src/test/ui/parser/lex-bad-char-literals-3.stderr

error: character literal may only contain one codepoint
  --> $DIR/lex-bad-char-literals-3.rs:15:5
   |
LL |     '●●' //~ ERROR: character literal may only contain one codepoint
   |     ^^^^
help: if you meant to write a `str` literal, use double quotes
   |
LL |     "●●" //~ ERROR: character literal may only contain one codepoint
   |     ^^^^

error: aborting due to previous error