It's a bug since Prefix is shared between all iterator items and
appending is not enough. If prefix has enough capacity, then new slice
won't be created and the previous item's prefix will be changed.
This commit fixes the following test failure caused by moving from
bytes.Clone to slice.Copy:
```
--- FAIL: TestComlileAndInvokeFunction/test_Storage.Find (0.02s)
--- FAIL: TestComlileAndInvokeFunction/test_Storage.Find/keys_only (0.01s)
contract_test.go:866:
Error Trace: /home/anna/Documents/GitProjects/nspcc-dev/neo-go/cli/smartcontract/contract_test.go:866
Error: Not equal:
expected: []stackitem.Item{(*stackitem.ByteArray)(0xc000a1cdf8), (*stackitem.ByteArray)(0xc000a1ce10)}
actual : []stackitem.Item{(*stackitem.ByteArray)(0xc000a1cdb0), (*stackitem.ByteArray)(0xc000a1cdc8)}
Diff:
--- Expected
+++ Actual
@@ -2,3 +2,3 @@
(*stackitem.ByteArray)((len=8) {
- 00000000 66 69 6e 64 6b 65 79 31 |findkey1|
+ 00000000 66 69 6e 64 6b 65 79 32 |findkey2|
}),
Test: TestComlileAndInvokeFunction/test_Storage.Find/keys_only
--- FAIL: TestComlileAndInvokeFunction/test_Storage.Find/both (0.01s)
contract_test.go:881:
Error Trace: /home/anna/Documents/GitProjects/nspcc-dev/neo-go/cli/smartcontract/contract_test.go:881
Error: Not equal:
expected: []stackitem.Item{(*stackitem.ByteArray)(0xc000515920), (*stackitem.ByteArray)(0xc000515938)}
actual : []stackitem.Item{(*stackitem.ByteArray)(0xc000515848), (*stackitem.ByteArray)(0xc000515860)}
Diff:
--- Expected
+++ Actual
@@ -2,3 +2,3 @@
(*stackitem.ByteArray)((len=8) {
- 00000000 66 69 6e 64 6b 65 79 31 |findkey1|
+ 00000000 66 69 6e 64 6b 65 79 32 |findkey2|
}),
Test: TestComlileAndInvokeFunction/test_Storage.Find/both
```
Signed-off-by: Anna Shaleva <shaleva.ann@nspcc.ru>