std: Change Finally to take `&mut self`

As with the previous commits, the Finally trait is primarily implemented for
closures, so the trait was modified from `&self` to `&mut self`. This will
require that any closure variable invoked with `finally` to be stored in a
mutable slot.

[breaking-change]

1 files changed, 1 insertions, 1 deletions

diff --git a/src/libstd/rt/task.rs b/src/libstd/rt/task.rs
index f75b5315207..2dab0e975da 100644
--- a/src/libstd/rt/task.rs
+++ b/src/libstd/rt/task.rs
@@ -109,7 +109,7 @@ impl Task {
     /// This function is *not* meant to be abused as a "try/catch" block. This
     /// is meant to be used at the absolute boundaries of a task's lifetime, and
     /// only for that purpose.
-    pub fn run(~self, f: ||) -> ~Task {
+    pub fn run(~self, mut f: ||) -> ~Task {
         // Need to put ourselves into TLS, but also need access to the unwinder.
         // Unsafely get a handle to the task so we can continue to use it after
         // putting it in tls (so we can invoke the unwinder).