[AddressResolver] Add a check in shutdown to avoid some crashes if so… (#35824)
* [AddressResolver] Add a check in shutdown to avoid some crashes if someone calls it multiple times
* Apply suggestion from code review.
Co-authored-by: Andrei Litvin <andy314@gmail.com>
---------
Co-authored-by: Boris Zbarsky <bzbarsky@apple.com>
Co-authored-by: Andrei Litvin <andy314@gmail.com>
diff --git a/src/lib/address_resolve/AddressResolve_DefaultImpl.cpp b/src/lib/address_resolve/AddressResolve_DefaultImpl.cpp
index 9888c96..2fc4e5a 100644
--- a/src/lib/address_resolve/AddressResolve_DefaultImpl.cpp
+++ b/src/lib/address_resolve/AddressResolve_DefaultImpl.cpp
@@ -248,6 +248,10 @@
void Resolver::Shutdown()
{
+ // mSystemLayer is set in ::Init, so if it's null that means the resolver
+ // has not been initialized or has already been shut down.
+ VerifyOrReturn(mSystemLayer != nullptr);
+
while (mActiveLookups.begin() != mActiveLookups.end())
{
auto current = mActiveLookups.begin();
