rust/src/test/compile-fail/lambda-mutate-nested.rs
2012-07-01 19:19:32 -07:00

16 lines
414 B
Rust

// error-pattern:assigning to immutable variable declared in an outer block
// Make sure that nesting a block within a fn@ doesn't let us
// mutate upvars from a fn@.
fn f2(x: fn()) { x(); }
fn main() {
let i = 0;
let ctr = fn@ () -> int { f2(|| i = i + 1 ); ret i; };
log(error, ctr());
log(error, ctr());
log(error, ctr());
log(error, ctr());
log(error, ctr());
log(error, i);
}