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From: Daniel Holbert <dholbert@cs.stanford.edu>
Bug 612662 patch 3: Drop cairo_quartz_surface_t's "imageSurfaceEquiv" member if we fail to create it. r=roc a=blocking-final+

diff --git a/gfx/cairo/cairo/src/cairo-quartz-surface.c b/gfx/cairo/cairo/src/cairo-quartz-surface.c
--- a/gfx/cairo/cairo/src/cairo-quartz-surface.c
+++ b/gfx/cairo/cairo/src/cairo-quartz-surface.c
@@ -3152,17 +3152,28 @@ cairo_quartz_surface_create (cairo_forma
     if (surf->base.status) {
 	CGContextRelease (cgc);
 	free (imageData);
 	// create_internal will have set an error
 	return (cairo_surface_t*) surf;
     }
 
     surf->imageData = imageData;
-    surf->imageSurfaceEquiv = cairo_image_surface_create_for_data (imageData, format, width, height, stride);
+
+    cairo_surface_t* tmpImageSurfaceEquiv =
+      cairo_image_surface_create_for_data (imageData, format,
+                                           width, height, stride);
+
+    if (cairo_surface_status (tmpImageSurfaceEquiv)) {
+        // Tried & failed to create an imageSurfaceEquiv!
+        cairo_surface_destroy (tmpImageSurfaceEquiv);
+        surf->imageSurfaceEquiv = NULL;
+    } else {
+        surf->imageSurfaceEquiv = tmpImageSurfaceEquiv;
+    }
 
     return (cairo_surface_t *) surf;
 }
 
 /**
  * cairo_quartz_surface_get_cg_context
  * @surface: the Cairo Quartz surface
  *