Probably because its wrong. It was likely a compiler bug that got fixed.
The compiler says pretty clearly what the issue is. What if A has a
shorter lifetime than B? Then you are basically holding a reference to
data that has been disposed, which is what "can't" happen in rust.
On Thu, Sep 11, 2014 at 9:26 PM, Christophe Pedretti
<christophe.pedre...@gmail.com> wrote:
> Hello,
>
> with 0.11.0, this code was ok
>
>> pub struct Cursor<'a, 'b> {
>> pStmt : &'b Statement<'a>,
>> error : bool
>> }
>
>
> now, with the nighly, i receive a
>
> sql\connection.rs:50:1: 53:2 error: in type `&'b
> sql::connection::Statement<'a>`, reference has a longer lifetime than the
> data it references
> sql\connection.rs:50 pub struct Cursor<'a, 'b> {
> sql\connection.rs:51 pStmt : &'b Statement<'a>,
> sql\connection.rs:52 error : bool
> sql\connection.rs:53 }
> sql\connection.rs:50:1: 53:2 note: the pointer is valid for the lifetime 'b
> as defined on the struct at 50:0
> sql\connection.rs:50 pub struct Cursor<'a, 'b> {
> sql\connection.rs:51 pStmt : &'b Statement<'a>,
> sql\connection.rs:52 error : bool
> sql\connection.rs:53 }
> sql\connection.rs:50:1: 53:2 note: but the referenced data is only valid for
> the lifetime 'a as defined on the struct at 50:0
> sql\connection.rs:50 pub struct Cursor<'a, 'b> {
> sql\connection.rs:51 pStmt : &'b Statement<'a>,
> sql\connection.rs:52 error : bool
> sql\connection.rs:53 }
> error: aborting due to previous error
>
> why this change ?
>
>
> _______________________________________________
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> Rust-dev@mozilla.org
> https://mail.mozilla.org/listinfo/rust-dev
>
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