test, bench: make prevector and checkqueue swap member functions noexcept

Reason:
A swap must not fail; when a class has a swap member function, it should be declared noexcept.
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#c84-a-swap-function-must-not-fail

1 files changed, 2 insertions, 1 deletions

diff --git a/src/test/prevector_tests.cpp b/src/test/prevector_tests.cpp
index 89814748fe..3977a3d548 100644
--- a/src/test/prevector_tests.cpp
+++ b/src/test/prevector_tests.cpp
@@ -165,7 +165,8 @@ public:
         test();
     }
 
-    void swap() {
+    void swap() noexcept
+    {
         real_vector.swap(real_vector_alt);
         pre_vector.swap(pre_vector_alt);
         test();