root [0]
Processing CompareTwoRuns.C()...
 Generating stack trace...
 0x00007fbe0086920d in cling::Interpreter::EvaluateInternal(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cling::CompilationOptions, cling::Value*, cling::Transaction**, unsigned long) + 0x16d from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe008694b0 in cling::Interpreter::echo(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, cling::Value*) + 0x40 from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe008f9e12 in cling::MetaSema::actOnxCommand(llvm::StringRef, llvm::StringRef, cling::Value*) + 0x272 from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe00905249 in cling::MetaParser::isXCommand(cling::MetaSema::ActionResult&, cling::Value*) + 0x129 from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe0090684e in cling::MetaParser::isCommand(cling::MetaSema::ActionResult&, cling::Value*) + 0x7e from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe008f4219 in cling::MetaProcessor::process(char const*, cling::Interpreter::CompilationResult&, cling::Value*, bool) + 0x1e9 from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe007f7841 in <unknown> from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe008075f3 in <unknown> from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe007f6e4b in <unknown> from /home/vasilisa/fair/fairsoft/install/lib/root/libCling.so
 0x00007fbe0534c5ec in TApplication::ExecuteFile(char const*, int*, bool) + 0x7ac from /home/vasilisa/fair/fairsoft/install/lib/root/libCore.so.6.10
 0x00007fbe0534bb26 in TApplication::ProcessLine(char const*, bool, int*) + 0x926 from /home/vasilisa/fair/fairsoft/install/lib/root/libCore.so.6.10
 0x00007fbe05786715 in TRint::ProcessLineNr(char const*, char const*, int*) + 0x155 from /home/vasilisa/fair/fairsoft/install/lib/root/libRint.so.6.10
 0x00007fbe05787d28 in TRint::Run(bool) + 0x218 from /home/vasilisa/fair/fairsoft/install/lib/root/libRint.so.6.10
 0x0000000000400afc in <unknown> from /home/vasilisa/fair/fairsoft/install/bin/root.exe
 0x00007fbe043a0445 in __libc_start_main + 0xf5 from /usr/lib64/libc.so.6
 0x0000000000400b6a in <unknown> from /home/vasilisa/fair/fairsoft/install/bin/root.exe
Error in <HandleInterpreterException>: Trying to access a pointer that points to an invalid memory address..
Execution of your code was aborted.
In file included from input_line_8:1:
/home/vasilisa/Work/silicon/CompareTwoRuns.C:23:3: warning: invalid memory pointer passed to a callee:
  h->SetLineColor(2);