error: file opened with `truncate` and `read`
  --> tests/ui/open_options.rs:17:5
   |
LL |     OpenOptions::new().read(true).truncate(true).open("foo.txt");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `-D clippy::nonsensical-open-options` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::nonsensical_open_options)]`

error: file opened with `append` and `truncate`
  --> tests/ui/open_options.rs:20:5
   |
LL |     OpenOptions::new().append(true).truncate(true).open("foo.txt");
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: the method `read` is called more than once
  --> tests/ui/open_options.rs:23:35
   |
LL |     OpenOptions::new().read(true).read(false).open("foo.txt");
   |                                   ^^^^^^^^^^^

error: the method `create` is called more than once
  --> tests/ui/open_options.rs:28:10
   |
LL |         .create(false)
   |          ^^^^^^^^^^^^^

error: the method `write` is called more than once
  --> tests/ui/open_options.rs:31:36
   |
LL |     OpenOptions::new().write(true).write(false).open("foo.txt");
   |                                    ^^^^^^^^^^^^

error: the method `append` is called more than once
  --> tests/ui/open_options.rs:33:37
   |
LL |     OpenOptions::new().append(true).append(false).open("foo.txt");
   |                                     ^^^^^^^^^^^^^

error: the method `truncate` is called more than once
  --> tests/ui/open_options.rs:35:39
   |
LL |     OpenOptions::new().truncate(true).truncate(false).open("foo.txt");
   |                                       ^^^^^^^^^^^^^^^

error: the method `read` is called more than once
  --> tests/ui/open_options.rs:38:41
   |
LL |     std::fs::File::options().read(true).read(false).open("foo.txt");
   |                                         ^^^^^^^^^^^

error: aborting due to 8 previous errors