UserAgent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36

Steps to reproduce the problem:
1. Run the attached test case

What is the expected behavior?
No errors (this was not throwing any errors until Chrome was updated to v66 today).

What went wrong?
Got this error:

Uncaught SyntaxError: Undefined label 'OUTER'

Did this work before? N/A 

Chrome version: 66.0.3359.117  Channel: stable
OS Version: 10.0
Flash Version: 

When you remove the var statement then it works fine again. It appears after upgrading to v66 Chrome now expects the line immediately below the outer label to be a for/while/do whereas v65 and below was more lenient and allowed other lines between the label and the loop.
 

Deleted: testcase.html 553 bytes

testcase.html 553 bytes View Download