Failed to create cache

Summary

The cache failed to create.

Steps to reproduce

Trigger a build job with configured cache.

Actual behavior

The build succeeds but the cache can not be created.

Expected behavior

The cache can be created.

Relevant logs and/or screenshots

build log:

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Creating cache Build...

Failed to create cache

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Uploading artifacts...

tests/**/bin/**/*: found 780 matching files        
Uploading artifacts to coordinator... ok            id=6388 responseStatus=201 Created token=DF7-JDKR
Build succeeded

gitlab-ci.yml:

stages:
  - build
  - test

.artifacts_template: &artifacts_definition
  artifacts:
    name: "${CI_PIPELINE_ID}_${CI_BUILD_REF}"
    paths:
      - tests/**/bin/**/*
    expire_in: 10 min

Build:
  stage: build
  script:
    - ./build.ps1 -Target Build
  cache:
    key: "${CI_BUILD_NAME}"
    paths:
      - packages/
      - tools/
  <<: *artifacts_definition
  tags:
    - DevExpress:16.1.7

xUnit:
  stage: test
  script:
    - ./build.ps1 -Target Test
  cache:
    key: "${CI_BUILD_NAME}"
    paths:
      - tools/

Environment description

• Windows 10 with all current available updates.
• Executor: Shell
• Shell: Powershell

Used GitLab Runner version

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386

Additional

Complete Build log of both named stages: Stage: build

Running with gitlab-ci-multi-runner 1.8.1 (a2efdd4)
Using Shell executor...
Running on GIT02...

Fetching changes...

Removing packages/
Removing tools/
HEAD is now at 85f3c26 Merge branch 'update-engine' into 'master'

From https://git.nsc-gmbh.de/patrick.sadowski/ACX.Suite
 * [new branch]      remove-measurement-layer -> origin/remove-measurement-layer
Checking out 5aa2e304 as remove-measurement-layer...

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Checking cache for Build...

Successfully extracted cache

$ ./build.ps1 -Target Build

******************* buildscript output *******************

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Creating cache Build...

Failed to create cache

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Uploading artifacts...

tests/**/bin/**/*: found 780 matching files        
Uploading artifacts to coordinator... ok            id=6388 responseStatus=201 Created token=DF7-JDKR
Build succeeded

Stage: Test

Running with gitlab-ci-multi-runner 1.8.1 (a2efdd4)
Using Shell executor...
Running on GIT03...

Fetching changes...

Removing artifacts/
Removing tools/
HEAD is now at 85f3c26 Merge branch 'update-engine' into 'master'

Checking out 5aa2e304 as remove-measurement-layer...

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Checking cache for xUnit...

Successfully extracted cache

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Downloading artifacts for Build (6388)...

Downloading artifacts from coordinator... ok        id=6388 responseStatus=200 OK token=DF7-JDKR
$ ./build.ps1 -Target Test

******************* buildscript output *******************

Version:      1.8.1
Git revision: a2efdd4
Git branch:   1-8-stable
GO version:   go1.7.3
Built:        Tue, 29 Nov 2016 13:53:55 +0000
OS/Arch:      windows/386
Creating cache xUnit...

Failed to create cache

Build succeeded

/cc @nick.thomas @tmaczukin @ayufan