** Also affects: mir (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1577967

Title:
  During surface creation, first stream in spec becomes default stream.

Status in Mir:
  Fix Committed
Status in mir package in Ubuntu:
  New

Bug description:
  A surface creation spec can have multiple streams. The code currently,
  by happenstance, makes the first stream the "default stream", i.e.
  instantiates a MirSurface using that stream. The MirSurface object's
  methods then use that stream for various purposes, e.g. to set the
  swap interval, to set size during resize, to query parameters of the
  surface, etc. Here's a list of MirSurface methods that use the default
  stream :

  MirSurface::get_parameters(),
  MirSurface::configure(),
  MirSurface::attrib(),
  MirSurface::handle_event()

  We need to define the precise semantics of MirSurface properly in
  regards to the streams that may be associated with it.

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