[R] tracing a warning message?

RenE J.V. Bertin rjvbertin at hotmail.com
Tue Oct 22 18:05:14 CEST 2002

Is there an equivalent to traceback() for tracing a warning message? Since upgrading to 1.6.0, I get a message, at startup, that "the use of _ is deprecated". I've never used this operator in any of the functions I wrote, so some library must use it.
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