Problem 1271

The erropropagation example has been failing on Windows intermittently. See one case in http://cdash.cern.ch/testDetails.php?test=12680&build=661
After debugging it on Windows I concluded that the problem is memory corruption. Running the test with Valgrind you get many memory errors. The first ones are attached. The problem is the deletion of G4navigator in G4ErrorPropagatorManager.cc:140 and it use later in the example. 


==72484== Invalid read of size 8
==72484==    at 0x1750668: G4SteppingManager::SetInitialStep(G4Track*) (G4SteppingManager.cc:303)
==72484==    by 0x1197113: G4ErrorPropagator::InitG4Track(G4ErrorTrajState&) (G4ErrorPropagator.cc:304)
==72484==    by 0x1197BE3: G4ErrorPropagator::Propagate(G4ErrorTrajState*, G4ErrorTarget const*, G4ErrorMode) (G4ErrorPropagator.cc:120)
==72484==    by 0x1199634: G4ErrorPropagatorManager::Propagate(G4ErrorTrajState*, G4ErrorTarget const*, G4ErrorMode) (G4ErrorPropagatorManager.cc:273)
==72484==    by 0x10000B51A: ProcessEvent(int, unsigned long) (errprop.cc:171)
==72484==    by 0x10000D5A4: main (errprop.cc:81)
==72484==  Address 0x1001be810 is 0 bytes inside a block of size 896 free'd
==72484==    at 0xC508: free (vg_replace_malloc.c:430)
==72484==    by 0x4F37D39: G4Navigator::~G4Navigator() (G4Navigator.cc:73)
==72484==    by 0x119A282: G4ErrorPropagatorManager::StartNavigator() (G4ErrorPropagatorManager.cc:140)
==72484==    by 0x119A5E5: G4ErrorPropagatorManager::G4ErrorPropagatorManager() (G4ErrorPropagatorManager.cc:100)
==72484==    by 0x119A622: G4ErrorPropagatorManager::GetErrorPropagatorManager() (G4ErrorPropagatorManager.cc:70)
==72484==    by 0x10000BD58: Initialize() (errprop.cc:95)
==72484==    by 0x10000D0AF: main (errprop.cc:60)
==72484== 
==72484== Invalid write of size 1
==72484==    at 0x4F3614C: G4Navigator::LocateGlobalPointAndSetup(CLHEP::Hep3Vector const&, CLHEP::Hep3Vector const*, bool, bool) (G4Navigator.cc:121)
==72484==    by 0x17506B4: G4SteppingManager::SetInitialStep(G4Track*) (G4SteppingManager.cc:303)
==72484==    by 0x1197113: G4ErrorPropagator::InitG4Track(G4ErrorTrajState&) (G4ErrorPropagator.cc:304)
==72484==    by 0x1197BE3: G4ErrorPropagator::Propagate(G4ErrorTrajState*, G4ErrorTarget const*, G4ErrorMode) (G4ErrorPropagator.cc:120)
==72484==    by 0x1199634: G4ErrorPropagatorManager::Propagate(G4ErrorTrajState*, G4ErrorTarget const*, G4ErrorMode) (G4ErrorPropagatorManager.cc:273)
==72484==    by 0x10000B51A: ProcessEvent(int, unsigned long) (errprop.cc:171)
==72484==    by 0x10000D5A4: main (errprop.cc:81)
==72484==  Address 0x1001be87d is 109 bytes inside a block of size 896 free'd
==72484==    at 0xC508: free (vg_replace_malloc.c:430)
==72484==    by 0x4F37D39: G4Navigator::~G4Navigator() (G4Navigator.cc:73)
==72484==    by 0x119A282: G4ErrorPropagatorManager::StartNavigator() (G4ErrorPropagatorManager.cc:140)
==72484==    by 0x119A5E5: G4ErrorPropagatorManager::G4ErrorPropagatorManager() (G4ErrorPropagatorManager.cc:100)
==72484==    by 0x119A622: G4ErrorPropagatorManager::GetErrorPropagatorManager() (G4ErrorPropagatorManager.cc:70)
==72484==    by 0x10000BD58: Initialize() (errprop.cc:95)
==72484==    by 0x10000D0AF: main (errprop.cc:60)