error: expected `(` or `{`, found `[`
  --> $DIR/paren-or-brace-expected.rs:3:10
   |
LL |         $[count($i)]
   |          ^^^^^^^^^^^

error: expected one of: `*`, `+`, or `?`
  --> $DIR/paren-or-brace-expected.rs:3:10
   |
LL |         $[count($i)]
   |          ^^^^^^^^^^^

error: aborting due to 2 previous errors