Reacton/use_thread issue

Running this, and hitting compute triggers a keyerror in reacton. The fix is to put str(../) around the last line, but that should not be needed.

import solara
import time


process = solara.reactive(0)

def heavy_compute():
    for i in range(10):
        print("Computing...", i)
        process.value = i
        time.sleep(0.1)
    return 42

@solara.component
def Page():
    compute = solara.use_reactive(False)
    result_using_reactive = solara.use_reactive(None)

    def maybe_do_compute():
        if compute.value:
            result_using_reactive.value = heavy_compute()
            compute.set(False)
    result = solara.use_thread(maybe_do_compute, dependencies=[compute.value])

    solara.Button("Compute", on_click=lambda: compute.set(True))
    solara.Button("Cancel", on_click=lambda: compute.set(False))

    if result.state == solara.ResultState.RUNNING:
        solara.ProgressLinear(process.value * 10)
    if result_using_reactive.value:
        solara.Text(result_using_reactive.value)

Reproduce the issue with the provided Page example, especially the solara.use_thread call and its dependencies=[compute.value] argument. Inspect the use_thread path while compute triggers and capture the KeyError. Done means the example runs without wrapping the final line in str(../), while progress and result behavior remain usable.