TH::FindBin relation to a "discriminator 1" error

[adrian_sev]

Hi! In which conditions a FindBin method requested from a TH3D* can give an error ending with (discriminator 1) ?

The exact error is of the form:

[3943232:flow_base]:     my_test() [0x4760fc]:     _ZN9flow_base7processERKN2o23soa5TableINS0_3aod4HashILj519320931EEENS4_ILj1837103245EEES5_JNS2_INS4_ILj1373761118EEENS4_ILj4191360419EEENS4_ILj2286545062EEEJEEENS2_INS4_ILj254116537EEENS4_ILj3484684091EEES9_JEEENS1_8JoinFullIS6_JNSE_IS6_JNS2_INS4_ILj2330138363EEENS4_ILj652869314EEES9_JEEENS2_INS4_ILj558354758EEENS4_ILj620079319EEES9_JEEENS2_INS4_ILj1535033157EEENS4_ILj3179724803EEES9_JEEEEEENS2_INS4_ILj4055870789EEENS4_ILj3173777681EEES9_JEEENS2_INS4_ILj1713421420EEENS4_ILj4278781548EEES9_JEEENS2_INS4_ILj2437771125EEENS4_ILj2610283391EEES9_JEEENS2_INS4_ILj2807856041EEENS4_ILj348540052EEES9_JEEEEEENS2_INS4_ILj2009600272EEENS4_ILj1261423717EEES9_JEEEEE17TableIteratorBaseINS1_18DefaultIndexPolicyENSE_IS6_JSA_SD_S11_S14_EEEJSA_SD_S11_S14_EEERKNSE_IS6_JNS2_INS4_ILj1088132446EEENS4_ILj558318692EEES9_JEEENS2_INS4_ILj2509703062EEENS4_ILj4018839828EEES9_JEEEEEERKNS1_8FilteredINSE_IS6_JNSE_INS4_ILj3324719623EEEJNS2_INS4_ILj599863064EEENS4_ILj2944948204EEES9_JEEENS2_INS4_ILj3243953376EEES1M_NS4_ILj1926198916EEEJEEEEEE    NSE_INS4_ILj1274903626EEEJNS2_INS4_ILj184273500EEENS4_ILj1996537442EEES9_JEEENS2_INS4_ILj518516411EEES1U_S1R_JEEEEEENS2_INS4_ILj3189221742EEENS4_ILj2614466272EEES9_JEEENS2_INS4_ILj2486124941EEENS4_ILj2977027599EEES9_JEEEEEEEE at flowAnalysis3w.cxx:684 (discriminator 1)

and the referenced line is:

Int_t phiW_bin = wPhiH[zvt]->FindBin(tracketa, trackphi, t0cCentr);

where wPhiH is a std::vector<TH3D*> wPhiH;

if the pointer would have been null i would expect a segmentation fault .. but what is/means discriminator 1 ?
Thanks a lot!!

[Danilo]

Hi,

Thanks for the post. Bear with me, but I am having a hard time figuring out what the long mangled name means.
What ROOT version is this? How can we reproduce?

Cheers,
Danilo

[ferhue]

Are you sure that zwt is smaller than the size of the vector?

The printed error comes probably from root/interpreter/llvm-project/llvm/lib/DebugInfo/Symbolize/DIPrinter.cpp at a32e7d0eb6ff583c3420e32b4198d20cd7e8ebd4 · root-project/root · GitHub

[adrian_sev]

Hi! This is from within ALICE O2 software, and the used ROOT version is 6.32.06
I have no idea how to reproduce since the error shown point to this very normal (to me) line of code:
Int_t phiW_bin = wPhiH[zvt]->FindBin(tracketa, trackphi, t0cCentr);

About zvt size: zvt have [0, 9] interval integer values, and wPhiH it’s filled in a
for (int i = 0; i < 10; i++) loop so the the out of bounds problem could be excluded..

Now, studying closer the logs, i do have the message “Segmentation fault”
so i can only conclude that the accessed pointer is null, so i will start to hunt for that..

I apologize for the noise…
Adrian