Merge pull request #1899 from trufflesuite/geth-getBlock-null

Handle `null` getBlock returns during live/testnet migrations

Author: CruzMolina

packages/truffle-reporters/reporters/migrations-V5/reporter.js

@@ -314,6 +314,9 @@ class Reporter {
         data.receipt.blockNumber
       );
 
+      // if geth returns null, try again!
+      if (!block) return this.postDeploy(data);
+
       data.timestamp = block.timestamp;
 
       const balance = await data.contract.web3.eth.getBalance(tx.from);