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[shuerhaaken <1157209@xxxxxxxxxxxxxxxxxx>]

** Also affects: unico
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1157209

Title:
  Memory leak in drawing

Status in Light Themes:
  New
Status in The Unico Gtk+ Theming Engine:
  New

Bug description:
  If I use the Ambience theme, my application leaks memory. 
  This happens is a custom Widget derrived from a GtkProgressBar is used, which defines it's own height.

  If I use the test program with Adwaita theme there is no such issue.

  Derrived widget in Vala code:
  -----
  using Gtk;

  private class CustomProgress : ProgressBar { 
      public override void get_preferred_height(out int minimum_height, out int natural_height) {
          minimum_height = natural_height = 8;
      }
  }
  -----

  The leaking happens during rendering after the progress bar's fraction
  has been set. Issue come up in gtk_render_background(),
  gtk_render_frame() and gtk_render_activity().

  Attached test case

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