TVirtualFitter destructor problem

Dear experts,

When running a RooMinuit instance, I encounter the following problem:

root.exe(45813,0x7fffc90523c0) malloc: *** error for object 0x7f9f67ae1a00: pointer being freed was not allocated
*** set a breakpoint in malloc_error_break to debug

While running it in a python script, I could understand from the error log that it comes from the destructor of TVirtualFitter:

Application Specific Information:
abort() called
*** error for object 0x12ca53000: pointer being freed was not allocated

Thread 0 Crashed:: Dispatch queue:
0   libsystem_kernel.dylib        	0x00007fffc0333dd6 __pthread_kill + 10
1   libsystem_pthread.dylib       	0x00007fffc041f787 pthread_kill + 90
2   libsystem_c.dylib             	0x00007fffc0299420 abort + 129
3   libsystem_malloc.dylib        	0x00007fffc038903f free + 530
4   libdyld.dylib                 	0x00007fffc0203945 _tlv_atexit + 164
5                    	0x00000001091360b5 TVirtualFitter::~TVirtualFitter() + 133 (TVirtualFitter.cxx:41)
6                  	0x000000010631844f TFitter::~TFitter() + 79 (TFitter.cxx:51)
7              	0x00000001098f9426 RooMinuit::cleanup() + 22 (RooMinuit.cxx:91)
8              	0x00000001099506e9 CleanUpRooFitAtExit() + 9 (RooSentinel.cxx:53)
9   libsystem_c.dylib             	0x00007fffc029a17f __cxa_finalize_ranges + 339
10  libsystem_c.dylib             	0x00007fffc029a4b
2 exit + 55
11  libdyld.dylib                 	0x00007fffc020525c start + 8

A very simple example is attached to reproduce the problem. This is tested on macosx build from master and v6-08-02.
testTVF.C (790 Bytes)

Please let me know if you have any suggestion.




This is a known problem happening on MacOS. I reccomend you to use the
RooMinimizer class. We are going probably to deprecate the RooMinuit class.
It is not used anymore in RooAbsPdf::FitTo