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Issues with single dataset treated as multiple ones #9

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Use --rebase to avoid the merge commit.

wverkerke and others added 30 commits September 12, 2013 18:09
    - Allow clone() to take null-ptr as argument (implies same object name)
      Save on CPU performance in string manipulation when cloning object trees.

    - Make setExpensiveObjectCache() virtual so that it can be overloaded in RooRealVar
      [ fixes JIRA-5502 ]

    - Make copy ctor accept null-ptr as name argument

    - In redirectServers() change algorithm to prevent proxy self-reference to not longer
      use temporary sets - this saves enormously in the complexity of tree cloning operations
      as redirectServers() is N^2 operation in tree cloning
    - In RooAbsCollection::remove() by name, use comparison of
      unique TNamed* pointers instead of string comparison
      to match names.
    - Trim verbosity of reporting on cached or cache-and-tracked nodes: if there are
      more than 20, just report the total number

    - Remove some obsolete code that was already commented out
    - Cosmetics
    - Add code that identifies binned probability models of the form created by HistFactory
      (a RooRealSum of RooHistFuncs, optionally multiplied with one or more subsidiary models)
      and allow optionally calculate these as a fully binned likelihood calculation.
      To trigger this calculation each identified model must additional carry a Boolean
      attribute "BinnedLikelihood". This code is introduced as a transition to proper
      modeling of binned likelihoods and probabilities in RooFit 4.0

    - Add flag to create() virtual copy ctor to indicate binned likelihood calculation mode
    - Implement protection against cyclical reference to object owner here
      [ moved from RooAbsArg::redirectServers() ]
    - Follow interface change in create()
    - Don't use nptr comparison in bucket lists as that causes unwanted recursion
    - Add workspaceStreamerHook() and modify Streamer() to forcibly load embbeded RooDataHist object
      as embedded dataset in the workspace. This makes the embedded histogram visible to the user
      and automatically take are of expensive object cache redirections of these objects
    - Add code that reintreprets pdfs marked as 'binned likelihood' as yield
      vectors (divided by bin-width) for a Poisson product model and evaluates the log-L in the corresponding
      approach. In this approach no explicit normalization of the 'binned pdf'
      needs to be calculated, saving time and logistics.
    - Performance optimization: replace chained if() with a switch,
      replace .at() with [] to avoid repeated bounds-checking

    - Remove largs swaths of commented out obsolete code
    - Performance optimization: replace chained if() with a switch,
      replace .at() with [] to avoid repeated bounds-checking

    - Remove largs swaths of commented out obsolete code

    - Performance tuning of icode=4 algorithm: avoid unnecessary
      multiplications by contracting these in precalculated constants,
      calculate higher powers of x in terms of previously calculated
      powers, improve internal if() chain to converge faster
      Add comment to NOT touch this code --> this segment of code
      dominates HistFactory CPU performance in many use cases.
    - Add option to use name-ptr comparison for lookup-by-name instead
      of using TString::Compare() [ this is much faster ]. This option
      should only be used if all contained elements are of type RooAbsArg
    - Declare selfNormalized() if attribute BinnedLikelihood is set
      (this will prevent any attempt at normalization calculation,
      which are not needed when interpreted as yield vector
      for binned likelihoods)
    - Overload setExpensiveObjectCache() so that a RRV will never have one
      (it is not needed and saves a ton of pointers that would otherwise
       need to be persisted in workspace)
    - In RealVector::addReal() use nptr comparison for name
      matching to make it faster
    - Add separate storage area for 'embedded data', i.e. RooDataHist and RooDataSet
      elements attached to RooAbsArgs (such a RooHistFunc/Pdf) these are then explicitly
      accessible through the embeddedData() method and visible with Print()

    - When importing data objects, explicitly iterate over buffer objects and
      associate their expensive object cache with that of the workspace
    - Modify importWorkspaceHook() such that associated data objects are now
      stored in the 'embedded data' store rather than in the main store
    - Prevent self-reference to owner here (moved from RooAbsArg::redirectServers())
Avoid race condition when moving from one TFile to another in a TChain by using a TSemaphore to mark the fact that there are still some prefetch requests in flight. By using this we ensure that the TTreeCache ( i.e. also the TFilePrefetch obj) is moved to the next file only when all in-flight requests are received. There are three things we need to take care of when moving the cache:
- make sure the async thread is not doing any work
- clear all blocks from prefetching and read list
- reset the file pointer in the prefetch obj

This was discovered when testing Prefeching on Alice jobs.  While using it on TChains, we discovered a race condition which was quite hard to replicate on a simple test machine and required some traffic shaping to spot it.

