Hi, first here is my exact configuration: - OS: Red Hat Enterprise Linux WS release 3 (Taroon Update 2) - ROOT: Intel x86 Linux for Redhat RHEL 3 (SLC3) and gcc 3.2.3, version 4.00/08 (ftp://root.cern.ch/root/root_v4.00.08.Linux.RH7.3-slc3.gcc3.2.3.tar.gz) - gcc: gcc version 3.2.3 20030502 (Red Hat Linux 3.2.3-34) and I have the following small program: #setName.C #include "TTree.h" int main() { TTree *tree1 = new TTree(); tree1->SetName("tree1"); TTree *tree2 = tree1->CloneTree(0); tree2->SetName("tree2"); } I compile it with gcc -ggdb `root-config --cflags --libs` setName.C and run a.out. I get the following seg fault: *** Break *** segmentation violation Generating stack trace... 0xb6405768 in __libc_start_main + 0xf8 from /lib/tls/libc.so.6 0x08048fad in dl_iterate_phdr + 0x31 from a.out Using gdb gives: [Thread debugging using libthread_db enabled] [New Thread -1240223072 (LWP 26487)] Program received signal SIGSEGV, Segmentation fault. [Switching to Thread -1240223072 (LWP 26487)] 0x080490fe in main () at setName.C:8 8 tree2->SetName("tree2"); (gdb) Somehow SetName() of the cloned tree produces the seg fault. Any advice/workaround for that? Thanks a lot, Frank
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