UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36

Steps to reproduce the problem:
1. open https://jsfiddle.net/y7wjLo1h/1/
2. run the fiddle in chrome with the dev tools console open
3. you will get no warning
4. now open react-dom.js in the sources tab and put a breakpoint on line 7020
5. rerun the fiddle, and continue when you hit the breakpoint
6. Chrome will give a warning in the console: react-dom.js:7020 The specified value "" does not conform to the required format.  The format is "#rrggbb" where rr, gg, bb are two-digit hexadecimal numbers.

What is the expected behavior?
The warning should show regardless of whether the breakpoint is set.

What went wrong?
The warning does not show if the breakpoint is not set.

This particular warning is about setting an <input type="color" />'s value to "" which doesn't match the #rrggbb format.  I don't know if the warning showing vs not showing is tied to it being this particular color picker warning.

There are presumably other things making the warning show or not show, but setting a breakpoint vs not was the easiest to reproduce. In the code I was working on that surfaced this bug, the warning was showing and the breakpoint was not set, although presumably something else was different.

Did this work before? N/A 

Chrome version: 54.0.2840.98  Channel: n/a
OS Version: OS X 10.12.1
Flash Version: Shockwave Flash 24.0 r0