Fix sol[end] -> sol.u[end] in noindex test

ChrisRackauckas · claude · ChrisRackauckas · commit bcfa6097a89e · 2026-04-06T09:19:59.000-04:00
With RAT v4, sol[end] returns a scalar element instead of the last
state vector. Use sol.u[end] to access the last state vector.

Co-Authored-By: Chris Rackauckas &lt;accounts@chrisrackauckas.com&gt;
Co-Authored-By: Claude Opus 4.6 (1M context) &lt;noreply@anthropic.com&gt;
diff --git a/test/noindex_tests.jl b/test/noindex_tests.jl
@@ -111,7 +111,7 @@ for alg in algs
             ca0, tspan, p
         )
         sol = solve(prob, alg; save_everystep = false)
-        return 1 - norm(sol[end])^2
+        return 1 - norm(sol.u[end])^2
     end
     @test_nowarn Zygote.gradient(cost, par)
 end

Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,7 @@ for alg in algs`
`111`	`111`	`ca0, tspan, p`
`112`	`112`	`)`
`113`	`113`	`sol = solve(prob, alg; save_everystep = false)`
`114`		`- return 1 - norm(sol[end])^2`
	`114`	`+ return 1 - norm(sol.u[end])^2`
`115`	`115`	`end`
`116`	`116`	`@test_nowarn Zygote.gradient(cost, par)`
`117`	`117`	`end`