3 //~^ ERROR: character literal may only contain one codepoint
5 //~^ ERROR: character literal may only contain one codepoint
7 //~^ ERROR: character literal may only contain one codepoint
10 //~^ ERROR: can't compare `&str` with `char`
11 if y == z {} // no error here
13 //~^ ERROR: can't compare `&str` with `char`
16 //~^ ERROR: mismatched types