error.rs

    fn bad_fn<'script, 'event, 'run, Ctx>(
        &'script self,
        context: &'run Ctx,
        event: &'run mut Value<'event>,
        meta: &'run mut Value<'event>,
        local: &'run mut Value<'event>,
        path: &'run ast::Path,
        value: &'run Value<'event>,
        stack: &'run ValueStack<'event>,
    ) -> Result<Value<'event>, Error>
    where
        Ctx: Context + 'static,
        'script: 'event,
        'event: 'run,
    {
      // ...
       let e := expr.run(context, event, meta, local, stack)?;
      // ...
    }

/*
error[E0623]: lifetime mismatch
   --> src/interpreter.rs:307:54
    |
282 |         context: &'run Ctx,
    |                  --------- these two types are declared with different lifetimes...
283 |         event: &'run mut Value<'event>,
    |                          -------------
...
307 |                     1 => match exprs[0].run(context, event, meta, local, stack)? {
    |                                                      ^^^^^ ...but data from `context` flows into `event` here
*/


// Solution: change the lifetime of 'path' to 'script'
    fn bad_fn<'script, 'event, 'run, Ctx>(
        &'script self,
        context: &'run Ctx,
        event: &'run mut Value<'event>,
        meta: &'run mut Value<'event>,
        local: &'run mut Value<'event>,
        path: &'script ast::Path,
        value: &'run Value<'event>,
        stack: &'run ValueStack<'event>,
    ) -> Result<Value<'event>, Error>
    where
        Ctx: Context + 'static,
        'script: 'event,
        'event: 'run,
    {
      // ...
       let e := expr.run(context, event, meta, local, stack)?;
      // ...
    }