Snapshots not working on Heroku

[robinvdvleuten]

Hi there! Big props for supporting V8js on Heroku through custom packages! I've created the most basic setup I could think of;

$context = <<<JS
// ... 
JS;

$snapshot = V8Js::createSnapshot($context);
$v8 = new V8Js('Laravel', [], [], true, $snapshot);

The snapshot can be created on Heroku as expected, but somehow passing the $snapshot the V8JS instance throws some weird C error;

2018-03-16T12:06:55.612582+00:00 app[web.1]: Received signal 

2018-03-16T12:06:55.612922+00:00 app[web.1]: 11

2018-03-16T12:06:55.613237+00:00 app[web.1]:  <unknown> 

2018-03-16T12:06:55.613547+00:00 app[web.1]: 000000000000

2018-03-16T12:06:55.613830+00:00 app[web.1]: 

2018-03-16T12:06:55.614239+00:00 app[web.1]: 

2018-03-16T12:06:55.614615+00:00 app[web.1]: ==== C stack trace ===============================

2018-03-16T12:06:55.614898+00:00 app[web.1]: 

2018-03-16T12:06:55.615158+00:00 app[web.1]:  [

2018-03-16T12:06:55.615450+00:00 app[web.1]: 0x

2018-03-16T12:06:55.615761+00:00 app[web.1]: 7f02f1c24da5

2018-03-16T12:06:55.616018+00:00 app[web.1]: ]

2018-03-16T12:06:55.616306+00:00 app[web.1]:  [

2018-03-16T12:06:55.616561+00:00 app[web.1]: 0x

2018-03-16T12:06:55.616868+00:00 app[web.1]: 7f02ef6264b0

2018-03-16T12:06:55.617147+00:00 app[web.1]: ]

2018-03-16T12:06:55.617404+00:00 app[web.1]:  [

2018-03-16T12:06:55.617694+00:00 app[web.1]: 0x

2018-03-16T12:06:55.617981+00:00 app[web.1]: 7f02e7c213e4

2018-03-16T12:06:55.618908+00:00 app[web.1]: ]

2018-03-16T12:06:55.619221+00:00 app[web.1]:  [

2018-03-16T12:06:55.619480+00:00 app[web.1]: 0x

2018-03-16T12:06:55.619787+00:00 app[web.1]: 7f02e7c0bab8

2018-03-16T12:06:55.620072+00:00 app[web.1]: ]

2018-03-16T12:06:55.620326+00:00 app[web.1]:  [

2018-03-16T12:06:55.620614+00:00 app[web.1]: 0x

2018-03-16T12:06:55.620959+00:00 app[web.1]: 7f02e7c0ca0d

2018-03-16T12:06:55.621214+00:00 app[web.1]: ]

2018-03-16T12:06:55.621505+00:00 app[web.1]:  [

2018-03-16T12:06:55.621800+00:00 app[web.1]: 0x

2018-03-16T12:06:55.622074+00:00 app[web.1]: 7f02e7c0c90d

2018-03-16T12:06:55.622328+00:00 app[web.1]: ]

2018-03-16T12:06:55.622583+00:00 app[web.1]:  [

2018-03-16T12:06:55.622802+00:00 app[web.1]: 0x

2018-03-16T12:06:55.623089+00:00 app[web.1]: 7f02e7c14f2b

2018-03-16T12:06:55.623321+00:00 app[web.1]: ]

2018-03-16T12:06:55.623538+00:00 app[web.1]:  [

2018-03-16T12:06:55.623792+00:00 app[web.1]: 0x

2018-03-16T12:06:55.624025+00:00 app[web.1]: 7f02e76703ef

2018-03-16T12:06:55.624240+00:00 app[web.1]: ]

2018-03-16T12:06:55.624456+00:00 app[web.1]

:  [

2018-03-16T12:06:55.624675+00:00 app[web.1]: 0x

2018-03-16T12:06:55.624910+00:00 app[web.1]: 7f02e7652577

2018-03-16T12:06:55.625147+00:00 app[web.1]: ]

2018-03-16T12:06:55.625353+00:00 app[web.1]:  [

2018-03-16T12:06:55.625558+00:00 app[web.1]: 0x

2018-03-16T12:06:55.625779+00:00 app[web.1]: 7f02e7607474

2018-03-16T12:06:55.625987+00:00 app[web.1]: ]

2018-03-16T12:06:55.626192+00:00 app[web.1]:  [

2018-03-16T12:06:55.626398+00:00 app[web.1]: 0x

2018-03-16T12:06:55.626619+00:00 app[web.1]: 7f02e75e8100

2018-03-16T12:06:55.626843+00:00 app[web.1]: ]

2018-03-16T12:06:55.627097+00:00 app[web.1]:  [

2018-03-16T12:06:55.627303+00:00 app[web.1]: 0x

2018-03-16T12:06:55.627519+00:00 app[web.1]: 7f02e7ddbbda

2018-03-16T12:06:55.627763+00:00 app[web.1]: ]

2018-03-16T12:06:55.627988+00:00 app[web.1]:  [

2018-03-16T12:06:55.628345+00:00 app[web.1]: 0x0000007c03b6]

2018-03-16T12:06:55.628539+00:00 app[web.1]:  [0x0000007c167e]

2018-03-16T12:06:55.628702+00:00 app[web.1]:  [0x000000710043]

2018-03-16T12:06:55.628860+00:00 app[web.1]:  [0x0000006ab670]

2018-03-16T12:06:55.629009+00:00 app[web.1]:  [0x0000004383b9]

2018-03-16T12:06:55.629157+00:00 app[web.1]:  [0x7f02ef611830]

2018-03-16T12:06:55.629305+00:00 app[web.1]:  [0x0000004391e9]

2018-03-16T12:06:55.629458+00:00 app[web.1]: [end of stack trace]

2018-03-16T12:06:55.635279+00:00 app[web.1]: 2018/03/16 12:06:55 [error] 114#0: *3 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 10.36.232.151, server: localhost, request: "GET / HTTP/1.1", upstream: "fastcgi://unix:/tmp/heroku.fcgi.48488.sock:"

The code and snapshotting works as expected when running locally and I've tried it on both php 7.1 and 7.2.