seg fault in compact_small_strings()

[Stephen Eglen]

I'm using a recent version of CVS emacs (Oct 26) and notice it has
been seg faulting maybe once/day; I've now started running under gdb
to at least catch the seg fault and provide backtrace.  Today I just
did "M-x vm" and got the following.  I have the gdb session still open
so if there is anything more informative I can provide, let me know.

Stephen

Program received signal SIGSEGV, Segmentation fault.
compact_small_strings () at alloc.c:1870
1870                nbytes = GC_STRING_BYTES (from->string);
(gdb) p from->string
$1 = (struct Lisp_String *) 0x2f786574

(gdb) backtrace
#0  compact_small_strings () at alloc.c:1870
#1  0x081340cf in gc_sweep () at alloc.c:5224
#2  0x0813337f in Fgarbage_collect () at alloc.c:4551
#3  0x0816f63c in Fbyte_code (bytestr=137713008, vector=131,
    maxdepth=-1073755616) at bytecode.c:756
#4  0x08147d16 in funcall_lambda (fun=136157220, nargs=3,
    arg_vector=0xbfffcb4c) at eval.c:2923
#5  0x0814791f in Ffuncall (nargs=4, args=0xbfffcb48) at eval.c:2793
#6  0x0816ec3c in Fbyte_code (bytestr=137491649, vector=3,
    maxdepth=-1073755320) at bytecode.c:686
#7  0x08147d16 in funcall_lambda (fun=136157220, nargs=3,
    arg_vector=0xbfffcc6c) at eval.c:2923
#8  0x0814791f in Ffuncall (nargs=4, args=0xbfffcc68) at eval.c:2793
#9  0x0816ec3c in Fbyte_code (bytestr=137491649, vector=3,
    maxdepth=-1073755032) at bytecode.c:686
#10 0x08147d16 in funcall_lambda (fun=136157220, nargs=3,
    arg_vector=0xbfffcd8c) at eval.c:2923
#11 0x0814791f in Ffuncall (nargs=4, args=0xbfffcd88) at eval.c:2793
#12 0x0816ec3c in Fbyte_code (bytestr=137491649, vector=3,
    maxdepth=-1073754744) at bytecode.c:686
#13 0x08147d16 in funcall_lambda (fun=136157220, nargs=3,
    arg_vector=0xbfffceac) at eval.c:2923
#14 0x0814791f in Ffuncall (nargs=4, args=0xbfffcea8) at eval.c:2793




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