From 6c7ee4e8f3b6e3de121681ae93e14fd9e6e01c0d Mon Sep 17 00:00:00 2001
From: Stefan Seifert <nine@detonation.org>
Date: Sun, 7 Jun 2020 14:44:30 +0200
Subject: [PATCH] Add a method for clearing a cached index on a MAST::Frame

When frames are written to multiple bytecode streams, they must not retain
their cached indexes as those won't be valid for all streams.
---
 lib/MAST/Nodes.nqp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/MAST/Nodes.nqp b/lib/MAST/Nodes.nqp
index 8090748740..e920a274e2 100644
--- a/lib/MAST/Nodes.nqp
+++ b/lib/MAST/Nodes.nqp
@@ -959,6 +959,11 @@ class MAST::Frame is MAST::Node {
         }
     }
 
+    method clear_index() {
+        $!frame_idx := -1;
+        $!flags := nqp::bitand_i($!flags, nqp::bitneg_i($FRAME_FLAG_HAS_INDEX));
+    }
+
     method set_index(int $idx) {
         $!frame_idx := $idx;
         $!flags     := nqp::bitor_i($!flags, $FRAME_FLAG_HAS_INDEX);