[From Elvin]
If a read rule does not a specific target, the corresponding StreamerElement
has a name that is not one of the data member (past or present) and thus
they need to be handled explicitly in TBranchElement::InitializeOffset.
A new 'bit' (kWholeObject) is introduced to explicitly distinguish those
type of StreamerElement.
…uteNormal. Added outside flag in TGeoBranchArray. Added SetLastSafety in TGeoNavigator.
couet and others added 14 commits September 18, 2013 11:12
When an UnZoom was performed on the Y-Axis any plot but an histogram,
the label axis size was reset.
…dBoost - this time, hopefully it is correct :)
The specified datasets string is checked to see if it corresponds to
one dataset only. If not, it is broken into pieces (with "|," as
separators) and each token is considered a separated dataset name.

This should fix an issue where a single dataset name might contain
commas.
Unparsed portions in data specification trigger an error. Also, some
generic functions have been declared static.
@dberzano
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Latest commit (2ce6b86) fixes the stressProof issue with multiple datasets and entry lists specified (sorry...)

@dberzano
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FYI: I have just run the full stressProof with PROOF-Lite and it passes all tests.

gganis pushed a commit that referenced this pull request Mar 15, 2018
In the example below, thread #11 is waiting on the ‘AppKit lock’ while thread #1 is waiting on the ROOT read lock and thread root-project#12 is waiting on the ROOT write lock.

In thread #11, the ROOT write lock is taken/held by frame #9, TCanvas::Update, to ‘serialize’ the update to the windowing system.

In thread #1, the ‘AppKit lock’ is likely taken/held by a frame in the root-project#16 to root-project#40 range.

This commit remove the dead lock by removing the unnecessary use of code needing the ROOT lock within code run under the AppKit lock so that in they case thread #1 no longer need to wait for the ROOT (read) lock.

In addition it should be investigated whether the ROOT (write) lock should be taken in thread #1, frame 1 (TMacOSXSystem::ProcessPendingEvents) for the same reason it is taken in TCanvas::Update.

  thread #11
    frame #0: 0x00007fffab109bf2 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fffab1f57fa libsystem_pthread.dylib`_pthread_cond_wait + 712
    frame #2: 0x00007fff93394e34 AppKit`-[NSViewHierarchyLock lockForReadingWithExceptionHandler:] + 287
    frame #3: 0x00007fff934948ae AppKit`-[NSWindow _copyAcquiredViewHierarchyLock] + 126
    frame #4: 0x00007fff9349442c AppKit`-[NSView lockFocusIfCanDraw] + 159
    frame #5: 0x000000011c09063d libGCocoa.so`ROOT::MacOSX::X11::CommandBuffer::Flush(this=0x0000000100dbb080, impl=0x0000000100dbb000) at X11Buffer.mm:550
    frame #6: 0x000000011c04e9c4 libGCocoa.so`TGCocoa::Update(this=0x0000000100ad1bc0, mode=1) at TGCocoa.mm:536
    frame #7: 0x000000011c04ff3e libGCocoa.so`TGCocoa::UpdateWindow(this=0x0000000100ad1bc0, (null)=1) at TGCocoa.mm:776
    frame #8: 0x000000011ad70827 libGpad.so`TCanvas::Flush(this=0x000000012274e740) at TCanvas.cxx:1096
    frame #9: 0x000000011ad7830f libGpad.so`TCanvas::Update(this=0x000000012274e740) at TCanvas.cxx:2287
    frame #10: 0x0000000100fe4e86 threadsh2_C.so`handle2((null)=0x0000000000000001) at threadsh2.C:105
    frame #11: 0x0000000100f55680 libThread.so`TThread::Function(ptr=0x0000000122753b00) at TThread.cxx:821
    frame root-project#12: 0x00007fffab1f493b libsystem_pthread.dylib`_pthread_body + 180
    frame root-project#13: 0x00007fffab1f4887 libsystem_pthread.dylib`_pthread_start + 286
    frame root-project#14: 0x00007fffab1f408d libsystem_pthread.dylib`thread_start + 13

