assert in stuck function also

Author: mafintosh

lib/replicator.js

@@ -30,7 +30,7 @@ const ReceiverQueue = require('./receiver-queue')
 const HotswapQueue = require('./hotswap-queue')
 const RemoteBitfield = require('./remote-bitfield')
 const { MerkleTree } = require('./merkle-tree')
-const { REQUEST_CANCELLED, REQUEST_TIMEOUT, INVALID_CAPABILITY, SNAPSHOT_NOT_AVAILABLE } = require('hypercore-errors')
+const { REQUEST_CANCELLED, REQUEST_TIMEOUT, INVALID_CAPABILITY, SNAPSHOT_NOT_AVAILABLE, ASSERTION } = require('hypercore-errors')
 const m = require('./messages')
 const caps = require('./caps')
 
@@ -1240,8 +1240,14 @@ class Peer {
 
     let span = 2
     let length = 0
+    let cnt = 0
 
     while (true) {
+      if (++cnt >= 1024) {
+        throw ASSERTION('_hasTreeParent is stuck, index=' + index + ', length=' + length +
+          ', span=' + span + ', remoteLength=' + this.remoteLength + ', length=' + this.core.state.length)
+      }
+
       ite.parent()
 
       const left = (ite.index - ite.factor / 2 + 1) / 2