Playing around with the contextual search on trunk, I'm getting crashes due to this error occasionally.

java.lang.RuntimeException: Tap time not set!
   at org.chromium.chrome.browser.contextualsearch.ContextualSearchSelectionController.processSearchAction(ContextualSearchSelectionController.java:443)
   at org.chromium.chrome.browser.contextualsearch.ContextualSearchSelectionController$3.onContextReady(ContextualSearchSelectionController.java:457)
   at org.chromium.chrome.browser.contextualsearch.action.SearchAction.onContextReady(SearchAction.java:130)
   at org.chromium.chrome.browser.contextualsearch.action.SearchAction.notifyContextReady(SearchAction.java:95)
   at org.chromium.chrome.browser.contextualsearch.action.ResolvedSearchAction.onSurroundingTextReady(ResolvedSearchAction.java:50)

I'm not 100% sure on how to trigger it manually, it generally occurs if you tap enough times, I've attached videos of it.