diff --git a/internal/cmd/generator/vm.go.tmpl b/internal/cmd/generator/vm.go.tmpl
index ccbbfdd..5857249 100644
--- a/internal/cmd/generator/vm.go.tmpl
+++ b/internal/cmd/generator/vm.go.tmpl
@@ -190,12 +190,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				typ      *runtime.Type
 				ifacePtr unsafe.Pointer
 			)
+			up := ptrToUnsafePtr(p)
 			if code.Flags&encoder.NonEmptyInterfaceFlags != 0 {
-				iface := (*nonEmptyInterface)(ptrToUnsafePtr(p))
+				iface := (*nonEmptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.itab.typ
 			} else {
-				iface := (*emptyInterface)(ptrToUnsafePtr(p))
+				iface := (*emptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.typ
 			}
@@ -205,7 +206,7 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				code = code.Next
 				break
 			}
-			ctx.KeepRefs = append(ctx.KeepRefs, unsafe.Pointer(p))
+			ctx.KeepRefs = append(ctx.KeepRefs, up)
 			ifaceCodeSet, err := encoder.CompileToGetCodeSet(uintptr(unsafe.Pointer(typ)))
 			if err != nil {
 				return nil, err
diff --git a/internal/encoder/vm/vm.go b/internal/encoder/vm/vm.go
index ccbbfdd..5857249 100644
--- a/internal/encoder/vm/vm.go
+++ b/internal/encoder/vm/vm.go
@@ -190,12 +190,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				typ      *runtime.Type
 				ifacePtr unsafe.Pointer
 			)
+			up := ptrToUnsafePtr(p)
 			if code.Flags&encoder.NonEmptyInterfaceFlags != 0 {
-				iface := (*nonEmptyInterface)(ptrToUnsafePtr(p))
+				iface := (*nonEmptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.itab.typ
 			} else {
-				iface := (*emptyInterface)(ptrToUnsafePtr(p))
+				iface := (*emptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.typ
 			}
@@ -205,7 +206,7 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				code = code.Next
 				break
 			}
-			ctx.KeepRefs = append(ctx.KeepRefs, unsafe.Pointer(p))
+			ctx.KeepRefs = append(ctx.KeepRefs, up)
 			ifaceCodeSet, err := encoder.CompileToGetCodeSet(uintptr(unsafe.Pointer(typ)))
 			if err != nil {
 				return nil, err
diff --git a/internal/encoder/vm_color/vm.go b/internal/encoder/vm_color/vm.go
index b7f6560..73af884 100644
--- a/internal/encoder/vm_color/vm.go
+++ b/internal/encoder/vm_color/vm.go
@@ -190,12 +190,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				typ      *runtime.Type
 				ifacePtr unsafe.Pointer
 			)
+			up := ptrToUnsafePtr(p)
 			if code.Flags&encoder.NonEmptyInterfaceFlags != 0 {
-				iface := (*nonEmptyInterface)(ptrToUnsafePtr(p))
+				iface := (*nonEmptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.itab.typ
 			} else {
-				iface := (*emptyInterface)(ptrToUnsafePtr(p))
+				iface := (*emptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.typ
 			}
@@ -205,7 +206,7 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				code = code.Next
 				break
 			}
-			ctx.KeepRefs = append(ctx.KeepRefs, unsafe.Pointer(p))
+			ctx.KeepRefs = append(ctx.KeepRefs, up)
 			ifaceCodeSet, err := encoder.CompileToGetCodeSet(uintptr(unsafe.Pointer(typ)))
 			if err != nil {
 				return nil, err
diff --git a/internal/encoder/vm_color_indent/vm.go b/internal/encoder/vm_color_indent/vm.go
index 9e17654..7b7844e 100644
--- a/internal/encoder/vm_color_indent/vm.go
+++ b/internal/encoder/vm_color_indent/vm.go
@@ -190,12 +190,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				typ      *runtime.Type
 				ifacePtr unsafe.Pointer
 			)
+			up := ptrToUnsafePtr(p)
 			if code.Flags&encoder.NonEmptyInterfaceFlags != 0 {
-				iface := (*nonEmptyInterface)(ptrToUnsafePtr(p))
+				iface := (*nonEmptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.itab.typ
 			} else {
-				iface := (*emptyInterface)(ptrToUnsafePtr(p))
+				iface := (*emptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.typ
 			}
@@ -205,7 +206,7 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				code = code.Next
 				break
 			}
-			ctx.KeepRefs = append(ctx.KeepRefs, unsafe.Pointer(p))
+			ctx.KeepRefs = append(ctx.KeepRefs, up)
 			ifaceCodeSet, err := encoder.CompileToGetCodeSet(uintptr(unsafe.Pointer(typ)))
 			if err != nil {
 				return nil, err
diff --git a/internal/encoder/vm_indent/vm.go b/internal/encoder/vm_indent/vm.go
index ac1285a..6e05155 100644
--- a/internal/encoder/vm_indent/vm.go
+++ b/internal/encoder/vm_indent/vm.go
@@ -190,12 +190,13 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				typ      *runtime.Type
 				ifacePtr unsafe.Pointer
 			)
+			up := ptrToUnsafePtr(p)
 			if code.Flags&encoder.NonEmptyInterfaceFlags != 0 {
-				iface := (*nonEmptyInterface)(ptrToUnsafePtr(p))
+				iface := (*nonEmptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.itab.typ
 			} else {
-				iface := (*emptyInterface)(ptrToUnsafePtr(p))
+				iface := (*emptyInterface)(up)
 				ifacePtr = iface.ptr
 				typ = iface.typ
 			}
@@ -205,7 +206,7 @@ func Run(ctx *encoder.RuntimeContext, b []byte, codeSet *encoder.OpcodeSet) ([]b
 				code = code.Next
 				break
 			}
-			ctx.KeepRefs = append(ctx.KeepRefs, unsafe.Pointer(p))
+			ctx.KeepRefs = append(ctx.KeepRefs, up)
 			ifaceCodeSet, err := encoder.CompileToGetCodeSet(uintptr(unsafe.Pointer(typ)))
 			if err != nil {
 				return nil, err