lifetime issue: Bug or not?

[Walter Bright]

On 11/22/2019 10:54 AM, Steven Schveighoffer wrote:
> I have code in my proprietary project that looks like this:
> 
> struct X
> {
>     ...
>     SQLStatement foo()
>     {
>        auto stmt = SQLStatement("`foo`"); // table
>        return stmt.where("`id` = ?", id);
>     }
> }
> 
> where is a function that adds a where clause with a given value to the SQL 
> statement. It takes an SQLStatement by ref, and returns that statement by ref.
> 
> Signature looks like this:
> 
> ref SQLStatement where(T)(return ref SQLStatement stmt, string clause, T val)

   ^^^                       ^^^^^^^^^^

>   Error: returning where(stmt, "`id` = ?", id) escapes a reference to local 
> variable stmt
> 
> But... it's not returning a ref.

Yes it is. See the ^^^^