"Failed to build droplet release" when go.work exists

[jameshochadel]

What version of Cloud Foundry and CF CLI are you using? (i.e. What is the output of running cf curl /v2/info && cf version?

"api_version":"2.202.0"
cf version 8.2.0+fd8fbca64.2022-02-09

What version of the buildpack you are using?
1.10.8

If you were attempting to accomplish a task, what was it you were attempting to do?

cf push a Go app that uses Go module workspaces. My app had a go.work in the root of the repository that looked like:

go 1.20

use (
	.
	./ci/acceptance
)

The app has a manifest like:

applications:
- command: run-app
  disk_quota: 256M
  env:
    GOPACKAGENAME: github.com/org/app
  memory: 256M
  name: app

What did you expect to happen?

The app is pushed and starts running.

What was the actual behavior?

The build output fails after downloading dependencies:

   -----> Running: go install -tags cloudfoundry -buildmode pie .
   go: downloading github.com/aws/aws-sdk-go v1.44.252
   (...)
   go: downloading golang.org/x/crypto v0.8.0
   Failed to build droplet release: buildpack's release output invalid: yaml: line 5: could not find expected ':'
   Exit status 224
BuildpackReleaseFailed - App staging failed in the buildpack release phase

When I remove the go.work file, the build completes like usual.

Please confirm where necessary:

• I have included a log output
• My log includes an error message
• I have included steps for reproduction