  thread #1, queue = 'com.apple.main-thread', stop reason = signal SIGSTOP
    frame #0: 0x00007fffab109bf2 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fffab1f57fa libsystem_pthread.dylib`_pthread_cond_wait + 712
    frame #2: 0x00007fffa9b734cd libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 47
    frame #3: 0x0000000100f76b6f libThread.so`void std::__1::condition_variable_any::wait<std::__1::unique_lock<std::__1::mutex> >(this=0x0000000122753a28, __lock=0x00007fff5fbf5cf8) at condition_variable:202
    frame #4: 0x0000000100f6887e libThread.so`ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::ReadLock() [inlined] void std::__1::condition_variable_any::wait<std::__1::unique_lock<std::__1::mutex>, ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::ReadLock()::'lambda'()>(this=0x0000000122753a28, __lock=0x00007fff5fbf5cf8, __pred=(anonymous class) @ 0x00007fff5fbf5e08)::'lambda'()) at condition_variable:211
    frame #5: 0x0000000100f68857 libThread.so`ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::ReadLock(this=0x00000001227539d8) at TReentrantRWLock.cxx:95
    frame #6: 0x0000000100f5c719 libThread.so`ROOT::TRWMutexImp<std::__1::mutex, ROOT::Internal::RecurseCounts>::ReadLock(this=0x00000001227539d0) at TRWMutexImp.cxx:33
    frame #7: 0x00000001000f52d1 libCore.so`ROOT::TReadLockGuard::TReadLockGuard(this=0x00007fff5fbf5f48, mutex=0x00000001227539d0) at TVirtualRWMutex.h:89
    frame #8: 0x00000001000f275d libCore.so`ROOT::TReadLockGuard::TReadLockGuard(this=0x00007fff5fbf5f48, mutex=0x00000001227539d0) at TVirtualRWMutex.h:88
    frame #9: 0x00000001002fcebf libCore.so`THashTable::FindObject(this=0x0000000100b0e120, name="TGTextView") const at THashTable.cxx:242
    frame #10: 0x00000001003a67fd libCore.so`TClass::GetClass(name="TGTextView", load=true, silent=true) at TClass.cxx:2900
    frame #11: 0x00000001003c9e16 libCore.so`TClass::InheritsFrom(this=0x0000000118fe1250, classname="TGTextView") const at TClass.cxx:4683
    frame root-project#12: 0x000000010024cb6e libCore.so`TObject::InheritsFrom(this=0x0000000126908de0, classname="TGTextView") const at TObject.cxx:445
    frame root-project#13: 0x000000011c03e47f libGCocoa.so`ROOT::MacOSX::X11::ViewIsTextView(viewID=116) at QuartzWindow.mm:899
    frame root-project#14: 0x000000011c03e518 libGCocoa.so`ROOT::MacOSX::X11::ViewIsTextView(view=0x0000000126908ee0) at QuartzWindow.mm:907
    frame root-project#15: 0x000000011c04706c libGCocoa.so`::-[QuartzView drawRect:](self=0x0000000126908ee0, _cmd="drawRect:", dirtyRect=(origin = (x = 0, y = 0), size = (width = 29, height = 21))) at QuartzWindow.mm:2728
    frame root-project#16: 0x00007fff934a4f99 AppKit`-[NSView _drawRect:clip:] + 2276
    frame root-project#17: 0x00007fff934f4f2f AppKit`-[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 1753
    frame root-project#18: 0x00007fff934f539a AppKit`-[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2884
    frame root-project#19: 0x00007fff934f539a AppKit`-[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2884
    frame root-project#20: 0x00007fff934f539a AppKit`-[NSView _recursiveDisplayAllDirtyWithLockFocus:visRect:] + 2884
    frame root-project#21: 0x00007fff934a2ad2 AppKit`-[NSView _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 837
    frame root-project#22: 0x00007fff934a22af AppKit`-[NSThemeFrame _recursiveDisplayRectIfNeededIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:topView:] + 334
    frame root-project#23: 0x00007fff934a06d8 AppKit`-[NSView _displayRectIgnoringOpacity:isVisibleRect:rectIsVisibleRectForView:] + 2452
    frame root-project#24: 0x00007fff9349bfca AppKit`-[NSView displayIfNeeded] + 1748
    frame root-project#25: 0x00007fff9349b8db AppKit`-[NSWindow displayIfNeeded] + 230
    frame root-project#26: 0x00007fff93bfbcb4 AppKit`___NSWindowGetDisplayCycleObserver_block_invoke.6228 + 277
    frame root-project#27: 0x00007fff9349b3b9 AppKit`__37+[NSDisplayCycle currentDisplayCycle]_block_invoke + 454
    frame root-project#28: 0x00007fff9b384cc6 QuartzCore`CA::Transaction::run_commit_handlers(CATransactionPhase) + 46
    frame root-project#29: 0x00007fff9b48e8ac QuartzCore`CA::Context::commit_transaction(CA::Transaction*) + 160
    frame root-project#30: 0x00007fff9b3837a1 QuartzCore`CA::Transaction::commit() + 475
