error: character literal may only contain one codepoint
  --> $DIR/issue-64732.rs:3:17
   |
LL |     let _foo = b'hello\0';
   |                 ^^^^^^^^^
help: if you meant to write a byte string literal, use double quotes
   |
LL |     let _foo = b"hello\0";
   |                 ^^^^^^^^^

error: character literal may only contain one codepoint
  --> $DIR/issue-64732.rs:6:16
   |
LL |     let _bar = 'hello';
   |                ^^^^^^^
help: if you meant to write a `str` literal, use double quotes
   |
LL |     let _bar = "hello";
   |                ^^^^^^^

error: aborting due to 2 previous errors