Starting Rust runtime twice (sequentially) fails

[drrb]

Rust Version: 0.8
Platform: OSX

Starting the Rust runtime more than once (sequentially) fails with the following error.

task <unnamed> failed at 'assert_once_ever happened twice: last task exiting', /private/tmp/rust-ZPXh/src/libstd/rt/mod.rs:305
libc++abi.dylib: terminate called throwing an exception

This is a simple example that reproduces the problem.

#[start]
fn start(argc: int, argv: **u8) -> int {
    do std::rt::start(argc, argv) {
        println("First invocation");
    };

    do std::rt::start(argc, argv) {
        println("Second invocation");
    };

    0
}

The actual use-case is to call Rust code from Java (through JNI) multiple times. Calling Rust code this way requires starting the runtime for each call, which works for the first invocation, but not for subsequent ones