    frame root-project#31: 0x00007fff9377e8b1 AppKit`__37+[NSDisplayCycle currentDisplayCycle]_block_invoke.31 + 323
    frame root-project#32: 0x00007fff95874d37 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 23
    frame root-project#33: 0x00007fff95874ca7 CoreFoundation`__CFRunLoopDoObservers + 391
    frame root-project#34: 0x00007fff958556d9 CoreFoundation`__CFRunLoopRun + 873
    frame root-project#35: 0x00007fff95855114 CoreFoundation`CFRunLoopRunSpecific + 420
    frame root-project#36: 0x00007fff94db5ebc HIToolbox`RunCurrentEventLoopInMode + 240
    frame root-project#37: 0x00007fff94db5bf9 HIToolbox`ReceiveNextEventCommon + 184
    frame root-project#38: 0x00007fff94db5b26 HIToolbox`_BlockUntilNextEventMatchingListInModeWithFilter + 71
    frame root-project#39: 0x00007fff9334ca54 AppKit`_DPSNextEvent + 1120
    frame root-project#40: 0x00007fff93ac87ee AppKit`-[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 2796
    frame root-project#41: 0x0000000100491031 libCore.so`TMacOSXSystem::ProcessPendingEvents(this=0x0000000100c06d60) at TMacOSXSystem.mm:473
    frame root-project#42: 0x000000010049097d libCore.so`TMacOSXSystem::DispatchOneEvent(this=0x0000000100c06d60, pendingOnly=true) at TMacOSXSystem.mm:365
    frame root-project#43: 0x0000000100294f4b libCore.so`TSystem::ProcessEvents(this=0x0000000100c06d60) at TSystem.cxx:429
    frame root-project#44: 0x0000000100fe5844 threadsh2_C.so`threadsh2() at threadsh2.C:196
    frame root-project#45: 0x0000000100fec06a
    frame root-project#46: 0x0000000103d7dc2f libCling.so`cling::IncrementalExecutor::executeWrapper(this=0x0000000100a1d410, function=(Data = "_Z15__cling_Un1Qu30Pv", Length = 21), returnValue=0x00007fff5fbfbde0) at IncrementalExecutor.h:196
    frame root-project#47: 0x0000000103d7db1f libCling.so`cling::Interpreter::RunFunction(this=0x0000000100a0e3b0, FD=0x000000011780f6b0, res=0x00007fff5fbfbde0) at Interpreter.cpp:980
    frame root-project#48: 0x0000000103d7a92a libCling.so`cling::Interpreter::EvaluateInternal(this=0x0000000100a0e3b0, input="threadsh2()", CO=CompilationOptions @ 0x00007fff5fbfaae8, V=0x00007fff5fbfbde0, T=0x0000000000000000, wrapPoint=44) at Interpreter.cpp:1232
    frame root-project#49: 0x0000000103d79e27 libCling.so`cling::Interpreter::process(this=0x0000000100a0e3b0, input="threadsh2()", V=0x00007fff5fbfbde0, T=0x0000000000000000, disableValuePrinting=false) at Interpreter.cpp:684
    frame root-project#50: 0x0000000103e552a5 libCling.so`cling::MetaProcessor::process(this=0x0000000100b65aa0, input_line=(Data = "threadsh2()", Length = 11), compRes=0x00007fff5fbfb540, result=0x00007fff5fbfbde0, disableValuePrinting=false) at MetaProcessor.cpp:341
    frame root-project#51: 0x000000010397bd63 libCling.so`HandleInterpreterException(metaProcessor=0x0000000100b65aa0, input_line="threadsh2()", compRes=0x00007fff5fbfb540, result=0x00007fff5fbfbde0) at TCling.cxx:2053
    frame root-project#52: 0x000000010397a16e libCling.so`TCling::ProcessLine(this=0x0000000100a0de40, line=".X  /opt/build/root_builds/master.debug/tutorials/thread/./threadsh2.C+", error=0x00007fff5fbfd694) at TCling.cxx:2170
    frame root-project#53: 0x0000000103984436 libCling.so`TCling::ProcessLineSynch(this=0x0000000100a0de40, line=".X  /opt/build/root_builds/master.debug/tutorials/thread/./threadsh2.C+", error=0x00007fff5fbfd694) at TCling.cxx:3044
    frame root-project#54: 0x00000001001f3133 libCore.so`TApplication::ExecuteFile(file="threadsh2.C+", error=0x00007fff5fbfd694, keep=false) at TApplication.cxx:1143
    frame root-project#55: 0x00000001001f19e0 libCore.so`TApplication::ProcessFile(this=0x0000000100b113e0, file="threadsh2.C+", error=0x00007fff5fbfd694, keep=false) at TApplication.cxx:1015
    frame root-project#56: 0x00000001001f138f libCore.so`TApplication::ProcessLine(this=0x0000000100b113e0, line=".x threadsh2.C+", sync=false, err=0x00007fff5fbfd694) at TApplication.cxx:988
    frame root-project#57: 0x000000010009878d libRint.so`TRint::ProcessLineNr(this=0x0000000100b113e0, filestem="ROOT_cli_", line=".x threadsh2.C+", error=0x00007fff5fbfd694) at TRint.cxx:756
    frame root-project#58: 0x0000000100097daf libRint.so`TRint::Run(this=0x0000000100b113e0, retrn=false) at TRint.cxx:416
    frame root-project#59: 0x00000001000027a4 root.exe`main(argc=1, argv=0x00007fff5fbff780) at rmain.cxx:30
    frame root-project#60: 0x00007fffaafdb235 libdyld.dylib`start + 1

