Daniel Eggert <danieleggert@mac.com> writes:
> ld also sometimes gets a signal 11. Signal 4 is SIGILL: 'illegal
> instruction' and signal 11 is SIGSEGV: 'segmentation violation'.

: Signal 11s are a symptom of hardware memory failures.

: Perry

I think NMI is likely to result from hardware memory failure.

But segment violations can result from software errors, and I don't think this
would be unusual.  I remember Arena web browser, included with Linux 
(Slackware) some years back, always produced segmentation violation and exited
whenever I tried to browse a certain CD that was arranged for viewing with a
web browser (HTML and links).  Popclient OS/2 port always produced segmentation
violation when downloading an email message with one or more lines having 1024
characters, though that message and all before it were successfully downloaded,
and all messages up to but not including the offending message were deleted from
the server.