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Eduardo Habkost d769f0dfee qom: Don't keep error value between object_property_parse() calls 
When handling errp==NULL at object_apply_global_props(), we are
leaving the old error value in `err` after printing a warning.
This makes QEMU crash if two global properties generate warnings:

  $ echo device_add rtl8139 | qemu-system-x86_64 -monitor stdio -global rtl8139.xxx=yyy -global rtl8139.xxx=zzz
  warning: can't apply global rtl8139.xxx=yyy: Property '.xxx' not found
  qemu-system-x86_64: util/error.c:57: error_setv: Assertion `*errp == NULL' failed.
  Aborted (core dumped)

Fix that by making `err` go out of scope immediately after the
warn_report_err() call.

Fixes: 50545b2cc0 "qdev-props: call object_apply_global_props()"
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20190110020259.8492-2-ehabkost@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
 		2019-01-10 12:25:15 -02:00
..
Makefile.objs qom: allow QOM to be linked into tools binaries 2015-09-15 14:35:39 +01:00
container.c container: don't leak container reference 2017-05-04 15:34:41 +04:00
cpu.c qdev-props: remove errp from GlobalProperty 2019-01-07 16:18:42 +04:00
object.c qom: Don't keep error value between object_property_parse() calls 2019-01-10 12:25:15 -02:00
object_interfaces.c qom: make user_creatable_complete() specific to UserCreatable 2018-12-11 15:45:22 -02:00
qom-qobject.c qapi: Drop unused non-strict qobject input visitor 2017-03-05 09:14:19 +01:00
trace-events docs: fix broken paths to docs/devel/tracing.txt 2017-07-31 13:12:53 +03:00