COPY does not seem to recursively copy contents of files

[poy]

Actual behavior
COPY results in the expected directory structure and files, but the files are empty.

Expected behavior
When using the COPY command on a directory structure that has some depth, I would expect the files and their contents to be copied.

To Reproduce
Steps to reproduce the behavior:

1. Create the following cloudbuild.yaml:

steps:
- id: 'prepare workspace'
  name: ubuntu
  entrypoint: 'bash'
  args:
  - "-c"
  - |
    set -eux

    mkdir -p /workspace/public/getting-started/install

    echo "some-content" > /workspace/public/getting-started/install/index.html

    cat << EOF > /workspace/Dockerfile
    FROM ubuntu:latest
    COPY public /workspace
    EOF

- name: 'gcr.io/kaniko-project/executor'
  dir: '/workspace'
  args:
  - --destination=gcr.io/${PROJECT_ID}/some-image:latest

- name: gcr.io/${PROJECT_ID}/some-image:latest
  entrypoint: 'bash'
  args:
  - "-c"
  - |
    set -eux

    size=$(ls -al /workspace/public/getting-started/install/index.html | awk '{print $5}')
    if [ ${size} == 0 ]; then
      echo "FAIL: file is empty"
      exit 1
    fi

    echo "SUCCESS: file is not empty"

2. Run in cloud build:

gcloud builds submit . --config=cloudbuild.yaml

Additional Information

• Dockerfile
  Please provide either the Dockerfile you're trying to build or one that can reproduce this error.
• Build Context
  Please provide or clearly describe any files needed to build the Dockerfile (ADD/COPY commands)
• Kaniko Image (fully qualified with digest)

Triage Notes for the Maintainers

Description	Yes/No
Please check if this a new feature you are proposing
Please check if the build works in docker but not in kaniko
Please check if this error is seen when you use --cache flag
Please check if your dockerfile is a multistage dockerfile