fix: address sanitizer failures (#956)

src/googletest.h

@@ -45,6 +45,7 @@
 #include <cstdlib>
 #include <ctime>
 #include <map>
+#include <new>
 #include <sstream>
 #include <string>
 #include <utility>
@@ -637,13 +638,21 @@ void (*g_new_hook)() = nullptr;
 
 _END_GOOGLE_NAMESPACE_
 
-void* operator new(size_t size) GOOGLE_GLOG_THROW_BAD_ALLOC {
+void* operator new(size_t size, const std::nothrow_t&) noexcept {
   if (GOOGLE_NAMESPACE::g_new_hook) {
     GOOGLE_NAMESPACE::g_new_hook();
   }
   return malloc(size);
 }
 
+void* operator new(size_t size) GOOGLE_GLOG_THROW_BAD_ALLOC {
+  void* p = ::operator new(size, std::nothrow);
+  if (p == nullptr) {
+    throw std::bad_alloc{};
+  }
+  return p;
+}
+
 void* operator new[](size_t size) GOOGLE_GLOG_THROW_BAD_ALLOC {
   return ::operator new(size);
 }

src/logging.cc

@@ -2268,7 +2268,9 @@ static bool SendEmailInternal(const char*dest, const char *subject,
       }
       sanitized_dests << s;
     }
-    dest = sanitized_dests.str().c_str();
+    // Avoid dangling reference
+    const std::string& tmp = sanitized_dests.str();
+    dest = tmp.c_str();
 
     if ( use_logging ) {
       VLOG(1) << "Trying to send TITLE:" << subject