struct Foo<'a> { a: &'a usize }

fn get_account_value<'l>(
    flag: bool,
    a: &'l mut Foo,
    b: &'l mut Foo,
) {
    let _ = if flag { a } else { b };
}

error[E0623]: lifetime mismatch
 --> src/main.rs:8:34
  |
5 |     a: &'l mut Foo,
  |                ---
6 |     b: &'l mut Foo,
  |                --- these two types are declared with different lifetimes...
7 | ) {
8 |     let _ = if flag { a } else { b };
  |                                  ^ ...but data from `b` flows into `a` here

error[E0623]: lifetime mismatch
 --> src/main.rs:8:34
  |
5 |     a: &'l mut Foo,
  |                --- these two types are declared with different lifetimes...
6 |     b: &'l mut Foo,
  |                ---
7 | ) {
8 |     let _ = if flag { a } else { b };
  |                                  ^ ...but data from `a` flows into `b` here

error: aborting due to 2 previous errors