error[E0277]: the size for values of type `[i32]` cannot be known at compilation time --> $DIR/collect-into-slice.rs:6:9 | LL | let some_generated_vec = (0..10).collect(); | ^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `[i32]` = note: all local variables must have a statically known size = help: unsized locals are gated as an unstable feature error[E0277]: the size for values of type `[i32]` cannot be known at compilation time --> $DIR/collect-into-slice.rs:6:38 | LL | let some_generated_vec = (0..10).collect(); | ^^^^^^^ doesn't have a size known at compile-time | = help: the trait `Sized` is not implemented for `[i32]` note: required by a bound in `collect` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL error[E0277]: a slice of type `[i32]` cannot be built since `[i32]` has no definite size --> $DIR/collect-into-slice.rs:6:38 | LL | let some_generated_vec = (0..10).collect(); | ^^^^^^^ try explicitly collecting into a `Vec<{integer}>` | = help: the trait `FromIterator<{integer}>` is not implemented for `[i32]` note: required by a bound in `collect` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL error[E0277]: a slice of type `&[i32]` cannot be built since we need to store the elements somewhere --> $DIR/collect-into-slice.rs:18:38 | LL | let some_generated_vec = (0..10).collect(); | ^^^^^^^ try explicitly collecting into a `Vec<{integer}>` | = help: the trait `FromIterator<{integer}>` is not implemented for `&[i32]` note: required by a bound in `collect` --> $SRC_DIR/core/src/iter/traits/iterator.rs:LL:COL error: aborting due to 4 previous errors For more information about this error, try `rustc --explain E0277`.