Merge remote-tracking branch 'remotes/armbru/tags/pull-error-2020-04-04' into staging

Error reporting patches for 2020-04-04

# gpg: Signature made Sat 04 Apr 2020 13:19:40 BST
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "[email protected]"
# gpg: Good signature from "Markus Armbruster <[email protected]>" [full]
# gpg:                 aka "Markus Armbruster <[email protected]>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-error-2020-04-04:
  qga/commands-posix: fix use after free of local_err
  dump/win_dump: fix use after free of err
  scripts/coccinelle: add error-use-after-free.cocci

Signed-off-by: Peter Maydell <[email protected]>