fix unmarked compiler value causing memory issues
@@ -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.
