Chrome Version       : 60.0.3112.113
URLs (if applicable) : https://chromium-review.googlesource.com/changes/?o=DETAILED_LABELS&q=is%3Amerged%20limit%3A20
Other browsers tested: N/A

What steps will reproduce the problem?
(1) Login to chromium-review
(2) Open the REST API URL above

What is the expected result?
JSON is downloaded

What happens instead?
"Internal server error"

Please provide any additional information below. Attach a screenshot if
possible.