From 2697e44d819377e39a781e5ab9f1814426b4b0f0 Mon Sep 17 00:00:00 2001
From: "Seungbae.yu" <72970043+dbadoy@users.noreply.github.com>
Date: Mon, 4 Jul 2022 17:03:32 +0900
Subject: [PATCH] all: change format `0x%x` to `%#x` (#25221)

---
 accounts/scwallet/securechannel.go     |  4 ++--
 accounts/scwallet/wallet.go            |  2 +-
 cmd/devp2p/internal/ethtest/snap.go    |  4 ++--
 cmd/evm/runner.go                      |  2 +-
 cmd/geth/dbcmd.go                      | 12 ++++++------
 cmd/rlpdump/main.go                    |  2 +-
 cmd/rlpdump/rlpdump_test.go            |  2 +-
 consensus/misc/forks.go                |  2 +-
 core/asm/asm.go                        |  4 ++--
 core/blockchain.go                     |  2 +-
 core/types/hashing_test.go             |  2 +-
 core/vm/jump_table.go                  |  2 +-
 core/vm/opcodes.go                     |  2 +-
 core/vm/runtime/runtime_test.go        |  4 ++--
 eth/api.go                             |  2 +-
 eth/api_test.go                        |  2 +-
 eth/filters/api_test.go                |  2 +-
 eth/tracers/logger/logger.go           |  8 ++++----
 internal/ethapi/api.go                 |  2 +-
 mobile/types.go                        |  4 ++--
 signer/core/apitypes/types.go          |  2 +-
 signer/core/signed_data.go             |  4 ++--
 tests/fuzzers/stacktrie/trie_fuzzer.go |  2 +-
 tests/fuzzers/trie/trie-fuzzer.go      |  2 +-
 trie/trie_test.go                      |  2 +-
 25 files changed, 39 insertions(+), 39 deletions(-)

diff --git a/accounts/scwallet/securechannel.go b/accounts/scwallet/securechannel.go
index 10887a8b43..b1b533eb72 100644
--- a/accounts/scwallet/securechannel.go
+++ b/accounts/scwallet/securechannel.go
@@ -178,7 +178,7 @@ func (s *SecureChannelSession) mutuallyAuthenticate() error {
 		return err
 	}
 	if response.Sw1 != 0x90 || response.Sw2 != 0x00 {
-		return fmt.Errorf("got unexpected response from MUTUALLY_AUTHENTICATE: 0x%x%x", response.Sw1, response.Sw2)
+		return fmt.Errorf("got unexpected response from MUTUALLY_AUTHENTICATE: %#x%x", response.Sw1, response.Sw2)
 	}
 
 	if len(response.Data) != scSecretLength {
@@ -261,7 +261,7 @@ func (s *SecureChannelSession) transmitEncrypted(cla, ins, p1, p2 byte, data []b
 	rapdu.deserialize(plainData)
 
 	if rapdu.Sw1 != sw1Ok {
-		return nil, fmt.Errorf("unexpected response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", cla, ins, rapdu.Sw1, rapdu.Sw2)
+		return nil, fmt.Errorf("unexpected response status Cla=%#x, Ins=%#x, Sw=%#x%x", cla, ins, rapdu.Sw1, rapdu.Sw2)
 	}
 
 	return rapdu, nil
diff --git a/accounts/scwallet/wallet.go b/accounts/scwallet/wallet.go
index 2a2b83bd1b..5082dec1cb 100644
--- a/accounts/scwallet/wallet.go
+++ b/accounts/scwallet/wallet.go
@@ -167,7 +167,7 @@ func transmit(card *pcsc.Card, command *commandAPDU) (*responseAPDU, error) {
 	}
 
 	if response.Sw1 != sw1Ok {
-		return nil, fmt.Errorf("unexpected insecure response status Cla=0x%x, Ins=0x%x, Sw=0x%x%x", command.Cla, command.Ins, response.Sw1, response.Sw2)
+		return nil, fmt.Errorf("unexpected insecure response status Cla=%#x, Ins=%#x, Sw=%#x%x", command.Cla, command.Ins, response.Sw1, response.Sw2)
 	}
 
