SAST fails to analyze Scala project: lstat /proc/1/fd/5: no such file or directory

Summary

SAST fails to analyze Scala sbt projects. This error shows up in the log:

lstat /proc/1/fd/5: no such file or directory

Steps to reproduce

Enable SAST on a Scala sbt project
Run the pipeline

Example Project

https://gitlab.com/gitlab-org/security-products/tests/scala-sbt

See https://gitlab.com/gitlab-org/security-products/tests/sast/-/jobs/74330511.

What is the current bug behavior?

SAST fails when it should not:

[success] Total time: 35 s, completed Jun 12, 2018 1:18:39 PM
2018/06/12 13:18:39 lstat /proc/1/fd/5: no such file or directory
2018/06/12 13:18:39 Container exited with non zero status code
ERROR: Job failed: exit code 1

What is the expected correct behavior?

Should not fail.

Investigation

The problem only occurs when running find-sec-bugs-sbt:11-0-stable from sast:11-0-stable. Everything works fine when running find-sec-bugs-sbt:11-0-stable directly on the exact same project:

docker run ---rm --volume $PWD:/tmp/code --env CI_PROJECT_DIR=/tmp/code \
registry.gitlab.com/gitlab-org/security-products/analyzers/find-sec-bugs-sbt:11-0-stable

Here are the last lines of the output:

[info] Done compiling.                                                                                       
[success] Total time: 21 s, completed Jun 12, 2018 4:27:02 PM                                                                  
The following classes needed for analysis were missing:                                                 
  lambdaDeserialize                                                                                         
  apply                                                                                                  
Warnings generated: 2                                                                                         
Missing classes: 2

/proc/1/fd/5 is created by signalfd and "can be used to accept signals targeted at the caller".