Run unit tests with sanitizers (fixes #6205)

Also fix memory leak in Net.Ipv4AndIpv6Work

Rust tests fail to link when building in san directory, works in source
directory.

.github/workflows/clang-sanitizer.yml

@@ -23,20 +23,17 @@ jobs:
         sudo apt-get install pkg-config cmake ninja-build libfreetype6-dev libnotify-dev libsdl2-dev libsqlite3-dev libavcodec-dev libavformat-dev libavutil-dev libswresample-dev libswscale-dev libx264-dev libvulkan-dev glslang-tools spirv-tools -y
     - name: Build with ASan and UBSan
       run: |
-        mkdir san
-        cd san
         export CC=clang
         export CXX=clang++
         export CXXFLAGS="-fsanitize=address,undefined -fsanitize-recover=address,undefined -fno-omit-frame-pointer"
         export CFLAGS="-fsanitize=address,undefined -fsanitize-recover=address,undefined -fno-omit-frame-pointer"
-        cmake -DCMAKE_BUILD_TYPE=Debug -DHEADLESS_CLIENT=ON ..
+        cmake -DCMAKE_BUILD_TYPE=Debug -DHEADLESS_CLIENT=ON -Werror=dev -DDOWNLOAD_GTEST=ON -DDEV=ON -DCMAKE_RUNTIME_OUTPUT_DIRECTORY_DEBUG=. .
         make -j"$(nproc)"
     - name: Run server and headless client with ASan and UBSan
       run: |
-        cd san
-        export UBSAN_OPTIONS=suppressions=../ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0
+        export UBSAN_OPTIONS=suppressions=./ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0
         export ASAN_OPTIONS=log_path=./SAN:print_stacktrace=1:check_initialization_order=1:detect_leaks=1:halt_on_errors=0
-        export LSAN_OPTIONS=suppressions=../lsan.supp
+        export LSAN_OPTIONS=suppressions=./lsan.supp
         ./DDNet "cl_download_skins 0;quit" || true
         ./DDNet-Server shutdown || true
         if test -n "$(find . -maxdepth 1 -name 'SAN.*' -print -quit)"
@@ -44,7 +41,11 @@ jobs:
           cat ./SAN.*
           exit 1
         fi
+    - name: Run unit tests with ASan and UBSan
+      run: |
+        export UBSAN_OPTIONS=suppressions=./ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0
+        cmake --build . --config Debug --target run_cxx_tests
+        # Rust tests work locally, but still not in CI, even with the same directory
     - name: Run integration tests with ASan and UBSan
       run: |
-        cd san
         make run_integration_tests

src/test/net.cpp

@@ -44,4 +44,7 @@ TEST(Net, Ipv4AndIpv6Work)
 	Addr.port = 0;
 	EXPECT_EQ(Addr, LocalhostV6);
 	EXPECT_EQ(mem_comp(pData, "def", 3), 0);
+
+	net_udp_close(Socket1);
+	net_udp_close(Socket2);
 }