Kotlin destructuring declaration from a run block -- compiler error, or my error?

In the example below, if I try to turn val x into val (x,y) IDE complains vigorously.

If I try to make the return an explicit pair for the val (p,q) assignment it get the same errors.

I do not understand where the problem is.

    val x: Pair<List<Monogram>, List<Double>> = run {
        // Computed integrated percent sorted by descending percent.
        val tot = tcC.sumOf { it.count }
        val sortedByDescendingCount = tcC.sortedByDescending { it.count }

        sortedByDescendingCount to
                sortedByDescendingCount
                    .map { it.count }
                    .runningFold(0.0) { z, x -> z + x }
                    .map { it / tot }
    }

    val (p,q) = run {
        // Computed integrated percent sorted by descending percent.
        val tot = tcC.sumOf { it.count }
        val sortedByDescendingCount = tcC.sortedByDescending { it.count }

        val integral =
                sortedByDescendingCount
                    .map { it.count }
                    .runningFold(0.0) { z, x -> z + x }
                    .map { it / tot }
        Pair(sortedByDescendingCount,integral)
    }

The IDE is

Android Studio Otter | 2025.2.1 Patch 1
Build #AI-252.25557.131.2521.14432022, built on November 13, 2025
Runtime version: 21.0.8+-14196175-b1038.72 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Toolkit: sun.awt.X11.XToolkit
Linux 6.14.0-36-generic
Ubuntu 24.04.3 LTS; glibc: 2.39
GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
Memory: 4096M
Cores: 24
Registry:
  debugger.watches.in.variables=false
  ide.experimental.ui=true
Non-Bundled Plugins:
  com.fwdekker.randomness (3.4.2)
  String Manipulation (9.16.0)
  com.github.marcopla99.cleancoderearranger (1.0.0)
Current Desktop: ubuntu:GNOME