From cb51d61a64f606df9436d74c3e78c407ade9dc95 Mon Sep 17 00:00:00 2001
From: ruby0x1 <ruby0x1@pm.me>
Date: Mon, 7 Dec 2020 12:34:31 -0800
Subject: [PATCH] fix unmarked compiler value causing memory issues

https://github.com/wren-lang/wren/issues/869
---
 src/vm/wren_compiler.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/vm/wren_compiler.c b/src/vm/wren_compiler.c
index 7b8b4be1..95c470dd 100644
--- a/src/vm/wren_compiler.c
+++ b/src/vm/wren_compiler.c
@@ -3638,6 +3638,7 @@ void wrenMarkCompiler(WrenVM* vm, Compiler* compiler)
 {
   wrenGrayValue(vm, compiler->parser->current.value);
   wrenGrayValue(vm, compiler->parser->previous.value);
+  wrenGrayValue(vm, compiler->parser->next.value);
 
   // Walk up the parent chain to mark the outer compilers too. The VM only
   // tracks the innermost one.