error: unknown start of token: \u{0}
  --> $DIR/issue-68730.rs:5:5
   |
LL | enum em ˂˂
   |     ^
   |
   = help: source files must contain UTF-8 encoded text, unexpected null bytes might occur when a different encoding is used

error: unknown start of token: \u{0}
  --> $DIR/issue-68730.rs:5:8
   |
LL | enum em ˂˂
   |       ^
   |
   = help: source files must contain UTF-8 encoded text, unexpected null bytes might occur when a different encoding is used

error: unknown start of token: \u{2c2}
  --> $DIR/issue-68730.rs:5:9
   |
LL | enum em ˂˂
   |       ^
   |
help: Unicode character '˂' (Modifier Letter Left Arrowhead) looks like '<' (Less-Than Sign), but it is not
   |
LL | enum em <˂
   |       ~

error: unknown start of token: \u{2c2}
  --> $DIR/issue-68730.rs:5:10
   |
LL | enum em ˂˂
   |        ^
   |
help: Unicode character '˂' (Modifier Letter Left Arrowhead) looks like '<' (Less-Than Sign), but it is not
   |
LL | enum em ˂<
   |        ~

error: expected one of `#`, `>`, `const`, identifier, or lifetime, found `<`
  --> $DIR/issue-68730.rs:5:10
   |
LL | enum em ˂˂
   |        ^ expected one of `#`, `>`, `const`, identifier, or lifetime

error: aborting due to 5 previous errors