Return pc after VM error

2 files changed, 13 insertions, 1 deletions

diff --git a/pkg/lang/vm/errors.go b/pkg/lang/vm/errors.go
index d19604a..9859feb 100644
--- a/pkg/lang/vm/errors.go
+++ b/pkg/lang/vm/errors.go
@@ -8,6 +8,15 @@ import (
 	"jinx/pkg/lang/vm/value"
 )
 
+type Error struct {
+	Pc  int
+	Err error
+}
+
+func (e Error) Error() string {
+	return fmt.Sprintf("vm error at pc %d: %s", e.Pc, e.Err)
+}
+
 // Fatal errors
 
 var (
diff --git a/pkg/lang/vm/vm.go b/pkg/lang/vm/vm.go
index c538841..0de8fb9 100644
--- a/pkg/lang/vm/vm.go
+++ b/pkg/lang/vm/vm.go
@@ -34,7 +34,10 @@ func (vm *VM) Run() error {
 		vm.pc += advance
 
 		if decision, err := vm.step(op); err != nil {
-			return err
+			return Error{
+				Pc:  vm.pc,
+				Err: err,
+			}
 		} else if decision == stepDecisionHalt {
 			return nil
 		}