xwiki/xwiki-commons — comment on commit 724f2011a49c2fc49daed4846adb1e7c76eff5b2
File: xwiki-commons-core/xwiki-commons-component/xwiki-commons-component-default/src/main/java/org/xwiki/component/embed/EmbeddableComponentManager.java line 163
By tmortagne:

It does not prevent anything, even with the synchronized you could have one of the component you just got unregistered just after the call to lookupList.