Splat Route's inside pathless layout routes break with `"-"` at the start of the URL

[ryanflorence]

What version of React Router are you using?

v6

Steps to Reproduce

https://stackblitz.com/edit/splat-route-dash-bug?file=src/App.tsx

<Routes>
  <Route element={<Layout />}>
    <Route path="*" element={<Splat />} />
  </Route>
</Routes>

Visit /-anything that starts with a "-".

Expected Behavior

Splat route should render at "/-splat"

Actual Behavior

Blank page, "no routes match" in the console.

Note that if you remove the pathless layout route above the splat it works fine.

[timdorr]

Duplicate of #8525

Slight difference in the pattern, but essentially the same bug.

[timdorr]

This patch may fix it: https://gist.github.com/kiliman/9b85e7873ed852d5ef0ea2f5af126b4b

[brophdawg11]

Fixed in #8563