I am experiencing a bad_alloc error which occurs when I source ROOT with LCG 94a and beyond, but not with LCG 94. The version of ROOT in LCG 94 is 6.14/04, and the version in LCG 94a is 6.14/08.
I attach a minimal example to reproduce the problem, using a compiled .so of some source code (I have created two of them, one for each LCG version). To run:
python test.py X
where X = 94 or 94a.
The test script generates a simple RooDataSet, then reads it into a custom GenericDataSet object. I have also attached the source code for GenericDataSet. Even when I use the default GenericDataSet() constructor passing no arguments, I still get a “std::bad_alloc (C++ exception of type bad_alloc)” error.
I am unable to figure out what causes the bad_alloc error with ROOT 6.14/08 in LCG 94a. Any help to understand the problem would be much appreciated. I have tested under gcc8 and centos7 as well and see the same issue - if you require .so compiled for these architectures, I can provide them.
P.S. The GenericDataSet class inherits from RooDataSet. I notice that the RooDataSet.cxx code is different in 6.14/04 and 6.14/08, in particular there are edits to memory handling and the introduction of MemPoolForRooSets.h. Perhaps these updates have something to do with it?
_ROOT Version: 6.14/04 and 6.14/08
example.zip (609.3 KB)