init.

Dockerfile

@@ -0,0 +1,8 @@
+FROM --platform=linux/amd64 python:3.12.2-slim
+
+RUN mkdir /opt/application
+WORKDIR /opt/application
+
+COPY code.py ./
+
+RUN echo "foo"

README.md

@@ -0,0 +1,35 @@
+To reproduce the issue within AWS ECR:
+
+Enable the `containerd image store` as per https://docs.docker.com/build/cache/backends/ by adding the following to the Docker features:
+
+```
+"features": {
+    "containerd-snapshotter": true
+}
+```
+
+ref: https://docs.docker.com/engine/storage/containerd/#enable-containerd-image-store-on-docker-engine
+
+Sign in to AWS ECR:
+
+```
+aws ecr get-login-password --region us-east-2 | docker login --username AWS --password-stdin 211125654114.dkr.ecr.us-east-2.amazonaws.com
+```
+
+Build this image:
+
+```
+docker build -t 211125654114.dkr.ecr.us-east-2.amazonaws.com/test-immutable:bar .
+```
+
+Push this image:
+
+```
+docker push 211125654114.dkr.ecr.us-east-2.amazonaws.com/test-immutable:bar
+```
+
+This yields:
+
+```
+failed commit on ref "manifest-sha256:b1046f6218c477a57f78da412bdf0e9225359b4f46f01a30f7929a3517a59e5f": unexpected status from PUT request to https://211125654114.dkr.ecr.us-east-2.amazonaws.com/v2/test-immutable/manifests/bar: 400 Bad Request
+```

code.py

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+print("hello world")