 	return response, nil
diff --git a/cmd/devp2p/internal/ethtest/snap.go b/cmd/devp2p/internal/ethtest/snap.go
index 9c3e88f9cb..fa94c13ad2 100644
--- a/cmd/devp2p/internal/ethtest/snap.go
+++ b/cmd/devp2p/internal/ethtest/snap.go
@@ -496,10 +496,10 @@ func (s *Suite) snapGetAccountRange(t *utesting.T, tc *accRangeTest) error {
 	}
 	if len(hashes) > 0 {
 		if exp, got := tc.expFirst, res.Accounts[0].Hash; exp != got {
-			return fmt.Errorf("expected first account 0x%x, got 0x%x", exp, got)
+			return fmt.Errorf("expected first account %#x, got %#x", exp, got)
 		}
 		if exp, got := tc.expLast, res.Accounts[len(res.Accounts)-1].Hash; exp != got {
-			return fmt.Errorf("expected last account 0x%x, got 0x%x", exp, got)
+			return fmt.Errorf("expected last account %#x, got %#x", exp, got)
 		}
 	}
 	// Reconstruct a partial trie from the response and verify it
diff --git a/cmd/evm/runner.go b/cmd/evm/runner.go
index 756d762b53..05b9ccdebc 100644
--- a/cmd/evm/runner.go
+++ b/cmd/evm/runner.go
@@ -309,7 +309,7 @@ allocated bytes: %d
 `, initialGas-leftOverGas, stats.time, stats.allocs, stats.bytesAllocated)
 	}
 	if tracer == nil {
-		fmt.Printf("0x%x\n", output)
+		fmt.Printf("%#x\n", output)
 		if err != nil {
 			fmt.Printf(" error: %v\n", err)
 		}
diff --git a/cmd/geth/dbcmd.go b/cmd/geth/dbcmd.go
index be994def34..33e7efbef5 100644
--- a/cmd/geth/dbcmd.go
+++ b/cmd/geth/dbcmd.go
@@ -337,9 +337,9 @@ func checkStateContent(ctx *cli.Context) error {
 		hasher.Read(got)
 		if !bytes.Equal(k, got) {
 			errs++
-			fmt.Printf("Error at 0x%x\n", k)
-			fmt.Printf("  Hash:  0x%x\n", got)
-			fmt.Printf("  Data:  0x%x\n", v)
+			fmt.Printf("Error at %#x\n", k)
+			fmt.Printf("  Hash:  %#x\n", got)
+			fmt.Printf("  Data:  %#x\n", v)
 		}
 		if time.Since(lastLog) > 8*time.Second {
 			log.Info("Iterating the database", "at", fmt.Sprintf("%#x", k), "elapsed", common.PrettyDuration(time.Since(startTime)))
@@ -716,7 +716,7 @@ func showMetaData(ctx *cli.Context) error {
 		if val == nil {
 			return "<nil>"
 		}
-		return fmt.Sprintf("%d (0x%x)", *val, *val)
+		return fmt.Sprintf("%d (%#x)", *val, *val)
 	}
 	data := [][]string{
 		{"databaseVersion", pp(rawdb.ReadDatabaseVersion(db))},
@@ -726,7 +726,7 @@ func showMetaData(ctx *cli.Context) error {
 	if b := rawdb.ReadHeadBlock(db); b != nil {
 		data = append(data, []string{"headBlock.Hash", fmt.Sprintf("%v", b.Hash())})
 		data = append(data, []string{"headBlock.Root", fmt.Sprintf("%v", b.Root())})
-		data = append(data, []string{"headBlock.Number", fmt.Sprintf("%d (0x%x)", b.Number(), b.Number())})
+		data = append(data, []string{"headBlock.Number", fmt.Sprintf("%d (%#x)", b.Number(), b.Number())})
 	}
 	if b := rawdb.ReadSkeletonSyncStatus(db); b != nil {
 		data = append(data, []string{"SkeletonSyncStatus", string(b)})
@@ -734,7 +734,7 @@ func showMetaData(ctx *cli.Context) error {
 	if h := rawdb.ReadHeadHeader(db); h != nil {
 		data = append(data, []string{"headHeader.Hash", fmt.Sprintf("%v", h.Hash())})
 		data = append(data, []string{"headHeader.Root", fmt.Sprintf("%v", h.Root)})
