The setup is the following:

• 1 SNS topic, FIFO=true
• 3 SQS queues, FIFO=true, all subscribed to above topic

Rust client binary that does the following:

• Submit 100 messages to SNS topic
• Receive 100 messages from all 3 queues

Due to the FIFO setting, one would expect that the 3 100-message vectors collected from each queue are identical. However, this is not the case.

./setup_localstack.sh
(source .env && cargo run)

Observe panic due to message vectors not being equal.