[Bug libstdc++/38720] _Relative_pointer_impl invokes undefined behavior

[rguenth at gcc dot gnu dot org]

------- Comment #5 from rguenth at gcc dot gnu dot org  2009-01-04 19:51 -------
Subject: Bug 38720

Author: rguenth
Date: Sun Jan  4 19:51:18 2009
New Revision: 143058

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=143058
Log:
2009-01-04  Richard Guenther  <rguenther@suse.de>

        PR libstdc++/38720
        * include/ext/pointer.h (_Relative_pointer_impl): Use an unsigned
        integer type for storage, arithmetic and comparisons.
        * testsuite/ext/ext_pointer/1_neg.cc: Adjust line numbers.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/include/ext/pointer.h
    trunk/libstdc++-v3/testsuite/ext/ext_pointer/1_neg.cc


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38720