error: expected unsuffixed literal, found `foo`
  --> $DIR/attr-unquoted-ident.rs:5:15
   |
LL |     #[cfg(key=foo)]
   |               ^^^
   |
help: surround the identifier with quotation marks to parse it as a string
   |
LL |     #[cfg(key="foo")]
   |               +   +

error: expected unsuffixed literal, found `foo`
  --> $DIR/attr-unquoted-ident.rs:11:15
   |
LL |     #[cfg(key=foo bar baz)]
   |               ^^^
   |
help: surround the identifier with quotation marks to parse it as a string
   |
LL |     #[cfg(key="foo bar baz")]
   |               +           +

error: aborting due to 2 previous errors