Unresponsive eclipse neon when accessing search view from instasearch

[shayanlinux]

Search using InstaSearch in Eclipse Neon makes Eclipse unresponsive. I have cleared and rebuilt index, reinstalled plugin, also filtered out unrelated folders from index, but still it does not respond when I try to search.

In the Eclipse log I see the following error:
!MESSAGE Exception occurred while rendering: org.eclipse.e4.ui.model.application.ui.menu.impl.ToolBarImpl@79c1ccf7 (elementId: it.unibz.instasearch.ui.InstaSearchView, tags: [], contributorURI: null) (widget: null, renderer: null, toBeRendered: true, onTop: false, visible: true, containerData: null, accessibilityPhrase: null)
Please let me know if you need more information.

Any idea what could cause this?
Thanks in advance.

[agrabovskis]

I had the same issue. As soon as the search view had to be displayed, the Eclipse hanged. Try resetting the perspective and then to access the view. For me it happened to a workspace with huge number of projects, but kept appearing even after I removed all products, hence it is not related to indexing operation. And stack trace didn't reveal anything (see attached files). I suspect that there are some kind of UI object leftovers that Eclipse keeps GC'ing, but instasearch keeps creating. This happened on Oxygen.

stacktrace1.txt
stacktrace2.txt
stacktrace3.txt