error-string-func-concat-2.ck:12:9: error: cannot perform '+' on '[fun]Foo.bar()' and string
[12] Foo.bar + " ";
             ^
error-string-func-concat-2.ck:12:5: error: ...(hint: to call the function, add '()' and any arguments)
[12] Foo.bar + " ";
         ^
