[Bug]: perpetual diff on template

[bakerbl]

Terraform Core Version

v0.14.11

AWS Provider Version

3.74.2, 4.48.0

Affected Resource(s)

aws_cloudformation_stack

Expected Behavior

When running a plan with no changes to the template_body, we should see no reported changes on the aws_cloudformation_stack

Actual Behavior

With no changes to the aws_cloudformation_stack.template_body the plan is reporting changes.

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

repro.zip

Steps to Reproduce

These files will create a VPC and an auto-scaling clamav virus scanning system as described/defined here.
I was able to reference the vpc stack via url, but had to copy and modify the clamav template locally (see repo.zip)

1. terraform init
2. terraform apply
3. terraform plan

Debug Output

logs.txt

Panic Output

No response

Important Factoids

We were initially seeing this on aws provider v3.74.2 so we upgraded to 4.48.0 but the problem still persists. Any help is much appreciated! Thank you!

References

This symptom also occurs in the following bugs I found, but were reportedly fixed in v2.44.0:

• terraform continually detects changes aws_cloudformation_stack #8465
• aws_cloudformation_stack should use 'Original' template instead of 'Processed' to detect change #6662

Would you like to implement a fix?

None

[github-actions]

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