The doctor cancellation fixture wrote its readiness JSON with
writeFileSync, which truncates and then writes. The test polls only for
the file's existence, so a read between the two steps parsed an empty
file and failed with "Unexpected end of JSON input" (main run
43604752864, PR run 43606296871).
Write to a pending path and rename it into place, as ghidraJavaDoctor and
darwinProcessRunTokenReader fixtures already do. Apply the same fix to the
two sibling fixtures that poll for a PID file's existence and then parse
it: jadxConfiguration and runnerCancellation, where an empty read becomes
PID 0.
morluto
dfad81a48b