Description of problem:
With an ODS file loaded, I clicked + to add a new sheet, then right clicked the sheet and clicked "Add Sheet..." and chose a file to import as the new sheet.  It's a tab delimited .txt file from an Amazon product dump.  Selecting that .txt file and clicking OK to import it immediately crashed the program.

I went through the steps twice and it crashed both times.

Version-Release number of selected component:
libreoffice-core-3.6.6.2-5.fc18

Additional info:
backtrace_rating: 4
cmdline:        /usr/lib64/libreoffice/program/soffice.bin --calc --splash-pipe=6
crash_function: getByName
executable:     /usr/lib64/libreoffice/program/soffice.bin
kernel:         3.9.2-200.fc18.x86_64
uid:            1000
ureports_counter: 2
xsession_errors: 

Truncated backtrace:
Thread no. 1 (10 frames)
 #6 getByName at /usr/src/debug/libreoffice-3.6.6.2/basic/source/uno/namecont.cxx:125
 #7 basic::NameContainer::getByName at /usr/src/debug/libreoffice-3.6.6.2/basic/source/uno/namecont.cxx:119
 #8 basic::SfxLibrary::getByName at /usr/src/debug/libreoffice-3.6.6.2/basic/source/uno/namecont.cxx:3015
 #9 ScDocument::TransferTab at /usr/src/debug/libreoffice-3.6.6.2/sc/source/core/data/documen2.cxx:1036
 #10 ScDocShell::TransferTab at /usr/src/debug/libreoffice-3.6.6.2/sc/source/ui/docshell/docsh5.cxx:861
 #11 ScViewFunc::ImportTables at /usr/src/debug/libreoffice-3.6.6.2/sc/source/ui/view/viewfun2.cxx:2369
 #12 ScTabViewShell::ExecuteTable at /usr/src/debug/libreoffice-3.6.6.2/sc/source/ui/view/tabvwshf.cxx:262
 #13 CallExec at /usr/src/debug/libreoffice-3.6.6.2/sfx2/inc/sfx2/shell.hxx:199
 #14 SfxDispatcher::Call_Impl at /usr/src/debug/libreoffice-3.6.6.2/sfx2/source/control/dispatch.cxx:270
 #15 SfxBindings::Execute_Impl at /usr/src/debug/libreoffice-3.6.6.2/sfx2/source/control/bindings.cxx:1287