diff options
Diffstat (limited to 'vm/vm.go')
| -rw-r--r-- | vm/vm.go | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -6,6 +6,7 @@ import ( "log" // for tracing only "reflect" // for optional CallX only "strconv" // for tracing only + "unsafe" // to allow setting unexported struct fields ) const debug = true @@ -184,7 +185,12 @@ func (m *Machine) Run() (err error) { case Fdup: mem = append(mem, mem[int(op[2])+fp-1]) case Field: - mem[sp-1].Data = mem[sp-1].Data.FieldByIndex(slint(op[2:])) + fv := mem[sp-1].Data.FieldByIndex(slint(op[2:])) + if !fv.CanSet() { + // Normally private fields can not bet set via reflect. Override this limitation. + fv = reflect.NewAt(fv.Type(), unsafe.Pointer(fv.UnsafeAddr())).Elem() + } + mem[sp-1].Data = fv case Jump: ip += int(op[2]) continue |