Check nil message and report

Signed-off-by: Jay Guo <guojiannan1101@gmail.com>
Hyperledger-TWGC · Nov 6, 2020 · 34a2b47 · 34a2b47
1 parent d331da6
commit 34a2b47
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/pkg/infra/observer.go b/pkg/infra/observer.go
@@ -51,6 +51,10 @@ func (o *Observer) Start(N int, now time.Time) {
 			o.signal <- err
 		}
 
+		if r == nil {
+			panic("Received nil message, but expect a valid block instead. You could look into your peer logs for more info")
+		}
+
 		fb := r.Type.(*peer.DeliverResponse_FilteredBlock)
 		n = n + len(fb.FilteredBlock.FilteredTransactions)
 		fmt.Printf("Time %8.2fs\tBlock %6d\tTx %6d\n", time.Since(now).Seconds(), fb.FilteredBlock.Number, len(fb.FilteredBlock.FilteredTransactions))