D6162: generate the old key before updating enabledborders

[Marco Martin]

mart created this revision.
Restricted Application added projects: Plasma, Frameworks.
Restricted Application added subscribers: Frameworks, plasma-devel.

REVISION SUMMARY
  sometimes a frame changed enabled borders causing a dangling
  pointer in s_sharedFrames, since oldkey was generated
  with the new enabled borders, it generated a key not present
  in the hash, tryed to remove it and left the one associated
  with the old key in the hash.
  if the need to reuse a frame with that key ever arised again,
  we had a crash
  BUG:378508

TEST PLAN
  couldn't reproduce the crash neither with or without patch,
  with the patch, if i put debug in every place a framedata is removed,
  searching if the key is in the hash before removing it, now
  it's always true, before sometimes it was false

REPOSITORY
  R242 Plasma Framework (Library)

BRANCH
  master

REVISION DETAIL
  https://phabricator.kde.org/D6162

AFFECTED FILES
  src/plasma/framesvg.cpp

To: mart, #plasma
Cc: plasma-devel, #frameworks, ZrenBot, spstarr, progwolff, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart, lukas
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