Change:
Functions defined inside of declarations seem to ignore all lifetimes and mutability. This allows for massively violating the safety guarantees of Rust:
Nominating, this seems incredibly serious.
According to it seems that the borrowck isn't bothering to walk statics/consts (see ). Presumably this code was never updated when it became possible to use blocks as the initializer expression.
Um, yeah, not good. I'll investigate soonish, presuming doesn't get there first.
P-back-compatlang, 1.0 beta

Discussion:
ast::ItemConst(_, ref ex) => { gather_loans::gather_loans_in_static_initializer(this, &**ex); } <del> _ => { visit::walk_item(this, item); } </del> <ins> _ => { } </ins> } <ins> visit::walk_item(this, item); </ins> } /// Collection of conclusions determined via borrow checker analyses.

<ins> // Copyright 2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. // Check that we check fns appearing in constant declarations. // Issue #22382. const MOVE: fn(&String) -> String = { fn broken(x: &String) -> String { return *x //~ ERROR cannot move } broken }; fn main() { } </ins>

<ins> // Copyright 2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. // Check that we check fns appearing in constant declarations. // Issue #22382. // How about mutating an immutable vector? const MUTATE: fn(&Vec<String>) = { fn broken(x: &Vec<String>) { x.push(format!("this is broken")); //~^ ERROR cannot borrow } broken }; fn main() { } </ins>

<ins> // Copyright 2014 The Rust Project Developers. See the COPYRIGHT // file at the top-level directory of this distribution and at // http://rust-lang.org/COPYRIGHT. // // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your // option. This file may not be copied, modified, or distributed // except according to those terms. // Check that we check fns appearing in constant declarations. // Issue #22382. // Returning local references? struct DropString { inner: String } impl Drop for DropString { fn drop(&mut self) { self.inner.clear(); self.inner.push_str("dropped"); } } const LOCAL_REF: fn() -> &'static str = { fn broken() -> &'static str { let local = DropString { inner: format!("Some local string") }; return &local.inner; //~ ERROR does not live long enough } broken }; fn main() { } </ins>