resolve and reject on same execution tree

quint/src/quintVerifier.ts

@@ -225,26 +225,42 @@ async function loadProtoDefViaReflection(): Promise<VerifyResult<ProtoPackageDef
   const serverReflectionService = reflectionProtoDescriptor.grpc.reflection.v1alpha.ServerReflection
   const reflectionClient = new serverReflectionService(APALACHE_SERVER_URI, grpc.credentials.createInsecure())
 
-  const protoDefResponse: ServerReflectionResponse = await new Promise((resolve, reject) => {
+  const protoDefResponses: ServerReflectionResponse[] = await new Promise((resolve, reject) => {
     // Query reflection endpoint
     const call = reflectionClient.ServerReflectionInfo()
     call.write({ file_containing_symbol: 'shai.cmdExecutor.CmdExecutor' })
 
+    let responses: ServerReflectionResponse[] = []
+
     call.on('data', (reflectionResponse: ServerReflectionResponse) => {
       call.cancel()
-      resolve(reflectionResponse)
+      responses.push(reflectionResponse)
     })
 
     call.on('error', (e: any) => {
-      // Ignore cancellation errors
-      if (e.code !== grpc.status.CANCELLED) {
+      if (e.code === grpc.status.CANCELLED) {
+        // Cancelled by us, so we have the response
+        resolve(responses)
+      } else {
+        // Ignore cancellation errors
         // An error has occurred and the stream has been closed.
         console.error(e)
         reject(e)
       }
     })
   })
 
+  if (protoDefResponses.length === 0) {
+    return err(`Apalache gRPC endpoint is corrupted. Could not extract proto file: no response from reflection service`)
+  } else if (protoDefResponses.length > 1) {
+    return err(
+      `Apalache gRPC endpoint is corrupted. Could not extract proto file: multiple responses from reflection service`
+    )
+  }
+
+  // We have a single response
+  const protoDefResponse = protoDefResponses[0]
+
   if ('error_response' in protoDefResponse) {
     return err(
       `Apalache gRPC endpoint is corrupted. Could not extract proto file: ${protoDefResponse.error_response.error_message}`