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-rw-r--r--ethvm/stack.go6
1 files changed, 3 insertions, 3 deletions
diff --git a/ethvm/stack.go b/ethvm/stack.go
index 82dd612c2..4ac023fb9 100644
--- a/ethvm/stack.go
+++ b/ethvm/stack.go
@@ -65,13 +65,13 @@ func (st *Stack) Peekn() (*big.Int, *big.Int) {
}
func (st *Stack) Swapn(n int) (*big.Int, *big.Int) {
- st.data[n], st.data[0] = st.data[0], st.data[n]
+ st.data[len(st.data)-n], st.data[len(st.data)-1] = st.data[len(st.data)-1], st.data[len(st.data)-n]
- return st.data[n], st.data[0]
+ return st.data[len(st.data)-n], st.data[len(st.data)-1]
}
func (st *Stack) Dupn(n int) *big.Int {
- st.Push(st.data[n])
+ st.Push(st.data[len(st.data)-n])
return st.Peek()
}