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//@ run-pass
// Regression test for broken MIR error (#61442)
// Due to the two possible evaluation orders for
// a '+=' expression (depending on whether or not the 'AddAssign' trait
// is being used), we were failing to account for all types that might
// possibly be live across a yield point.
#![feature(coroutines, stmt_expr_attributes)]
fn foo() {
let _x = #[coroutine] static || {
let mut s = String::new();
s += { yield; "" };
};
let _y = #[coroutine] static || {
let x = &mut 0;
*{ yield; x } += match String::new() { _ => 0 };
};
// Please don't ever actually write something like this
let _z = #[coroutine] static || {
let x = &mut 0;
*{
let inner = &mut 1;
*{ yield (); inner } += match String::new() { _ => 1};
yield;
x
} += match String::new() { _ => 2 };
};
}
fn main() {
foo()
}
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