ERR_EMPTY_RESPONSE on http but not https

[JayXon]

http://.../?ModPagespeed=off always works
http://.../?ModPagespeed=on&ModPagespeedFilters= only works the first time, always ERR_EMPTY_RESPONSE afterwards
https://.../?ModPagespeed=on&ModPagespeedFilters= always works

2016/02/14 05:37:31 [alert] 23676#0: [ngx_pagespeed 1.10.33.4-0] [0214/053731:FATAL:ngx_base_fetch.cc(144)] Check failed: r->count > 0. r->count: 0
nginx: worker process() [0x81551bb]
nginx: worker process() [0x80e7937]
nginx: worker process() [0x8151d9c]
nginx: worker process() [0x80754d0]
nginx: worker process() [0x8074d80]
nginx: worker process() [0x80ed71f]
nginx: worker process() [0x8106d46]
nginx: worker process() [0x80f0d98]
nginx: worker process() [0x8052829]
nginx: worker process() [0x8055288]
/lib/i386-linux-gnu/i686/cmov/libc.so.6(__libc_start_main+0xf3) [0xb7143a63]
nginx: worker process() [0x80558d5]
2016/02/14 05:37:31 [alert] 19979#0: worker process 23676 exited on signal 6

nginx version: nginx/1.8.1
built by gcc 4.9.2 (Debian 4.9.2-10) 
built with OpenSSL 1.0.1k 8 Jan 2015
TLS SNI support enabled
configure arguments: --add-module=/root/ngx_pagespeed-release-1.10.33.4-beta --with-http_ssl_module --with-http_spdy_module --with-ipv6 --with-http_gzip_static_module --with-ld-opt=-flto --with-cc-opt='-O3 -flto -march=native'

[oschaaf]

This looks like this issue: #1096
Which was resolved via #1098
Cherry-picking b88e067 should fix the problem

[oschaaf]

I double checked, but the fix is this is included in the upcoming release, so I am Closing this issue. Feel free to re-open if you still have a problem after patching in the commit I mentioned.