strings no longer writable?

[Mike Lijewski]

My understanding is that strings are no longer writable.  That is to say,
the assignment to s[5] in the below program shouldn't be allowed.

main() { char *s = "testing"; s[5] = 'z'; }

Is a conforming implementation required to issue a warning, an error, or
what?

-- 
Mike Lijewski  (H)607/272-0238 (W)607/254-8686
Cornell National Supercomputer Facility
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