Text selection panic on multi-line labels

[dominikwilkowski]

If I extend the widget gallery with the code below:

widget-gallery/src/labels.rs

use floem::{
    cosmic_text::{Style as FontStyle, Weight},
    peniko::Color,
    views::{label, static_label, tooltip, Decorators},
    IntoView,
};

use crate::form::{form, form_item};

pub fn label_view() -> impl IntoView {
    form({
        (
            form_item("Simple Label:".to_string(), 120.0, || {
                tooltip(label(move || "This is a simple label".to_owned()), || {
                    static_label("This is a tooltip for the label.")
                })
            }),
            form_item("Styled Label:".to_string(), 120.0, || {
                label(move || "This is a styled label".to_owned()).style(|s| {
                    s.background(Color::YELLOW)
                        .padding(10.0)
                        .color(Color::GREEN)
                        .font_weight(Weight::BOLD)
                        .font_style(FontStyle::Italic)
                        .font_size(24.0)
                })
            }),
+             form_item("Simple Label:".to_string(), 120.0, || {
+                 "My multiline label\nWith a second line\nAnd a third"
+             }),
        )
    })
}

The text select crashes as soon as I start the selection on the middle line and select up and down.

[jrmoulton]

I have other multiline labels that are working just fine. Not sure why this one in particular is crashing

[dominikwilkowski]

It crashes in my app as well which is how I found this.

[dominikwilkowski]

fixed via #493