[Bug cli/14977] printf dies with null string

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=14977

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom Tromey <tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=3ae9ce5dd7d1119ca2c94c63a07b04921048ebe3

commit 3ae9ce5dd7d1119ca2c94c63a07b04921048ebe3
Author: Tom Tromey <tom@tromey.com>
Date:   Wed Feb 14 20:11:16 2018 -0700

    Special case NULL when using printf's %s format

    This changes the printf command's %s and %ls formats to special-case
    NULL, and print "(null)" for these.  This is PR cli/14977.  This
    behavior seems a bit friendlier; I was undecided on whether other
    invalid pointers should be handled specially somehow, so for the time
    being I've left those out.

    gdb/ChangeLog
    2018-03-14  Tom Tromey  <tom@tromey.com>

        PR cli/14977:
        * printcmd.c (printf_c_string, printf_wide_c_string): Special case
        for NULL.

    gdb/gdbserver/ChangeLog
    2018-03-14  Tom Tromey  <tom@tromey.com>

        PR cli/14977:
        * ax.c (ax_printf): Special case for NULL.

    gdb/testsuite/ChangeLog
    2018-03-14  Tom Tromey  <tom@tromey.com>

        PR cli/14977:
        * gdb.base/printcmds.exp (test_printf): Add printf test of %s with
        a null pointer.
        * gdb.base/wchar.exp: Likewise.

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