cabal-docker-poc

POC to reproduce cabal replication bug on Node LTS 10.16.0 using official docker image.

Build

$ docker build -t poc .

Run

This error will only occur if you follow these steps exactly. First start cabal-cli in one bash session then in the next run the docker command one time, then exit it with CTRL+C, then run it once more.

$ cabal --temp cabal://6c3cc8b90a7fc9558de91fe47cbd23ed72917ade21da07d3ea4e689972bfc6a0
$ docker run --rm -it poc
> CTRL+C
$ docker run --rm -it poc

You may also be able to reproduce this outside of docker, try substituting the docker commands for node index.js in the same order. My host machine is running node 10.16.0 as well and cabal 7.1.5.

Error

On my machine the second time I run the container and all times thereafter I get the output below. Note that this error is not coming from the cabal.swarm() callback.

swarm ok
local key> 24027b0e34203ff10b6ba03bc4d7c7f98aeed6a8871c3aab6285a0eefbafa162
/root/poc/node_modules/multifeed/mux.js:203
      feed.ready(function() { // wait for each feed to be ready before replicating.
           ^

TypeError: Cannot read property 'ready' of undefined
    at /root/poc/node_modules/multifeed/mux.js:203:12
    at Array.forEach (<anonymous>)
    at startFeedReplication (/root/poc/node_modules/multifeed/mux.js:202:11)
    at /root/poc/node_modules/multifeed/index.js:238:7
    at release (/root/poc/node_modules/mutexify/index.js:23:13)
    at /root/poc/node_modules/multifeed/index.js:275:11
    at /root/poc/node_modules/multifeed/index.js:307:27
    at /root/poc/node_modules/hypercore/index.js:213:15
    at apply (/root/poc/node_modules/thunky/index.js:44:12)
    at process._tickCallback (internal/process/next_tick.js:63:19)