Where has the Google Chrome Console Filter [_] Regex checkbox gone?

Question

All of the Google Chrome Console documentation pages (and numerous SO answers) show a checkbox labeled "Regex" next to the filter when the filter bar is expanded, e.g., from the Command Line API Reference:

I use it so much that I have macros set up to paste various Regexes into it, so I'm positive I am not crazy and that it existed until very recently. I am using Google Chrome Version 57.0.2987.21 beta (64-bit) on Mac OS X, and it's no longer there:

Is it gone, have I done something inadvertent to hide it, or what?

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Update: This might be a bug in the Beta channel: DevTools: [regression] isRegex checkbox is missing on Network and Console filter bars

Answer 1

In Chrome 58+ to enter a regex simply enclose the text in /, this trick is used in some applications:

/\w+::\S/