fix an issue that a lambda of Node/Singleton could refer expired parent

2022-11-14 23:28:17 +09:00 · 2022-11-14 23:28:17 +09:00 · 7f6fd26c71
commit 7f6fd26c71
parent d72ade7b37
1 changed files with 2 additions and 0 deletions
--- a/file/node_singleton.cc
+++ b/file/node_singleton.cc
@ -178,6 +178,8 @@ class Singleton::Lambda final : public nf7::Node::Lambda,

  void Handle(const nf7::Node::Lambda::Msg& in) noexcept override {
    const auto p = parent();
+    if (!p) return;
+
    if (in.sender == shared_) {
      p->Handle(in.name, in.value, shared_from_this());
    } else if (in.sender == p) {