Segmentation violation with ROOT 5.28.00c

From: Joern Wuestenfeld <j.wuestenfeld_at_gsi.de>
Date: Fri, 29 Apr 2011 13:34:33 +0200

Hello Root experts,

I have a problem with a code, that was working with root-v5.22g. After upgrading to 5.28.00c I get the following Segmentation violation in about 50% of the cases. The TList object in question contains TString objects created with new. The List contains exactly 1 element. I checked with valgrind and it gives "Invalid read of size 4" at this point.

Any idea what could be wrong?

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There was a crash (kSigSegmentationViolation). This is the entire stack trace of all threads:

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#0 0xffffe424 in __kernel_vsyscall ()
#1 0xb131b733 in waitpid () from /lib/libc.so.6
#2 0xb12b9403 in ?? () from /lib/libc.so.6
#3 0xb151d14b in system () from /lib/libpthread.so.0
#4 0xb5dd3ef9 in TUnixSystem::Exec (this=0x80d4e20,

    shellcmd=0x84b3368
"/opt/HSC/install/root-v5.28.00c/etc/gdb-backtrace.sh 3570 1>&2") at /opt/HSC/build/root-v5.28.00c/core/unix/src/TUnixSystem.cxx:2031
#5 0xb5dd47b4 in TUnixSystem::StackTrace (this=0x80d4e20)

    at /opt/HSC/build/root-v5.28.00c/core/unix/src/TUnixSystem.cxx:2253

#6 0xb5dd2279 in TUnixSystem::DispatchSignals (this=0x80d4e20,

    sig=kSigSegmentationViolation)

    at /opt/HSC/build/root-v5.28.00c/core/unix/src/TUnixSystem.cxx:1157

#7 0xb5dd0471 in SigHandler (sig=kSigSegmentationViolation)

    at /opt/HSC/build/root-v5.28.00c/core/unix/src/TUnixSystem.cxx:357

#8 0xb5dd7ae5 in sighandler (sig=11)

    at /opt/HSC/build/root-v5.28.00c/core/unix/src/TUnixSystem.cxx:3522

#9 <signal handler called>

#10 0xb5da5bce in TClass::GetDirectoryAutoAdd (this=0x10004)

    at /opt/HSC/build/root-v5.28.00c/core/meta/src/TClass.cxx:5406

#11 0xb5d726ab in TList::Delete (this=0x848fbd0, option=0xb61a4da8 "")

    at /opt/HSC/build/root-v5.28.00c/core/cont/src/TList.cxx:414

#12 0xb5d72312 in TList::Clear (this=0x848fbd0, option=0xb61a4da8 "")

    at /opt/HSC/build/root-v5.28.00c/core/cont/src/TList.cxx:350
#13 0xb5d717e7 in TList::~TList (this=0x848fbd0,

    __in_chrg=<value optimized out>)
    at /opt/HSC/build/root-v5.28.00c/core/cont/src/TList.cxx:83
#14 0x080520ab in setupFiles (ev=0x805bc08) at setup.cc:391
#15 0x08055903 in main (argc=3, argv=0xbfd9cbe4) at analyse.cc:92

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Regards, Jörn Received on Fri Apr 29 2011 - 13:34:48 CEST