[6.32/master] Fail to materialise simbols from `libMatrix`

[vepadulano]

Check duplicate issues.

• [ ] Checked for duplicates

Description

Any code run through TInterpreter::Declare that needs symbols from libMatrix ends up in

cling JIT session error: Failed to materialize symbols: { (main, { _ZN8TVectorTIfE8StreamerER7TBuffer, _ZN8TVectorTIfE8Delete_mEiRPf, _ZN8TVectorTIfE4DrawEPKc, _ZNK8TVectorTIfE5PrintEPKc, _ZN8TVectorTIfE5ClassEv }) }

See the simple reproducer below. Here is what I get with two different ROOT versions on lxplus:

ROOT 6.32.02 (LCG106)

[vpadulan@lxplus951 ~]$source /cvmfs/sft.cern.ch/lcg/views/LCG_106/x86_64-el9-gcc13-opt/setup.sh
[vpadulan@lxplus951 ~]$root --version
ROOT Version: 6.32.02
Built for linuxx8664gcc on Jun 19 2024, 05:05:49
From heads/master@tags/v6-32-02
[vpadulan@lxplus951 ~]$python repro_libphysics.py
cling JIT session error: Failed to materialize symbols: { (main, { _ZN8TVectorTIfE8StreamerER7TBuffer, _ZN8TVectorTIfE8Delete_mEiRPf, _ZN8TVectorTIfE4DrawEPKc, _ZNK8TVectorTIfE5PrintEPKc, _ZN8TVectorTIfE5ClassEv }) }
[runStaticInitializersOnce]: Failed to materialize symbols: { (main, { _ZL5myvec, _ZN8TStorage19FilledByObjectAllocEPVKj, _ZNSt13__atomic_baseIhEppEi, _ZN4ROOT8Internal22THashConsistencyHolderIRK8TVectorTIfEE17fgHashConsistencyE, __cxx_global_var_initcling_module_306_, _ZN8TVectorTIfED2Ev, _ZN8TStorage14UpdateIsOnHeapERVKjRVj, _ZGVL5myvec, _ZN8TVectorTIfEC1Ev, _ZTI8TVectorTIfE, _ZTV8TVectorTIfE, __clang_call_terminate, _ZNK8TVectorTIfE11ShowMembersER16TMemberInspector, $.cling-module-306.__inits.0, _ZNK7TObject10IsSortableEv, _ZN8TVectorTIfEC2Ev, _ZNSt13__atomic_baseIhEppEv, _ZNK8TVectorTIfE3IsAEv, __orc_init_func.cling-module-306, _ZN8TVectorTIfED0Ev, _ZZNK8TVectorTIfE27CheckTObjectHashConsistencyEvE14recurseBlocker, _ZN7TObjectC2Ev, _ZN8TVectorTIfED1Ev, _ZStanSt12memory_orderSt23__memory_order_modifier, _ZNK8TVectorTIfE27CheckTObjectHashConsistencyEv, _ZNKSt13__atomic_baseIhEcvhEv, _ZTS8TVectorTIfE, _ZN8TVectorTIfE5ClearEPKc, _ZNK7TObject9GetOptionEv }) }
cling JIT session error: Failed to materialize symbols: { (main, { _ZGVL5myvec }) }
[runStaticInitializersOnce]: Failed to materialize symbols: { (main, { __cxx_global_var_initcling_module_307_, __orc_init_func.cling-module-307, _ZN12__cling_N51516__cling_Un1Qu314EPv, $.cling-module-307.__inits.0 }) }
[runStaticInitializersOnce]: Failed to materialize symbols: { (main, { __orc_init_func.cling-module-306 }) }
Traceback (most recent call last):
  File "/afs/cern.ch/user/v/vpadulan/repro_libphysics.py", line 12, in <module>
    raise SystemExit(main())
                     ^^^^^^
  File "/afs/cern.ch/user/v/vpadulan/repro_libphysics.py", line 9, in main
    print(ROOT.myvec)
          ^^^^^^^^^^
  File "/cvmfs/sft.cern.ch/lcg/views/LCG_106/x86_64-el9-gcc13-opt/lib/ROOT/_facade.py", line 164, in _fallback_getattr
    raise AttributeError("Failed to get attribute {} from ROOT".format(name))
AttributeError: Failed to get attribute myvec from ROOT

ROOT 6.30.02 (LCG105)

[vpadulan@lxplus959 ~]$source /cvmfs/sft.cern.ch/lcg/views/LCG_105/x86_64-el9-gcc13-opt/setup.sh
[vpadulan@lxplus959 ~]$root --version
ROOT Version: 6.30/02
Built for linuxx8664gcc on Dec 20 2023, 18:59:44
From heads/master@tags/v6-30-02
[vpadulan@lxplus959 ~]$python repro_libphysics.py
Name: TVectorT<float> Title:

Reproducer

import ROOT

def main():
    ROOT.gInterpreter.Declare('''
        #include <TVectorT.h>
        //R__LOAD_LIBRARY(libMatrix);  // Uncomment to make the error disappear
        const auto myvec = TVectorT<float>();
    ''')
    print(ROOT.myvec)

if __name__ == "__main__":
    raise SystemExit(main())

ROOT version

6.32.*

Installation method

Any

Operating system

Any

Additional context

No response

[tommasodiotalevi]

Following the issue

[vepadulano]

Small update to give further context, the following seemingly similar but subtly different snippet works also for ROOT 6.32

import ROOT

def main():
    ROOT.gInterpreter.ProcessLine("const auto myvec = TVectorT<float>();")
    print(ROOT.myvec)

if __name__ == "__main__":
    raise SystemExit(main())

And it is clear that in this case ProcessLine tries much harder than Declare to automatically load libraries that might be necessary to evaluate the line.

Also, the reproducer from the issue description fails with the same error in ROOT latest master.