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// Vectors are allocated in the Rust kernel's memory region, use of
// which requires some amount of synchronization. This test exercises
// that synchronization by spawning a number of tasks and then
// allocating and freeing vectors.
fn f(&&n: uint) {
uint::range(0u, n) {|i|
let mut v: [u8] = [];
vec::reserve(v, 1000u);
fn main(args: [str]) {
let n = if vec::len(args) < 2u { 100u }
else { option::get(uint::from_str(args[1])) };
uint::range(0u, 100u) {|i| task::spawn {|| f(n); };}
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