Re: GC bug?

[Richard M. Stallman]

    Run till exit from #0  Ffuncall (nargs=2, args=0xbfe57660) at eval.c:2870
    Fbyte_code (bytestr=144421571, vector=144365692, maxdepth=9) at 
bytecode.c:692
    692                 break;
    Value returned is $2 = 137379905
    (gdb) finish
    Run till exit from #0  Fbyte_code (bytestr=144421571, vector=144365692,
        maxdepth=9) at bytecode.c:692

    At this point Emacs started consuming all available CPU cycles and I
    had to interrupt gdb.  So I don't know what else to do; can you or
    someone else advise?

This means you have found the frame that is looping.
Now please find out what function that is.

See the information in etc/DEBUG.