From 7a7428a027de03ad9e80e89a70818c692193e60a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?P=C3=A9ter=20Szil=C3=A1gyi?= <peterke@gmail.com>
Date: Fri, 27 Apr 2018 14:27:33 +0300
Subject: [PATCH] core, eth: fix tracer dirty finalization

---
 core/state/statedb.go | 21 ---------------------
 core/vm/evm.go        |  5 +++++
 eth/api_tracer.go     |  5 +++--
 3 files changed, 8 insertions(+), 23 deletions(-)

diff --git a/core/state/statedb.go b/core/state/statedb.go
index 3ae6843d87..a952027d6d 100644
--- a/core/state/statedb.go
+++ b/core/state/statedb.go
@@ -572,27 +572,6 @@ func (self *StateDB) Prepare(thash, bhash common.Hash, ti int) {
 	self.txIndex = ti
 }
 
-// DeleteSuicides flags the suicided objects for deletion so that it
-// won't be referenced again when called / queried up on.
-//
-// DeleteSuicides should not be used for consensus related updates
-// under any circumstances.
-func (s *StateDB) DeleteSuicides() {
-	// Reset refund so that any used-gas calculations can use this method.
-	s.clearJournalAndRefund()
-
-	for addr := range s.stateObjectsDirty {
-		stateObject := s.stateObjects[addr]
-
-		// If the object has been removed by a suicide
-		// flag the object as deleted.
-		if stateObject.suicided {
-			stateObject.deleted = true
-		}
-		delete(s.stateObjectsDirty, addr)
-	}
-}
-
 func (s *StateDB) clearJournalAndRefund() {
 	s.journal = newJournal()
 	s.validRevisions = s.validRevisions[:0]
diff --git a/core/vm/evm.go b/core/vm/evm.go
index 96676c314a..ea46209742 100644
--- a/core/vm/evm.go
+++ b/core/vm/evm.go
@@ -160,6 +160,11 @@ func (evm *EVM) Call(caller ContractRef, addr common.Address, input []byte, gas
 			precompiles = PrecompiledContractsByzantium
 		}
 		if precompiles[addr] == nil && evm.ChainConfig().IsEIP158(evm.BlockNumber) && value.Sign() == 0 {
+			// Calling a non existing account, don't do antything, but ping the tracer
+			if evm.vmConfig.Debug && evm.depth == 0 {
+				evm.vmConfig.Tracer.CaptureStart(caller.Address(), addr, false, input, gas, value)
+				evm.vmConfig.Tracer.CaptureEnd(ret, 0, 0, nil)
+			}
 			return nil, gas, nil
 		}
 		evm.StateDB.CreateAccount(addr)
diff --git a/eth/api_tracer.go b/eth/api_tracer.go
index 07c4457bc3..80a3ab719d 100644
--- a/eth/api_tracer.go
+++ b/eth/api_tracer.go
@@ -201,7 +201,7 @@ func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Bl
 						log.Warn("Tracing failed", "hash", tx.Hash(), "block", task.block.NumberU64(), "err", err)
 						break
 					}
-					task.statedb.DeleteSuicides()
+					task.statedb.Finalise(true)
 					task.results[i] = &txTraceResult{Result: res}
 				}
 				// Stream the result back to the user or abort on teardown
@@ -640,7 +640,8 @@ func (api *PrivateDebugAPI) computeTxEnv(blockHash common.Hash, txIndex int, ree
 		if _, _, _, err := core.ApplyMessage(vmenv, msg, new(core.GasPool).AddGas(tx.Gas())); err != nil {
 			return nil, vm.Context{}, nil, fmt.Errorf("tx %x failed: %v", tx.Hash(), err)
 		}
-		statedb.DeleteSuicides()
+		// Ensure any modifications are committed to the state
+		statedb.Finalise(true)
 	}
 	return nil, vm.Context{}, nil, fmt.Errorf("tx index %d out of range for block %x", txIndex, blockHash)
 }