print stack trace on panic recovery (#2042)

beacon-chain/powchain/service.go

@@ -6,6 +6,7 @@ import (
 	"errors"
 	"fmt"
 	"math/big"
+	"runtime/debug"
 	"strings"
 	"time"
 
@@ -268,6 +269,8 @@ func safelyHandlePanic() {
 		log.WithFields(logrus.Fields{
 			"r": r,
 		}).Error("Panicked when handling data from ETH 1.0 Chain! Recovering...")
+
+		debug.PrintStack()
 	}
 }
 

beacon-chain/sync/initial-sync/service.go

@@ -14,6 +14,7 @@ import (
 	"context"
 	"errors"
 	"fmt"
+	"runtime/debug"
 	"strings"
 	"sync"
 	"time"
@@ -250,6 +251,8 @@ func safelyHandleMessage(fn func(p2p.Message), msg p2p.Message) {
 				"msg": printedMsg,
 			}).Error("Panicked when handling p2p message! Recovering...")
 
+			debug.PrintStack()
+
 			if msg.Ctx == nil {
 				return
 			}

beacon-chain/sync/regular_sync.go

@@ -4,6 +4,7 @@ package sync
 import (
 	"context"
 	"fmt"
+	"runtime/debug"
 
 	"github.com/gogo/protobuf/proto"
 	"github.com/prometheus/client_golang/prometheus"
@@ -241,6 +242,8 @@ func safelyHandleMessage(fn func(p2p.Message), msg p2p.Message) {
 				"msg": printedMsg,
 			}).Error("Panicked when handling p2p message! Recovering...")
 
+			debug.PrintStack()
+
 			if msg.Ctx == nil {
 				return
 			}

shared/messagehandler/messagehandler.go

@@ -3,6 +3,7 @@ package messagehandler
 import (
 	"context"
 	"fmt"
+	"runtime/debug"
 
 	"github.com/gogo/protobuf/proto"
 	"github.com/sirupsen/logrus"
@@ -25,6 +26,8 @@ func SafelyHandleMessage(ctx context.Context, fn func(ctx context.Context, messa
 				"msg": printedMsg,
 			}).Error("Panicked when handling p2p message! Recovering...")
 
+			debug.PrintStack()
+
 			if ctx == nil {
 				return
 			}