[Qemu-devel] Qemu build failure with uninitialized variables when "-Wmaybe-uninitialized" is open

[Wei, Danmei]

Hi,

When we build qemu with "-Wmaybe-uninitialized" on, and got the following error 
information.
  CC      qobject/json-streamer.o
  CC      qobject/json-parser.o
  CC      qobject/block-qdict.o
qobject/block-qdict.c: In function 'qdict_array_split':
qobject/block-qdict.c:259:25: error: 'subqdict' may be used uninitialized in 
this function [-Werror=maybe-uninitialized]
         qlist_append_obj(*dst, subqobj ?: QOBJECT(subqdict));
                         ^
cc1: all warnings being treated as errors
make: *** [qobject/block-qdict.o] Error 1

It is because of the uninitialized variable subqdict function qdict_array_split.
Thanks to confirm it.

Below is the ENV Setting:
OS: RHEL OS 7.6
Qemu Version: commit c102d9471f8f02d9fbea72ec4505d7089173f470
CFLAGS Setting in env: export CFLAGS="-g -O3 -Wmaybe-uninitialized"

Thanks,
               Danmei