-		data = append(data, []string{"headHeader.Number", fmt.Sprintf("%d (0x%x)", h.Number, h.Number)})
+		data = append(data, []string{"headHeader.Number", fmt.Sprintf("%d (%#x)", h.Number, h.Number)})
 	}
 	data = append(data, [][]string{{"frozen", fmt.Sprintf("%d items", ancients)},
 		{"lastPivotNumber", pp(rawdb.ReadLastPivotNumber(db))},
diff --git a/cmd/rlpdump/main.go b/cmd/rlpdump/main.go
index 9c0af01248..70337749ae 100644
--- a/cmd/rlpdump/main.go
+++ b/cmd/rlpdump/main.go
@@ -83,7 +83,7 @@ func main() {
 		if err != nil {
 			die(err)
 		}
-		fmt.Printf("0x%x\n", data)
+		fmt.Printf("%#x\n", data)
 		return
 	} else {
 		err := rlpToText(r, out)
diff --git a/cmd/rlpdump/rlpdump_test.go b/cmd/rlpdump/rlpdump_test.go
index 899beef32f..a9ab57fdb8 100644
--- a/cmd/rlpdump/rlpdump_test.go
+++ b/cmd/rlpdump/rlpdump_test.go
@@ -43,7 +43,7 @@ func TestRoundtrip(t *testing.T) {
 			t.Errorf("test %d: error %v", i, err)
 			continue
 		}
-		have := fmt.Sprintf("0x%x", rlpBytes)
+		have := fmt.Sprintf("%#x", rlpBytes)
 		if have != want {
 			t.Errorf("test %d: have\n%v\nwant:\n%v\n", i, have, want)
 		}
diff --git a/consensus/misc/forks.go b/consensus/misc/forks.go
index 4a5e7c37e0..a6f3303ea6 100644
--- a/consensus/misc/forks.go
+++ b/consensus/misc/forks.go
@@ -35,7 +35,7 @@ func VerifyForkHashes(config *params.ChainConfig, header *types.Header, uncle bo
 	// If the homestead reprice hash is set, validate it
 	if config.EIP150Block != nil && config.EIP150Block.Cmp(header.Number) == 0 {
 		if config.EIP150Hash != (common.Hash{}) && config.EIP150Hash != header.Hash() {
-			return fmt.Errorf("homestead gas reprice fork: have 0x%x, want 0x%x", header.Hash(), config.EIP150Hash)
+			return fmt.Errorf("homestead gas reprice fork: have %#x, want %#x", header.Hash(), config.EIP150Hash)
 		}
 	}
 	// All ok, return
diff --git a/core/asm/asm.go b/core/asm/asm.go
index f3f129714d..7c1e14ec01 100644
--- a/core/asm/asm.go
+++ b/core/asm/asm.go
@@ -109,7 +109,7 @@ func PrintDisassembled(code string) error {
 	it := NewInstructionIterator(script)
 	for it.Next() {
 		if it.Arg() != nil && 0 < len(it.Arg()) {
-			fmt.Printf("%05x: %v 0x%x\n", it.PC(), it.Op(), it.Arg())
+			fmt.Printf("%05x: %v %#x\n", it.PC(), it.Op(), it.Arg())
 		} else {
 			fmt.Printf("%05x: %v\n", it.PC(), it.Op())
 		}
@@ -124,7 +124,7 @@ func Disassemble(script []byte) ([]string, error) {
 	it := NewInstructionIterator(script)
 	for it.Next() {
 		if it.Arg() != nil && 0 < len(it.Arg()) {
-			instrs = append(instrs, fmt.Sprintf("%05x: %v 0x%x\n", it.PC(), it.Op(), it.Arg()))
+			instrs = append(instrs, fmt.Sprintf("%05x: %v %#x\n", it.PC(), it.Op(), it.Arg()))
 		} else {
 			instrs = append(instrs, fmt.Sprintf("%05x: %v\n", it.PC(), it.Op()))
 		}
diff --git a/core/blockchain.go b/core/blockchain.go
index 3b677aca6c..0a5ba1da0b 100644
--- a/core/blockchain.go
+++ b/core/blockchain.go
@@ -2342,7 +2342,7 @@ func (bc *BlockChain) reportBlock(block *types.Block, receipts types.Receipts, e
 Chain config: %v
 
