diff --git a/src/libstd/rt/task.rs b/src/libstd/rt/task.rs
index abafe1cf209..ffe9f118b47 100644
--- a/src/libstd/rt/task.rs
+++ b/src/libstd/rt/task.rs
@@ -303,7 +303,7 @@ impl Task {
 impl Drop for Task {
     fn drop(&self) {
         rtdebug!("called drop for a task: %u", borrow::to_uint(self));
-        assert!(self.destroyed)
+        rtassert!(self.destroyed)
     }
 }
 
@@ -313,7 +313,7 @@ impl Drop for Task {
 impl Coroutine {
 
     pub fn new(stack_pool: &mut StackPool, start: ~fn()) -> Coroutine {
-        static MIN_STACK_SIZE: uint = 2000000; // XXX: Too much stack
+        static MIN_STACK_SIZE: uint = 3000000; // XXX: Too much stack
 
         let start = Coroutine::build_start_wrapper(start);
         let mut stack = stack_pool.take_segment(MIN_STACK_SIZE);