Searching for an invalid RegExp shows UNDEFINED

[matthias-brun]

When searching for a string such as '(', which is an invalid regular expression the message 'Showing undefined results' is displayed.

I think there should be some error checking in order to display the 'Showing 0 results' message when an invalid regex is entered.

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[Joshua-Anderson]

I think that could be confusing because that would lead me to think that my regexp was valid but not finding anything. Maybe use a better error message like Invalid Regexp instead of Undefined?

An option to choose whether or not you want to search using a regexp would also be nice, because in this case it doesn't look like you intended ) to be treated as a regexp.

[matthias-brun]

Good point actually. I didn't realize that searching with regexes was a thing until I got that error message. An option to choose whether or not to use a regex for searching would probably be the best solution indeed.
Edit: Or at least inform the user that his input is interpreted as a regex.

[alexbrazier]

I think this has been resolved in #3850

[ggazzo]

@RocketChat/core the problem still persists on history/private but the link doesn't exist anymore.
What should I do? Fix the problem? delete the route?

[sampaiodiego]

I think we don't need this page anymore.. that's why the link were removed.

[MartinSchoeler]

@sampaiodiego so should this issue be closed?

[sampaiodiego]

@MartinSchoeler no.. we have to decide to whether remove the page or fix it.