 Number: %v
-Hash: 0x%x
+Hash: %#x
 %v
 
 Error: %v
diff --git a/core/types/hashing_test.go b/core/types/hashing_test.go
index 44726c9cbb..294a3977d0 100644
--- a/core/types/hashing_test.go
+++ b/core/types/hashing_test.go
@@ -197,7 +197,7 @@ func printList(l types.DerivableList) {
 	for i := 0; i < l.Len(); i++ {
 		var buf bytes.Buffer
 		l.EncodeIndex(i, &buf)
-		fmt.Printf("\"0x%x\",\n", buf.Bytes())
+		fmt.Printf("\"%#x\",\n", buf.Bytes())
 	}
 	fmt.Printf("},\n")
 }
diff --git a/core/vm/jump_table.go b/core/vm/jump_table.go
index eef3b53d8c..2524c9c99c 100644
--- a/core/vm/jump_table.go
+++ b/core/vm/jump_table.go
@@ -63,7 +63,7 @@ type JumpTable [256]*operation
 func validate(jt JumpTable) JumpTable {
 	for i, op := range jt {
 		if op == nil {
-			panic(fmt.Sprintf("op 0x%x is not set", i))
+			panic(fmt.Sprintf("op %#x is not set", i))
 		}
 		// The interpreter has an assumption that if the memorySize function is
 		// set, then the dynamicGas function is also set. This is a somewhat
diff --git a/core/vm/opcodes.go b/core/vm/opcodes.go
index 19252b01f2..77d619abb9 100644
--- a/core/vm/opcodes.go
+++ b/core/vm/opcodes.go
@@ -392,7 +392,7 @@ var opCodeToString = map[OpCode]string{
 func (op OpCode) String() string {
 	str := opCodeToString[op]
 	if len(str) == 0 {
-		return fmt.Sprintf("opcode 0x%x not defined", int(op))
+		return fmt.Sprintf("opcode %#x not defined", int(op))
 	}
 
 	return str
diff --git a/core/vm/runtime/runtime_test.go b/core/vm/runtime/runtime_test.go
index ca4e648436..627edae077 100644
--- a/core/vm/runtime/runtime_test.go
+++ b/core/vm/runtime/runtime_test.go
@@ -503,7 +503,7 @@ func TestEip2929Cases(t *testing.T) {
 		it := asm.NewInstructionIterator(code)
 		for it.Next() {
 			if it.Arg() != nil && 0 < len(it.Arg()) {
-				instrs = append(instrs, fmt.Sprintf("%v 0x%x", it.Op(), it.Arg()))
+				instrs = append(instrs, fmt.Sprintf("%v %#x", it.Op(), it.Arg()))
 			} else {
 				instrs = append(instrs, fmt.Sprintf("%v", it.Op()))
 			}
@@ -511,7 +511,7 @@ func TestEip2929Cases(t *testing.T) {
 		ops := strings.Join(instrs, ", ")
 		fmt.Printf("### Case %d\n\n", id)
 		id++
-		fmt.Printf("%v\n\nBytecode: \n```\n0x%x\n```\nOperations: \n```\n%v\n```\n\n",
+		fmt.Printf("%v\n\nBytecode: \n```\n%#x\n```\nOperations: \n```\n%v\n```\n\n",
 			comment,
 			code, ops)
 		Execute(code, nil, &Config{
diff --git a/eth/api.go b/eth/api.go
index b5053095a2..5d159108e6 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -316,7 +316,7 @@ func (api *DebugAPI) GetBadBlocks(ctx context.Context) ([]*BadBlockArgs, error)
 		if rlpBytes, err := rlp.EncodeToBytes(block); err != nil {
 			blockRlp = err.Error() // Hacky, but hey, it works
 		} else {
-			blockRlp = fmt.Sprintf("0x%x", rlpBytes)
+			blockRlp = fmt.Sprintf("%#x", rlpBytes)
 		}
 		if blockJSON, err = ethapi.RPCMarshalBlock(block, true, true, api.eth.APIBackend.ChainConfig()); err != nil {
 			blockJSON = map[string]interface{}{"error": err.Error()}
diff --git a/eth/api_test.go b/eth/api_test.go
index 39a1d58460..aae04eaa90 100644
--- a/eth/api_test.go
+++ b/eth/api_test.go
@@ -213,7 +213,7 @@ func TestStorageRangeAt(t *testing.T) {
 			t.Error(err)
 		}
 		if !reflect.DeepEqual(result, test.want) {
-			t.Fatalf("wrong result for range 0x%x.., limit %d:\ngot %s\nwant %s",
+			t.Fatalf("wrong result for range %#x.., limit %d:\ngot %s\nwant %s",
 				test.start, test.limit, dumper.Sdump(result), dumper.Sdump(&test.want))
 		}
 	}
diff --git a/eth/filters/api_test.go b/eth/filters/api_test.go
index 02229a7549..0a80d0f8dd 100644
--- a/eth/filters/api_test.go
+++ b/eth/filters/api_test.go
@@ -56,7 +56,7 @@ func TestUnmarshalJSONNewFilterArgs(t *testing.T) {
 
