Chrome Version: 64.0.3282.167 (Official Build) (64-bit)
OS: Linux

What steps will reproduce the problem?
(1) Save the following code to an HTML file:

    <script>
    function foo(...list) {
      debugger;
    }
    foo(1,2,3);
    </script>

(2) Open devtools.
(3) Navigate to the HTML file.
(4) In the source view in devtools, hover over `...list`.

What is the expected result?
A popup with the value of `list` should appear.

What happens instead?
A popup with a `SyntaxError` appears. (Screenshot attached.)


I believe that this is probably caused by devtools incorrectly assuming that the ellipsis is part of the argument name, causing devtools to attempt to evaluate "...list" as an expression.
 

Deleted: devtools-ellipsis-argument-highlight.png 56.1 KB

	devtools-ellipsis-argument-highlight.png 56.1 KB View Download