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Diffstat (limited to 'ethchain/vm.go')
-rw-r--r--ethchain/vm.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/ethchain/vm.go b/ethchain/vm.go
index 58d1bee89..4fdf8b31a 100644
--- a/ethchain/vm.go
+++ b/ethchain/vm.go
@@ -456,7 +456,7 @@ func (vm *Vm) RunClosure(closure *Closure) (ret []byte, err error) {
case BYTE:
require(2)
val, th := stack.Popn()
- if th.Cmp(big.NewInt(32)) < 0 {
+ if th.Cmp(big.NewInt(32)) < 0 && th.Cmp(big.NewInt(int64(len(val.Bytes())))) < 0 {
byt := big.NewInt(int64(val.Bytes()[th.Int64()]))
stack.Push(byt)