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From: Tom Tromey <tromey@redhat.com>
Newsgroups: gmane.linux.lib.musl.general,gmane.comp.lib.gnulib.bugs
Subject: Re: musl, printf out-of-memory test
Date: Thu, 21 Jun 2012 13:58:30 -0600
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>>>>> "Jim" == Jim Meyering <jim@meyering.net> writes:

Jim> That is correct.  It is a feature of gdb-7.0 and newer.
Jim> You can inspect (watch/break-at/etc.) the same address and expect it
Jim> to refer to the same memory location in multiple invocations.
Jim> This makes gdb's command-line history even more useful.

gdb defaults to this for development convenience.
You can change it though, see "set disable-randomization".

Tom