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  1. ROOT
  2. ROOT-8239

"python: free(): invalid next size (fast)" in PyROOT 6.06.02 and patches

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 6.08/00, 6.06/08
    • Component/s: PyROOT
    • Labels:
      None
    • Environment:

      ROOT 6.06.02 in LCG84 and ROOT 6.06 patches in dev4

      Description

      Hi, we get some "python: free(): invalid next size (fast)" in PyROOT 6.06.02 and patches.

      Unfortunately this is there since LCG84, I thought I had tested it but apparently I was wrong. This has also gone unnoticed in the nightlies because the test suite we run in the nightlies is tuned to be fast, so many important tests are disabled. Now I have reenabled a short test that should show this also in the next dev4 nightlies.

      The issue happens in the pycool ifolder tests, it looks like this

      Using QMTEST_CLASS_PATH=/afs/cern.ch/sw/lcg/app/nightlies/dev4/Sat/COOL/3_1-patches/x86_64-slc6-gcc49-dbg/CoolTest/qmtest
       
      Using CORALCOOL_QMTEST_WORKDIR=/tmp/avalassi/Sat/COOL/3_1-patches/tmp.x86_64-slc6-gcc49-dbg
       
      Launch tests - results will be in /tmp/avalassi/Sat/COOL/3_1-patches/logs/qmtestCool/x86_64-slc6-gcc49-dbg.qmr
       
      Launch 'qmtest run pycool.sqlite.ifolder'
       
      *** glibc detected *** python: free(): invalid next size (fast): 0x0000000009fc3ee0 ***
       
      ======= Backtrace: =========
       
      /lib64/libc.so.6[0x3971675f3e]
       
      /lib64/libc.so.6[0x3971678dd0]
       
      /afs/cern.ch/sw/lcg/app/nightlies/dev4/Sat/ROOT/v6-06-00-patches/x86_64-slc6-gcc49-dbg/lib/libPyROOT.so(_ZN5Cppyy10DeallocateElPv+0x1c)[0x7fdb07a35017]
       
      /afs/cern.ch/sw/lcg/app/nightlies/dev4/Sat/ROOT/v6-06-00-patches/x86_64-slc6-gcc49-dbg/lib/libPyROOT.so(_ZN6PyROOT17op_dealloc_nofreeEPNS_11ObjectProxyE+0xb0)[0x7fdb07a28d1c]
       
      /afs/cern.ch/sw/lcg/app/nightlies/dev4/Sat/ROOT/v6-06-00-patches/x86_64-slc6-gcc49-dbg/lib/libPyROOT.so(+0xbe4c0)[0x7fdb07a294c0]
       
      /afs/cern.ch/sw/lcg/releases/Python/2.7.10-806f9/x86_64-slc6-gcc49-dbg/bin/../lib/libpython2.7.so.1.0(+0xb7bc2)[0x7fdb10239bc2]

      Note that this even breaks my test driver (qmtest), it is a rather catastrophic failure.

      I also got a similar signature in oracle tests, where the issue is intercepted by the oracle client signal handler

            test_listChannelsWithNames (__main__.TestIFolder) ... ORA-24550: signal received: [si_signo=6] [si_errno=0] [si_code=-6] [si_int=0] [si_ptr=(nil)] [si_addr=0x38d200005a3b]
       
            kpedbg_dmp_stack()+360<-kpeDbgCrash()+192<-kpeDbgSignalHandler()+119<-skgesig_sigactionHandler()+218<-__sighandler()<-gsignal()+53<-malloc_printerr()+190<-_int_free()+1579<-_ZN5Cppyy10DeallocateElPv()+23<-_ZN6PyROOT17op_dealloc_nofreeEPNS_11ObjectProxyE()+176
      <-_ZN6PyROOT12_GLOBAL__N_110op_deallocEPNS_11ObjectProxyE()+24<-subtype_dealloc()+1122<-00007FC738D2FF80<-00007FC738D53450<-00007FC74C8A5680
      <-0000000009DE98B0<-00007FC738D317C0<-00007FC738D31818<-00000000022BB510<-00007FC738D34660<-00007FC738D40B20<-00007FC738D346A8
      <-00007FC738D2F5D0<-00007FC738D31870<-00007FC738D3EBF0

      Let's see in the nightlies tonight. If confirmed I will send you a reproducer.

      Thanks
      Andrea

        Attachments

        1. root8239.h
          0.2 kB
        2. root8239.py
          0.1 kB

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              Assignee:
              mato Pere Mato Vila
              Reporter:
              valassi Andrea Valassi
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                Updated:
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