  thread root-project#12
    frame #0: 0x00007fffab109bf2 libsystem_kernel.dylib`__psynch_cvwait + 10
    frame #1: 0x00007fffab1f57fa libsystem_pthread.dylib`_pthread_cond_wait + 712
    frame #2: 0x00007fffa9b734cd libc++.1.dylib`std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&) + 47
    frame #3: 0x0000000100f76b6f libThread.so`void std::__1::condition_variable_any::wait<std::__1::unique_lock<std::__1::mutex> >(this=0x0000000122753a28, __lock=0x0000700009f18898) at condition_variable:202
    frame #4: 0x0000000100f697b4 libThread.so`ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::WriteLock() [inlined] void std::__1::condition_variable_any::wait<std::__1::unique_lock<std::__1::mutex>, ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::WriteLock()::'lambda'()>(this=0x0000000122753a28, __lock=0x0000700009f18898, __pred=(anonymous class) @ 0x0000700009f18a28)::'lambda'()) at condition_variable:211
    frame #5: 0x0000000100f69790 libThread.so`ROOT::TReentrantRWLock<std::__1::mutex, ROOT::Internal::RecurseCounts>::WriteLock(this=0x00000001227539d8) at TReentrantRWLock.cxx:175
    frame #6: 0x0000000100f5c779 libThread.so`ROOT::TRWMutexImp<std::__1::mutex, ROOT::Internal::RecurseCounts>::WriteLock(this=0x00000001227539d0) at TRWMutexImp.cxx:42
    frame #7: 0x0000000100f57df6 libThread.so`ROOT::TVirtualRWMutex::Lock(this=0x00000001227539d0) at TVirtualRWMutex.h:52
    frame #8: 0x00000001039b2dd9 libCling.so`TLockGuard::TLockGuard(this=0x0000700009f18b48, mutex=0x00000001227539d0) at TVirtualMutex.h:85
    frame #9: 0x000000010397ba8d libCling.so`TLockGuard::TLockGuard(this=0x0000700009f18b48, mutex=0x00000001227539d0) at TVirtualMutex.h:85
    frame #10: 0x00000001039aa152 libCling.so`TCling::ClassInfo_Factory(this=0x0000000100a0de40, all=true) const at TCling.cxx:7216
    frame #11: 0x00000001004150ba libCore.so`TMethodCall::Init(this=0x0000700009f18d80, cl=0x0000000100af0470, method="Print", params="", objectIsConst=false) at TMethodCall.cxx:259
    frame root-project#12: 0x0000000100414ff3 libCore.so`TMethodCall::TMethodCall(this=0x0000700009f18d80, cl=0x0000000100af0470, method="Print", params="") at TMethodCall.cxx:62
    frame root-project#13: 0x000000010041519d libCore.so`TMethodCall::TMethodCall(this=0x0000700009f18d80, cl=0x0000000100af0470, method="Print", params="") at TMethodCall.cxx:61
    frame root-project#14: 0x0000000100fe471a threadsh2_C.so`handle1((null)=0x0000000000000000) at threadsh2.C:48
    frame root-project#15: 0x0000000100f55680 libThread.so`TThread::Function(ptr=0x0000000122754790) at TThread.cxx:821
    frame root-project#16: 0x00007fffab1f493b libsystem_pthread.dylib`_pthread_body + 180
    frame root-project#17: 0x00007fffab1f4887 libsystem_pthread.dylib`_pthread_start + 286
    frame root-project#18: 0x00007fffab1f408d libsystem_pthread.dylib`thread_start + 13
gganis pushed a commit that referenced this pull request Nov 28, 2018
…transactions.

