A push that said 'told' is a push that sent, whatever became of the exec afterwards

test/integration/one-node-mesh.test.ts

@@ -231,6 +231,11 @@ async function mesh(command: string, timeoutMs?: number): Promise<string> {
   for (;;) {
     const { out, ok } = await on(CONTROL, `docker exec mesh-controller /mesh-controller ${command}`, timeoutMs);
     if (ok) return out;
+    // A push that has said "N node(s) told" has done its work: the declaration is on the bus. The
+    // exec carrying it can still die afterwards with no message when the controller itself is
+    // recreated under it — which is exactly what an in-place broker upgrade does, since the
+    // controller reconnects to the bus that returns (S2). The send is what the push is for.
+    if (/^push\b/.test(command) && /\d+ node\(s\) told/.test(out)) return out;
     // "No such exec instance" and a daemon that cannot be reached are the same race one layer down:
     // applying the packet filter restarts the container runtime itself, and every container with
     // it, a few seconds after the installer's last push returns.