Segfault relating to InstrumentView and possibly masking?

Original Reporter: @jzikovsky

Steps to reproduce:

LoadEventNexus('CNCS_7860_event.nxs', 'cncs')
Right-click workspace and choose instrument view
Go to mask tab
Mask out some detectors
Run LoadEventNexus with the same file and output workspace name again.
While LoadEventNexus, AFTER it has deleted the original workspace but BEFORE it has finished and replaced the workspace in the mantid workspace list, CLICK on where the workspace USED to be.
- I sometimes have to do the steps twice, but I didn't get it to crash without clicking on that spot.
Segfault.

Weird, I know. This is on Ubuntu 11.04

Thread [7] (Suspended: Signal 'SIGSEGV' received. Description: Segmentation fault.) 
    40 glIsList()  0x00007ffff0cd7f49   
    39 Mantid::Geometry::CacheGeometryRenderer::~CacheGeometryRenderer() CacheGeometryRenderer.cpp:32 0x00007ffff74082f1    
    38 Mantid::Geometry::CacheGeometryHandler::~CacheGeometryHandler() CacheGeometryHandler.cpp:34 0x00007ffff7407c35   
    37 Mantid::Geometry::CacheGeometryHandler::~CacheGeometryHandler() CacheGeometryHandler.cpp:35 0x00007ffff7407c9c   
    36 boost::checked_delete`<Mantid::Geometry::CacheGeometryHandler>`() checked_delete.hpp:34 0x00007ffff73e5440   
    35 boost::detail::sp_counted_impl_p`<Mantid::Geometry::CacheGeometryHandler>`::dispose() sp_counted_impl.hpp:78 0x00007ffff73e959c  
    34 boost::detail::sp_counted_base::release() sp_counted_base_gcc_x86.hpp:145 0x0000000000692fec 
    33 boost::detail::shared_count::~shared_count() shared_count.hpp:217 0x0000000000693065 
    32 boost::shared_ptr`<Mantid::Geometry::GeometryHandler>`::~shared_ptr() shared_ptr.hpp:169 0x00007ffff73e2a0c  
    31 Mantid::Geometry::Object::~Object() Object.cpp:120 0x00007ffff73dabcb    
    30 Mantid::API::Sample::~Sample() Sample.h:57 0x00007ffff6d724c1    
    29 boost::checked_delete`<Mantid::API::Sample>`() checked_delete.hpp:34 0x00007ffff6d7254f  
    28 boost::detail::sp_counted_impl_p`<Mantid::API::Sample>`::dispose() sp_counted_impl.hpp:78 0x00007ffff6d74618 
    27 boost::detail::sp_counted_base::release() sp_counted_base_gcc_x86.hpp:145 0x0000000000692fec 
    26 boost::detail::shared_count::~shared_count() shared_count.hpp:217 0x0000000000693065 
    25 boost::shared_ptr`<Mantid::API::Sample>`::~shared_ptr() shared_ptr.hpp:169 0x00007ffff6d6da4a    
    24 Mantid::Kernel::cow_ptr`<Mantid::API::Sample>`::~cow_ptr() cow_ptr.h:136 0x00007ffff6d6dabc  
    23 Mantid::API::ExperimentInfo::~ExperimentInfo() ExperimentInfo.cpp:50 0x00007ffff6d67e0f  
    22 Mantid::API::MatrixWorkspace::~MatrixWorkspace() MatrixWorkspace.cpp:57 0x00007ffff6db8c58   
    21 Mantid::API::IEventWorkspace::~IEventWorkspace() IEventWorkspace.h:39 0x00007fffd679da65 
    20 Mantid::DataObjects::EventWorkspace::~EventWorkspace() EventWorkspace.cpp:42 0x00007fffd67999b6  
    19 Mantid::DataObjects::EventWorkspace::~EventWorkspace() EventWorkspace.cpp:53 0x00007fffd6799a20  
    18 boost::checked_delete`<Mantid::DataObjects::EventWorkspace>`() checked_delete.hpp:34 0x00007fffd67a6b98  
    17 boost::detail::sp_counted_impl_p`<Mantid::DataObjects::EventWorkspace>`::dispose() sp_counted_impl.hpp:78 0x00007fffd67a6c20 
    16 boost::detail::sp_counted_base::release() sp_counted_base_gcc_x86.hpp:145 0x0000000000692fec 
    15 boost::detail::shared_count::~shared_count() shared_count.hpp:217 0x0000000000693065 
    14 boost::shared_ptr`<Mantid::API::IEventWorkspace>`::~shared_ptr() shared_ptr.hpp:169 0x0000000000931326   
    13 Mantid::Kernel::PropertyWithValue`<boost::shared_ptr<Mantid::API::IEventWorkspace>` >::operator=() PropertyWithValue.h:351 0x00007ffff6e2b2f4    
    12 Mantid::API::WorkspaceProperty`<Mantid::API::IEventWorkspace>`::operator=() WorkspaceProperty.h:115 0x00007ffff6e25459   
    11 Mantid::Kernel::IPropertyManager::setProperty`<boost::shared_ptr<Mantid::API::IEventWorkspace>` >() IPropertyManager.h:101 0x00007fffd4f54d95    
    10 Mantid::DataHandling::LoadEventNexus::exec() LoadEventNexus.cpp:770 0x00007fffd4f4a740   
    9 Mantid::API::Algorithm::execute() Algorithm.cpp:300 0x00007ffff6d15b4f    
    8 Mantid::API::Algorithm::executeAsyncImpl() Algorithm.cpp:1214 0x00007ffff6d1b1e2  
    7 Mantid::API::AlgorithmProxy::executeAsyncImpl() AlgorithmProxy.cpp:215 0x00007ffff6d487bb 
    6 Poco::ActiveRunnable`<bool, Poco::Void, Mantid::API::AlgorithmProxy>`::run() ActiveRunnable.h:85 0x00007ffff6d4aa40   
    5 Poco::PooledThread::run() ThreadPool.cpp:203 0x00007fffef054185   
    4 Poco::ThreadImpl::runnableEntry() Thread_POSIX.cpp:345 0x00007fffef050cbd 
    3 start_thread() pthread_create.c:304 0x00007fffecfded8c    
    2 clone() clone.S:112 0x00007fffed2dc04d    
    1 `<symbol is not available>` 0x0000000000000000

mantidproject / mantid

Segfault relating to InstrumentView and possibly masking? #4593