New upstream version 2018.7

apidoc/html/ostree-Root-partition-mount-point.html

@@ -1392,7 +1392,8 @@ metadata bit will be set causing libostree to avoid automatic GC of the
 deployment. However, this is really an "advisory" note; it's still possible
 for e.g. older versions of libostree unaware of pinning to GC the deployment.</p>
 <p>This function does nothing and returns successfully if the deployment
-is already in the desired pinning state.</p>
+is already in the desired pinning state.  It is an error to try to pin
+the staged deployment (as it's not in the bootloader entries).</p>
 <div class="refsect3">
 <a name="ostree-sysroot-deployment-set-pinned.parameters"></a><h4>Parameters</h4>
 <div class="informaltable"><table class="informaltable" width="100%" border="0">