 	// from, to block number
 	var test1 FilterCriteria
-	vector := fmt.Sprintf(`{"fromBlock":"0x%x","toBlock":"0x%x"}`, fromBlock, toBlock)
+	vector := fmt.Sprintf(`{"fromBlock":"%#x","toBlock":"%#x"}`, fromBlock, toBlock)
 	if err := json.Unmarshal([]byte(vector), &test1); err != nil {
 		t.Fatal(err)
 	}
diff --git a/eth/tracers/logger/logger.go b/eth/tracers/logger/logger.go
index fe850d6b3e..bd326daaf6 100644
--- a/eth/tracers/logger/logger.go
+++ b/eth/tracers/logger/logger.go
@@ -224,7 +224,7 @@ func (l *StructLogger) CaptureEnd(output []byte, gasUsed uint64, t time.Duration
 	l.output = output
 	l.err = err
 	if l.cfg.Debug {
-		fmt.Printf("0x%x\n", output)
+		fmt.Printf("%#x\n", output)
 		if err != nil {
 			fmt.Printf(" error: %v\n", err)
 		}
@@ -346,11 +346,11 @@ func NewMarkdownLogger(cfg *Config, writer io.Writer) *mdLogger {
 func (t *mdLogger) CaptureStart(env *vm.EVM, from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) {
 	t.env = env
 	if !create {
-		fmt.Fprintf(t.out, "From: `%v`\nTo: `%v`\nData: `0x%x`\nGas: `%d`\nValue `%v` wei\n",
+		fmt.Fprintf(t.out, "From: `%v`\nTo: `%v`\nData: `%#x`\nGas: `%d`\nValue `%v` wei\n",
 			from.String(), to.String(),
 			input, gas, value)
 	} else {
-		fmt.Fprintf(t.out, "From: `%v`\nCreate at: `%v`\nData: `0x%x`\nGas: `%d`\nValue `%v` wei\n",
+		fmt.Fprintf(t.out, "From: `%v`\nCreate at: `%v`\nData: `%#x`\nGas: `%d`\nValue `%v` wei\n",
 			from.String(), to.String(),
 			input, gas, value)
 	}
@@ -387,7 +387,7 @@ func (t *mdLogger) CaptureFault(pc uint64, op vm.OpCode, gas, cost uint64, scope
 }
 
 func (t *mdLogger) CaptureEnd(output []byte, gasUsed uint64, tm time.Duration, err error) {
-	fmt.Fprintf(t.out, "\nOutput: `0x%x`\nConsumed gas: `%d`\nError: `%v`\n",
+	fmt.Fprintf(t.out, "\nOutput: `%#x`\nConsumed gas: `%d`\nError: `%v`\n",
 		output, gasUsed, err)
 }
 
diff --git a/internal/ethapi/api.go b/internal/ethapi/api.go
index b45c1f123f..1c76825326 100644
--- a/internal/ethapi/api.go
+++ b/internal/ethapi/api.go
@@ -1950,7 +1950,7 @@ func (api *DebugAPI) SeedHash(ctx context.Context, number uint64) (string, error
 	if block == nil {
 		return "", fmt.Errorf("block #%d not found", number)
 	}
-	return fmt.Sprintf("0x%x", ethash.SeedHash(number)), nil
+	return fmt.Sprintf("%#x", ethash.SeedHash(number)), nil
 }
 
 // ChaindbProperty returns leveldb properties of the key-value database.
diff --git a/mobile/types.go b/mobile/types.go
index a224f12ab2..f3f92e4d4a 100644
--- a/mobile/types.go
+++ b/mobile/types.go
@@ -55,7 +55,7 @@ func (n *Nonce) GetBytes() []byte {
 
 // GetHex retrieves the hex string representation of the block nonce.
 func (n *Nonce) GetHex() string {
-	return fmt.Sprintf("0x%x", n.nonce[:])
+	return fmt.Sprintf("%#x", n.nonce[:])
 }
 
 // String returns a printable representation of the nonce.
@@ -75,7 +75,7 @@ func (b *Bloom) GetBytes() []byte {
 
 // GetHex retrieves the hex string representation of the bloom filter.
 func (b *Bloom) GetHex() string {
-	return fmt.Sprintf("0x%x", b.bloom[:])
+	return fmt.Sprintf("%#x", b.bloom[:])
 }
 
