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vm: do not fault on LEFT with big index

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Fixes #378.
This commit is contained in:
Evgenii 2019-09-09 17:05:40 +03:00
parent a039ae6cdb
commit 0b58ed4a22
2 changed files with 7 additions and 2 deletions
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3
pkg/vm/vm.go
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@ -315,6 +315,9 @@ func (v *VM) execute(ctx *Context, op Instruction) {
case LEFT:
l := int(v.estack.Pop().BigInt().Int64())
s := v.estack.Pop().Bytes()
if t := len(s); l > t {
l = t
}
v.estack.PushVal(s[:l])
case RIGHT:
l := int(v.estack.Pop().BigInt().Int64())