This is a story about how I debug things. We're big users of NGINX and Lua at Shopify. Lately, we've been looking at implementing support to add and remove upstream peers to lua-upstream-nginx-module. Step 1 is to get the tests working for the module to make sure the world's in a sane state. I built a development build of NGINX and ran the tests, and this is when the trouble started.
A few of the tests were failing with similar errors:
# Failed test 'TEST 4: sample in README - response_body - response is expected (req 0)' # at /usr/local/share/perl/5.18.2/Test/Nginx/Socket.pm line 1277. # @@ -1,5 +1,5 @@ # upstream foo.com: