Program terminated with signal 5, Trace/breakpoint trap

[Mathew Yeates]

Hi
With gdb-7.2.50.20100713 I get this error while loading a corefile.

uname
 x86_64 x86_64 x86_64 GNU/Linux

gcc -v
gcc-4.2.4

the first potential error I see, prior to "Program terminated with
signal 5, Trace/breakpoint trap" is
"warning: Can't read pathname for load map: Input/output error."

Help?

-Mathew