This fixes https://sft.its.cern.ch/jira/browse/ROOT-9672 by having
cling::Interpreter::DeclareCFunction return the transaction containing the
compiled code.

With the previous code, cling::Interpreter::compileFunction will get confused by
transaction created during the callbacks executed during the
cling::IncrementalParser::commitTransaction of the main transaction.

Reproducer:

With a main composed of 'only':

int main(int argc, char ** argv)
{
  char const * class_string = (argc == 2) ? argv[1] : "std::vector<int>";
  auto const result [[gnu::unused]] = TClass::GetClass(class_string);
  return 0;
}

which is a representation of real use case (in a more complex setup) in ART.
We were getting:

Error in <TClingCallFunc::make_wrapper>: Failed to compile
  ==== SOURCE BEGIN ====
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wformat-security"
__attribute__((used)) extern "C" void __cf_0(void* obj, int nargs, void** args, void* ret)
{
   if (ret) {
      (*(TStreamerInfo**)ret) = new TStreamerInfo();
      return;
   }
   else {
      new TStreamerInfo();
      return;
   }
}
#pragma clang diagnostic pop
  ==== SOURCE END ====
Error in <TClingCallFunc::ExecT>: Called with no wrapper, not implemented!
Error in <TVirtualStreamerInfo::Factory>: The plugin handler for TVirtualStreamerInfo was found but failed to create the factory object!

