Review Request 125138: do not crash when context gets defunct & implement respawn

[Harald Sitter]

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https://git.reviewboard.kde.org/r/125138/
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Review request for Plasma.


Repository: plasma-pa


Description
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context getting lost means we must destory all our references to pulse
objects. however we only nuked them from the map which incidentially didn't
remove them from the models so plasma/kcm would crash when trying to
refresh.

also implement respawn when the context dies, since no data isn't
particularly useful either

BUG: 351505


Diffs
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  src/context.h a8bf4673544b7de2802f360be4e88edccdc7d83c 
  src/context.cpp c09706a984eff4d34fea29869d96ce0cb68390af 
  src/maps.h 5c29c822da0cab45dbb5efb992d2d554374c6a1d 

Diff: https://git.reviewboard.kde.org/r/125138/diff/


Testing
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builds and doesnt crash no more


Thanks,

Harald Sitter

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