40 lines
935 B
Rust
40 lines
935 B
Rust
|
// Test cleanup of rvalue temporary that occurs while `~` construction
|
||
|
|
// is in progress. This scenario revealed a rather terrible bug. The
|
||
|
|
// ingredients are:
|
||
|
|
//
|
||
|
|
// 1. Partial cleanup of `~` is in scope,
|
||
|
|
// 2. cleanup of return value from `get_bar()` is in scope,
|
||
|
|
// 3. do_it() fails.
|
||
|
|
//
|
||
|
|
// This led to a bug because `the top-most frame that was to be
|
||
|
|
// cleaned (which happens to be the partial cleanup of `~`) required
|
||
|
|
// multiple basic blocks, which led to us dropping part of the cleanup
|
||
|
|
// from the top-most frame.
|
||
|
|
//
|
||
|
|
// It's unclear how likely such a bug is to recur, but it seems like a
|
||
|
|
// scenario worth testing.
|
||
|
|
|
||
|
|
use std::task;
|
||
|
|
|
||
|
|
enum Conzabble {
|
||
|
|
Bickwick(Foo)
|
||
|
|
}
|
||
|
|
|
||
|
|
struct Foo { field: ~uint }
|
||
|
|
|
||
|
|
fn do_it(x: &[uint]) -> Foo {
|
||
|
|
fail!()
|
||
|
|
}
|
||
|
|
|
||
|
|
fn get_bar(x: uint) -> ~[uint] { ~[x * 2] }
|
||
|
|
|
||
|
|
pub fn fails() {
|
||
|
|
let x = 2;
|
||
|
|
let mut y = ~[];
|
||
|
|
y.push(~Bickwick(do_it(get_bar(x))));
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn main() {
|
||
|
|
task::try(fails);
|
||
|
|
}
|