I get
0x7fffffffebea
It's not clear from your question, but you likely get that value when running program outside of GDB. That value should change from run to run (due to address space layout randomization), and you should get a different value inside GDB (due to differences in stack layout when running under GDB).
In other words, run the program under GDB, print addr, then use x/s addr
to examine the string.