error: expected `[`, found `B`
  --> $DIR/issue-71471-ignore-tidy.rs:2:3
   |
LL | #!B
   |   ^ expected `[`
   |
   = note: the token sequence `#!` here looks like the start of a shebang interpreter directive but it is not
   = help: if you meant this to be a shebang interpreter directive, move it to the very start of the file

error: aborting due to 1 previous error