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block-qdict: Fix -Werror=maybe-uninitialized build failure

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Building QEMU on Fedora 37 (Rawhide Prerelease) ppc64le failed with the
following error:

    $ ../configure --prefix=/usr/local/qemu-disabletcg --target-list=ppc-softmmu,ppc64-softmmu --disable-tcg --disable-linux-user
    ...
    $ make -j$(nproc)
    ...
    In file included from /root/qemu/include/qapi/qmp/qdict.h:16,
                     from /root/qemu/include/block/qdict.h:13,
                     from ../qobject/block-qdict.c:11:
    /root/qemu/include/qapi/qmp/qobject.h: In function ‘qdict_array_split’:
    /root/qemu/include/qapi/qmp/qobject.h:49:17: error: ‘subqdict’ may be used uninitialized [-Werror=maybe-uninitialized]
       49 |     typeof(obj) _obj = (obj);                                   \
          |                 ^~~~
    ../qobject/block-qdict.c:227:16: note: ‘subqdict’ declared here
      227 |         QDict *subqdict;
          |                ^~~~~~~~
    cc1: all warnings being treated as errors

Fix build failure by expanding the ternary operation.
Tested with `make check-unit` (the check-block-qdict test passed).

Signed-off-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Cc: Kevin Wolf <kwolf@redhat.com>
Cc: Hanna Reitz <hreitz@redhat.com>
Cc: Markus Armbruster <armbru@redhat.com>
Message-Id: <20220311221634.58288-1-muriloo@linux.ibm.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
This commit is contained in:
Murilo Opsfelder Araujo 2022-03-11 19:16:34 -03:00 committed by Markus Armbruster
parent 2058fdbe81
commit 79854b9544
1 changed files with 2 additions and 2 deletions
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4
qobject/block-qdict.c
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@ -251,12 +251,12 @@ void qdict_array_split(QDict *src, QList **dst)
if (is_subqdict) {
qdict_extract_subqdict(src, &subqdict, prefix);
assert(qdict_size(subqdict) > 0);
qlist_append_obj(*dst, QOBJECT(subqdict));
} else {
qobject_ref(subqobj);
qdict_del(src, indexstr);
qlist_append_obj(*dst, subqobj);
}
qlist_append_obj(*dst, subqobj ?: QOBJECT(subqdict));
}
}