Merge branch '118-testcascade-and-cascade_example-segfault-in-release-type-build' into 'master'

Resolve "testCascade and cascade_example segfault in release-type build"

Closes #118

See merge request !53

CMakeLists.txt

@@ -39,7 +39,7 @@ endif(NOT CMAKE_BUILD_TYPE AND NOT CMAKE_CONFIGURATION_TYPES)
 # enable warnings and disallow non-standard language
 set(CMAKE_CXX_FLAGS "-Wall -pedantic -Wextra -Wno-ignored-qualifiers")
 set(CMAKE_CXX_FLAGS_DEBUG "-O0 -g")
-set(CMAKE_CXX_FLAGS_RELEASE "-O3") # -O2 would not trade speed for size, neither O2/3 use fast-math 
+set(CMAKE_CXX_FLAGS_RELEASE "-O3 -g") # -O2 would not trade speed for size, neither O2/3 use fast-math 
 
 # clang produces a lot of unecessary warnings without this:
 add_compile_options("$<$<CXX_COMPILER_ID:Clang>:-Wno-nonportable-include-path>") 

Framework/Cascade/Cascade.h

@@ -47,7 +47,7 @@ namespace corsika::cascade {
     void Run() {
       while (!fStack.IsEmpty()) {
         while (!fStack.IsEmpty()) {
-          Particle& pNext = *fStack.GetNextParticle();
+          auto pNext = fStack.GetNextParticle();
           Step(pNext);
         }
         // do cascade equations, which can put new particles on Stack,