error: expected identifier, found reserved identifier `_`
  --> $DIR/underscore-suffix-for-float.rs:2:16
   |
LL |     let a = 42._;
   |                ^ expected identifier, found reserved identifier

error[E0610]: `{integer}` is a primitive type and therefore doesn't have fields
  --> $DIR/underscore-suffix-for-float.rs:2:16
   |
LL |     let a = 42._;
   |                ^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0610`.