 // String returns a printable representation of the bloom filter.
diff --git a/signer/core/apitypes/types.go b/signer/core/apitypes/types.go
index f5c2fe2f3d..7a5c7b8937 100644
--- a/signer/core/apitypes/types.go
+++ b/signer/core/apitypes/types.go
@@ -659,7 +659,7 @@ func formatPrimitiveValue(encType string, encValue interface{}) (string, error)
 		if b, err := parseInteger(encType, encValue); err != nil {
 			return "", err
 		} else {
-			return fmt.Sprintf("%d (0x%x)", b, b), nil
+			return fmt.Sprintf("%d (%#x)", b, b), nil
 		}
 	}
 	return "", fmt.Errorf("unhandled type %v", encType)
diff --git a/signer/core/signed_data.go b/signer/core/signed_data.go
index 48559bd98c..1b4e91cb6d 100644
--- a/signer/core/signed_data.go
+++ b/signer/core/signed_data.go
@@ -129,7 +129,7 @@ func (api *SignerAPI) determineSignatureFormat(ctx context.Context, contentType
 			{
 				Name:  "Full message for signing",
 				Typ:   "hexdata",
-				Value: fmt.Sprintf("0x%x", msg),
+				Value: fmt.Sprintf("%#x", msg),
 			},
 		}
 		req = &SignDataRequest{ContentType: mediaType, Rawdata: []byte(msg), Messages: messages, Hash: sighash}
@@ -161,7 +161,7 @@ func (api *SignerAPI) determineSignatureFormat(ctx context.Context, contentType
 			{
 				Name:  "Clique header",
 				Typ:   "clique",
-				Value: fmt.Sprintf("clique header %d [0x%x]", header.Number, header.Hash()),
+				Value: fmt.Sprintf("clique header %d [%#x]", header.Number, header.Hash()),
 			},
 		}
 		// Clique uses V on the form 0 or 1
diff --git a/tests/fuzzers/stacktrie/trie_fuzzer.go b/tests/fuzzers/stacktrie/trie_fuzzer.go
index 772c776436..363b0d47c4 100644
--- a/tests/fuzzers/stacktrie/trie_fuzzer.go
+++ b/tests/fuzzers/stacktrie/trie_fuzzer.go
@@ -185,7 +185,7 @@ func (f *fuzzer) fuzz() int {
 	sort.Sort(vals)
 	for _, kv := range vals {
 		if f.debugging {
-			fmt.Printf("{\"0x%x\" , \"0x%x\"} // stacktrie.Update\n", kv.k, kv.v)
+			fmt.Printf("{\"%#x\" , \"%#x\"} // stacktrie.Update\n", kv.k, kv.v)
 		}
 		trieB.Update(kv.k, kv.v)
 	}
diff --git a/tests/fuzzers/trie/trie-fuzzer.go b/tests/fuzzers/trie/trie-fuzzer.go
index 2301721c93..e8ad9fcf25 100644
--- a/tests/fuzzers/trie/trie-fuzzer.go
+++ b/tests/fuzzers/trie/trie-fuzzer.go
@@ -159,7 +159,7 @@ func runRandTest(rt randTest) error {
 			v := tr.Get(step.key)
 			want := values[string(step.key)]
 			if string(v) != want {
-				rt[i].err = fmt.Errorf("mismatch for key 0x%x, got 0x%x want 0x%x", step.key, v, want)
+				rt[i].err = fmt.Errorf("mismatch for key %#x, got %#x want %#x", step.key, v, want)
 			}
 		case opCommit:
 			_, _, rt[i].err = tr.Commit(nil)
diff --git a/trie/trie_test.go b/trie/trie_test.go
index ab65965b49..371bdf01c0 100644
--- a/trie/trie_test.go
+++ b/trie/trie_test.go
@@ -432,7 +432,7 @@ func runRandTest(rt randTest) bool {
 			v := tr.Get(step.key)
 			want := values[string(step.key)]
 			if string(v) != want {
-				rt[i].err = fmt.Errorf("mismatch for key 0x%x, got 0x%x want 0x%x", step.key, v, want)
+				rt[i].err = fmt.Errorf("mismatch for key %#x, got %#x want %#x", step.key, v, want)
 			}
 		case opCommit:
 			_, _, rt[i].err = tr.Commit(nil)