Lifetime error when using nested signals

[jafioti]

I am getting a lifetime error when using multiple layers of nested signals and Indexed

This code produces the error:

#[component]
pub fn TempComponent<G: Html>(ctx: Scope) -> View<G> {
    let original = create_signal(ctx, vec![create_signal(ctx, vec![create_signal(ctx, 1)])]);
    view!{ctx,
        Indexed {
            iterable: original,
            view: |ctx, var| view! {ctx,
                InnerComponent(var)
            }
        }
    }
}

#[component]
fn InnerComponent<'a, G: Html>(ctx: Scope<'a>, var: &'a Signal<Vec<&'a Signal<i32>>>) -> View<G> {
    view!{ctx, 

    }
}

This code works fine:

#[component]
pub fn TempComponent<G: Html>(ctx: Scope) -> View<G> {
    let original = create_signal(ctx, vec![create_signal(ctx, 1)]);
    view!{ctx,
        Indexed {
            iterable: original,
            view: |ctx, var| view! {ctx,
                InnerComponent(var)
            }
        }
    }
}

#[component]
fn InnerComponent<'a, G: Html>(ctx: Scope<'a>, var: &'a Signal<i32>) -> View<G> {
    view!{ctx, 

    }
}

• Sycamore: master

[lukechu10]

Hmm this seems to be some kind of issue with Rust's lifetime shortening algorithm. This works:

#[component]
pub fn TempComponent<G: Html>(cx: Scope) -> View<G> {
    let original = create_signal(cx, vec![create_signal(cx, vec![create_signal(cx, 1)])]);
    view! { cx,
        Indexed {
            iterable: original,
            view: |cx, var| view! { cx,
                InnerComponent(var)
            }
        }
    }
}

#[component]
fn InnerComponent<'a, 'b: 'a, G: Html>(
    cx: Scope<'a>,
    _var: &'b Signal<Vec<&'b Signal<i32>>>,
) -> View<G> {
    view! {cx,

    }
}

[lukechu10]

I'll leave this open for now because it's kind of weird that the first doesn't work but the second works.