The reason is that during TClingCallFunc::make_wrapper, the call to cling::Interpreter::compileFunction ends with:

    if (const llvm::GlobalValue* GV
        = getLastTransaction()->getModule()->getNamedValue(name))

However in the 'broken' case, the getLastTransaction does not return the transaction for the code being compiled by DeclareCFunction but instead the one used/created at:

#0  cling::IncrementalParser::endTransaction (this=0x4a2980, T=0x8c0fb0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/IncrementalParser.cpp:345
#1  0x00007fffeebc7899 in cling::Interpreter::PushTransactionRAII::pop (this=0x7fffffffcb00) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:111
#2  0x00007fffeebc785e in cling::Interpreter::PushTransactionRAII::~PushTransactionRAII (this=0x7fffffffcb00, __in_chrg=<optimized out>)
    at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:106
#3  0x00007fffeebeb659 in cling::LookupHelper::findScope (this=0x4a9dd0, className=..., diagOnOff=cling::LookupHelper::NoDiagnostics, resultType=0x7fffffffcd08, instantiateTemplate=false)
    at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/LookupHelper.cpp:466
#4  0x00007fffeeabe0df in TCling::CheckClassInfo (this=0x4a0550, name=<optimized out>, autoload=<optimized out>, isClassOrNamespaceOnly=<optimized out>)
    at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TCling.cxx:3630
#5  0x00007ffff7c3040d in TClass::Init (this=this@entry=0xdafd20, name=name@entry=0x7ffff7cb7638 "TGlobal", cversion=cversion@entry=2, typeinfo=typeinfo@entry=0x7ffff7d8b6d8 <typeinfo for TGlobal>, isa=isa@entry=0x477430,
    dfil=dfil@entry=0x7ffff7cb8cab "TGlobal.h", ifil=<optimized out>, dl=<optimized out>, il=<optimized out>, givenInfo=<optimized out>, silent=<optimized out>)
    at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TClass.cxx:1431
#6  0x00007ffff7c3a1b8 in TClass::TClass (this=0xdafd20, name=0x7ffff7cb7638 "TGlobal", cversion=<optimized out>, info=..., isa=0x477430, dfil=0x7ffff7cb8cab "TGlobal.h",
    ifil=0x7ffff7cccf88 "/local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TGlobal.cxx", dl=27, il=25, silent=false) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TClass.cxx:1273
#7  0x00007ffff7c3a72a in ROOT::CreateClass (cname=0x7ffff7cb7638 "TGlobal", id=id@entry=2, info=..., isa=isa@entry=0x477430, dfil=dfil@entry=0x7ffff7cb8cab "TGlobal.h",
    ifil=ifil@entry=0x7ffff7cccf88 "/local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TGlobal.cxx", dl=27, il=25) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TClass.cxx:5607
#8  0x00007ffff7c4b552 in ROOT::Internal::TDefaultInitBehavior::CreateClass (il=25, dl=27, ifil=0x7ffff7cccf88 "/local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TGlobal.cxx", dfil=0x7ffff7cb8cab "TGlobal.h",
    isa=0x477430, info=..., id=2, cname=<optimized out>, this=0x7ffff7da7508 <ROOT::Internal::DefineBehavior(void*, void*)::theDefault>) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/Rtypes.h:176
#9  ROOT::TGenericClassInfo::GetClass (this=0x7ffff7dab660 <ROOT::GenerateInitInstanceLocal(TGlobal const*)::instance>) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TGenericClassInfo.cxx:250
#10 0x00007ffff7b1a2d8 in TGlobal::Class () at /home/pcanal/root_builds/v6-14-00-patches/opt/core/base/G__Core.cxx:17156
#11 0x00007ffff7ac01de in TGlobal::IsA (this=0xee3bc0) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/TGlobal.h:48
root-project#12 TGlobal::CheckTObjectHashConsistency (this=0xee3bc0) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/TGlobal.h:48
root-project#13 0x00007ffff7be9dcd in TObject::CheckedHash (this=0xee3bc0) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/TObject.h:314
root-project#14 THashTable::GetCheckedHashValue (this=0xe65a20, obj=0xee3bc0) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/THashTable.h:94
root-project#15 THashTable::Add (this=0xe65a20, obj=0xee3bc0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/cont/src/THashTable.cxx:96
