Seed: Useless 'unreachable executed' panic when no element with ID 'app' exists

[FliegendeWurst]

And the message in the Option::except call doesn't show up.

https://github.com/David-OConnor/seed/blob/7d5150695f790a41aef5d158f7673c9a3e3aa797/src/vdom.rs#L166-L168

[David-OConnor]

I don't know why it's doing that, but I've worked around it by splitting into a match arm, then calling a console::error with a descriptive message, and panicking. (The panic message doesn't show; instead the 'unreachable executed' you found does, after the console::error.

[jesskfullwood]

@David-OConnor Take a look at this repo for explanation

[David-OConnor]

Will be in next release