Merge branch '598-particles-with-lifetime-zero-get-stuck-in-infinite-loop' into 'master'

Resolve "particles with lifetime zero get stuck in infinite loop"

Closes #598

See merge request !515

corsika/detail/framework/core/Cascade.inl

@@ -339,7 +339,8 @@ namespace corsika {
 
     auto const returnCode = sequence_.selectDecay(view, sample_process);
     if (returnCode != ProcessReturn::Decayed) {
-      CORSIKA_LOG_DEBUG("Particle did not decay!");
+      CORSIKA_LOG_ERROR("Particle {} did not decay!",
+                        get_name(view.getProjectile().getPID()));
     }
     setEventType(view, history::EventType::Decay);
     return returnCode;

src/framework/core/code_generator.py

@@ -53,7 +53,9 @@ def parsePythia(filename):
                 float(particle.attrib['mWidth']) * 1e-15 * 1000.0  # mm / s
         # those are certainly not stable....
         elif pdg_id in (0, 423, 433, 4312, 4322, 5112, 5222):
-            ctau = 0.
+            print("missing ctau0 or width for: " + str(pdg_id) + " " + str(name))
+            print("setting ctau to arbitrary small value..")
+            ctau = 1.e-15
         else:
             print("missing lifetime: " + str(pdg_id) + " " + str(name))
             sys.exit(1)