Task #5385: [mol] Do not crash when querying unused timers (useful when...

Task #5385: [mol] Do not crash when querying unused timers (useful when disabling kernels during debug sessions)

RTCP/Cobalt/GPUProc/src/cuda/gpu_wrapper.cc

@@ -802,7 +802,17 @@ namespace LOFAR
           ScopedCurrentContext scc(_context);
 
           float ms;
-          checkCuCall(cuEventElapsedTime(&ms, other, _event));
+
+          try {
+            checkCuCall(cuEventElapsedTime(&ms, other, _event));
+          } catch (LOFAR::Cobalt::gpu::CUDAException &ex) {
+            // Prevent crashes caused by querying unused timers
+            //
+            // NOTE: checkCuCall already logs the error
+
+            ms = 0.0f;
+          }
+
           return ms;
         }