error: expected a valid part of an attribute, got a block. Did you mean to write `${..}` to interpolate an expression?
 --> $DIR/block_in_attribute-fail.rs:6:31
  |
6 |             background-color: {should_be_expression};
  |                               ^^^^^^^^^^^^^^^^^^^^^^

error: expected a valid part of an attribute, got a block. Did you mean to write `${..}` to interpolate an expression?
 --> $DIR/block_in_attribute-fail.rs:7:20
  |
7 |             color: {another_expression};
  |                    ^^^^^^^^^^^^^^^^^^^^