Write`
   6    |              |
   7    |              required by a bound introduced by this call
   8    |
   9    = note: `std::io::Write` is implemented for `&mut dyn std::io::Write`, but not for `&dyn std::io::Write`
  10 note: required by a bound in `BufWriter::<W>::new`
  11   --> $SRC_DIR/std/src/io/buffered/bufwriter.rs:LL:COL
  12
  13 error[E0277]: the trait bound `&dyn std::io::Write: std::io::Write` is not satisfied
  14   --> $DIR/mut-borrow-needed-by-trait.rs:17:14
  15    |
  16 LL |     let fp = BufWriter::new(fp);
  17    |              ^^^^^^^^^^^^^^^^^^ the trait `std::io::Write` is not implemented for `&dyn std::io::Write`
  18    |
  19    = note: `std::io::Write` is implemented for `&mut dyn std::io::Write`, but not for `&dyn std::io::Write`
  20 note: required by a bound in `BufWriter`
  21   --> $SRC_DIR/std/src/io/buffered/bufwriter.rs:LL:COL
  22
  23 error[E0599]: the method `write_fmt` exists for struct `BufWriter<&dyn Write>`, but its trait bounds were not satisfied
  24   --> $DIR/mut-borrow-needed-by-trait.rs:21:5
  25    |
  26 LL |     writeln!(fp, "hello world").unwrap();
  27    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ method cannot be called on `BufWriter<&dyn Write>` due to unsatisfied trait bounds
  28   --> $SRC_DIR/std/src/io/buffered/bufwriter.rs:LL:COL
  29    |
  30    = note: doesn't satisfy `BufWriter<&dyn std::io::Write>: std::io::Write`
  31    |
  32    = note: the following trait bounds were not satisfied:
  33            `&dyn std::io::Write: std::io::Write`
  34            which is required by `BufWriter<&dyn std::io::Write>: std::io::Write`
  35    = note: this error originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
  36
  37 error: aborting due to 3 previous errors
  38
  39 Some errors have detailed explanations: E0277, E0599.
  40 For more information about an error, try `rustc --explain E0277`.