root-project#16 0x00007ffff7be6bf1 in THashList::AddLast (this=this@entry=0x5be690, obj=obj@entry=0xee3bc0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/cont/src/THashList.cxx:100
root-project#17 0x00007ffff7c4e0d1 in TListOfDataMembers::AddLast (this=0x5be690, obj=0xee3bc0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TListOfDataMembers.cxx:103
root-project#18 0x00007ffff7ab8785 in TList::Add (obj=0xee3bc0, this=0x5be690) at /home/pcanal/root_builds/v6-14-00-patches/opt/include/TList.h:87
root-project#19 TROOT::GetListOfGlobals (this=0x7ffff7da7a60 <ROOT::Internal::GetROOT1()::alloc>, load=load@entry=false) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/base/src/TROOT.cxx:1767
root-project#20 0x00007fffeeab1058 in TCling::HandleNewDecl (this=0x4a0550, DV=0xedf238, isDeserialized=isDeserialized@entry=true, modifiedTClasses=...) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TCling.cxx:555
root-project#21 0x00007fffeeabb785 in TCling::UpdateListsOnCommitted (this=0x4a0550, T=...) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TCling.cxx:6115
root-project#22 0x00007fffeebd0103 in cling::MultiplexInterpreterCallbacks::TransactionCommitted (this=0x57fe20, T=...) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/MultiplexInterpreterCallbacks.h:76
root-project#23 0x00007fffeed05d71 in cling::IncrementalParser::commitTransaction (this=0x4a2980, PRT=..., ClearDiagClient=true) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/IncrementalParser.cpp:532
root-project#24 0x00007fffeed06399 in cling::IncrementalParser::Compile (this=0x4a2980, input=..., Opts=...) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/IncrementalParser.cpp:663
root-project#25 0x00007fffeebcbc4e in cling::Interpreter::DeclareInternal (this=0x4a0f30, input=..., CO=..., T=0x7fffffffd680) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:1195
root-project#26 0x00007fffeebca8e8 in cling::Interpreter::declare (this=0x4a0f30, input=..., T=0x7fffffffd680) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:823
root-project#27 0x00007fffeebcb560 in cling::Interpreter::DeclareCFunction (this=0x4a0f30, name=..., code=..., withAccessControl=true) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:1096
root-project#28 0x00007fffeebcb862 in cling::Interpreter::compileFunction (this=0x4a0f30, name=..., code=..., ifUnique=false, withAccessControl=true)
    at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/interpreter/cling/lib/Interpreter/Interpreter.cpp:1140
root-project#29 0x00007fffeeafb83c in TClingCallFunc::compile_wrapper (withAccessControl=true, wrapper=..., wrapper_name=..., this=0xcf3c10) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TClingCallFunc.cxx:270
root-project#30 TClingCallFunc::make_wrapper (this=this@entry=0xcf3c10) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TClingCallFunc.cxx:1096
root-project#31 0x00007fffeeafbcb8 in TClingCallFunc::IFacePtr (this=this@entry=0xcf3c10) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TClingCallFunc.cxx:2233
root-project#32 0x00007fffeeafbe83 in TClingCallFunc::ExecT<long> (address=0x0, this=0xcf3c10) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TClingCallFunc.cxx:2045
root-project#33 TClingCallFunc::ExecInt (this=0xcf3c10, address=0x0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/metacling/src/TClingCallFunc.cxx:2065
root-project#34 0x00007ffff7c56e8d in TMethodCall::Execute (this=0xd97710, object=<optimized out>, retLong=@0x7fffffffd958: 0) at /local2/pcanal/cint_working/rootcling/v6-14-00-patches/core/meta/src/TMethodCall.cxx:457
root-project#35 0x0000000000401009 in TMethodCall::Execute(long&) ()
root-project#36 0x00000000004010ea in long TPluginHandler::ExecPluginImpl<>() ()
root-project#37 0x000000000040106d in long TPluginHandler::ExecPlugin<>(int) ()
root-project#38 0x0000000000400e21 in mytest() ()
root-project#39 0x0000000000400e92 in main ()
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