Segfault in rust 0.9-ish (rust commit 74258eae)

segfault.rs

fn main() {
    let mut c = Container { tests: ~[] };
    c.add_str_test(~"/");
    c.tests[0].test();
}

trait Test {
    fn test(&self) -> bool;
}

struct Container {
    tests: ~[~Test],
}

impl Container {
    fn add_test(&mut self, test: ~Test) {
        self.tests.push(test);
    }

    fn add_str_test(&mut self, data: ~str) {
        self.add_test(~StrTest { data: data });
        // changing to this doesn't segfault:
        // self.add_test(~StrTest { data: data } as ~Test);
    }
}

struct StrTest {
    data: ~str,
}

impl Test for StrTest {
    fn test(&self) -> bool {
        self.data.len();  // Segmentation fault occurs here
        true
    }
}