Terraform crash converting tuple to list of objects with optional attributes

[Nuru]

Terraform Version

Terraform v1.3.4
on darwin_amd64

Terraform Configuration Files

Click to reveal

File bug.auto.tfvars

lifecycle_configuration_rules = [
  # Be sure to cover https://github.com/cloudposse/terraform-aws-s3-bucket/issues/137
  {
    abort_incomplete_multipart_upload_days = 1
    enabled                                = true
    # test no filter
    id = "nofilter"
    noncurrent_version_expiration = {
      newer_noncurrent_versions = 2
      noncurrent_days           = 30
    }
    transition = [
      {
        days          = 7
        storage_class = "GLACIER"
      },
    ]

  },
  {
    enabled = true
    expiration = {
      days                         = 93
      expired_object_delete_marker = false
    }
    # test filter without prefix
    filter_and = {
      object_size_greater_than = 256 * 1024
    }
    id = "big"
    noncurrent_version_expiration = {
      newer_noncurrent_versions = 2
      noncurrent_days           = 14
    }
    transition = [
      {
        days          = 90
        storage_class = "GLACIER"
      },
    ]
  }
]

File bug.tf

variable "lifecycle_configuration_rules" {
  type = list(object({
    enabled = optional(bool, true)
    id      = string # must be unique

    abort_incomplete_multipart_upload_days = optional(number)

    filter_and = optional(object({
      object_size_greater_than = optional(number) # integer >= 0
      object_size_less_than    = optional(number) # integer >= 1
      prefix                   = optional(string)
      tags                     = optional(map(string), {})
    }))
    expiration = optional(object({
      date                         = optional(string) # RFC3339 time format, GMT
      days                         = optional(number) # integer > 0
      expired_object_delete_marker = optional(bool)
    }))
    noncurrent_version_expiration = optional(object({
      newer_noncurrent_versions = optional(number) # integer > 0
      noncurrent_days           = optional(number) # integer >= 0
    }))
    transition = optional(list(object({
      date          = optional(string) # RFC3339 time format
      days          = optional(number) # integer > 0
      storage_class = string           # string/enum, one of GLACIER, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, DEEP_ARCHIVE, GLACIER_IR.
    })))
    noncurrent_version_transition = optional(list(object({
      newer_noncurrent_versions = optional(number) # integer >= 0
      noncurrent_days           = optional(number) # integer >= 0
      storage_class             = string           # string/enum, one of GLACIER, STANDARD_IA, ONEZONE_IA, INTELLIGENT_TIERING, DEEP_ARCHIVE, GLACIER_IR.
    })))
  }))
  default     = []
  description = "A list of lifecycle V2 rules"
}

output "lifecycle_configuration_rules" {
  value = var.lifecycle_configuration_rules
}

Debug Output

Stack trace

!!!!!!!!!!!!!!!!!!!!!!!!!!! TERRAFORM CRASH !!!!!!!!!!!!!!!!!!!!!!!!!!!!

inconsistent list element types (cty.Object(map[string]cty.Type{"abort_incomplete_multipart_upload_days":cty.Number, "enabled":cty.Bool, "expiration":cty.Object(map[string]cty.Type{"date":cty.String, "days":cty.Number, "expired_object_delete_marker":cty.Bool}), "filter_and":cty.Object(map[string]cty.Type{"tags":cty.Map(cty.String)}), "id":cty.String, "noncurrent_version_expiration":cty.Object(map[string]cty.Type{"newer_noncurrent_versions":cty.Number, "noncurrent_days":cty.Number}), "noncurrent_version_transition":cty.List(cty.Object(map[string]cty.Type{"newer_noncurrent_versions":cty.Number, "noncurrent_days":cty.Number, "storage_class":cty.String})), "transition":cty.List(cty.Object(map[string]cty.Type{"date":cty.String, "days":cty.Number, "storage_class":cty.String}))}) then cty.Object(map[string]cty.Type{"abort_incomplete_multipart_upload_days":cty.Number, "enabled":cty.Bool, "expiration":cty.Object(map[string]cty.Type{"date":cty.String, "days":cty.Number, "expired_object_delete_marker":cty.Bool}), "filter_and":cty.Object(map[string]cty.Type{"object_size_greater_than":cty.Number, "object_size_less_than":cty.Number, "prefix":cty.String, "tags":cty.Map(cty.String)}), "id":cty.String, "noncurrent_version_expiration":cty.Object(map[string]cty.Type{"newer_noncurrent_versions":cty.Number, "noncurrent_days":cty.Number}), "noncurrent_version_transition":cty.List(cty.Object(map[string]cty.Type{"newer_noncurrent_versions":cty.Number, "noncurrent_days":cty.Number, "storage_class":cty.String})), "transition":cty.List(cty.Object(map[string]cty.Type{"date":cty.String, "days":cty.Number, "storage_class":cty.String}))}))
goroutine 12 [running]:
runtime/debug.Stack()
	/usr/local/go/src/runtime/debug/stack.go:24 +0x65
runtime/debug.PrintStack()
	/usr/local/go/src/runtime/debug/stack.go:16 +0x19
github.com/hashicorp/terraform/internal/logging.PanicHandler()
	/Users/distiller/project/project/internal/logging/panic.go:55 +0x153
panic({0x2de7d80, 0xc000ca1670})
	/usr/local/go/src/runtime/panic.go:884 +0x212
github.com/zclconf/go-cty/cty.ListVal({0xc00063fa80, 0x2, 0x1?})
	/Users/distiller/go/pkg/mod/github.com/zclconf/go-cty@v1.12.0/cty/value_init.go:166 +0x42e
github.com/zclconf/go-cty/cty.transform({0x0?, 0x0, 0x0}, {{{0x37727f0?, 0xc000ca0bf0?}}, {0x2cf61a0?, 0xc0003dd128?}}, {0x3759b60, 0xc000014dd8})
	/Users/distiller/go/pkg/mod/github.com/zclconf/go-cty@v1.12.0/cty/walk.go:175 +0xf4a
github.com/zclconf/go-cty/cty.TransformWithTransformer(...)
	/Users/distiller/go/pkg/mod/github.com/zclconf/go-cty@v1.12.0/cty/walk.go:130
github.com/hashicorp/hcl/v2/ext/typeexpr.(*Defaults).Apply(0xc000053e20?, {{{0x37727f0?, 0xc000ca0bf0?}}, {0x2cf61a0?, 0xc0003dd128?}})
	/Users/distiller/go/pkg/mod/github.com/hashicorp/hcl/v2@v2.14.1/ext/typeexpr/defaults.go:38 +0xa7
github.com/hashicorp/terraform/internal/terraform.prepareFinalInputVariableValue({{0x0, 0x0, 0x0}, {{}, {0xc00039e920, 0x1d}}}, 0xc000232a80, 0xc0003b5ee0)
	/Users/distiller/project/project/internal/terraform/eval_variable.go:140 +0xaed
github.com/hashicorp/terraform/internal/terraform.(*NodeRootVariable).Execute(0xc00099c280, {0x3788db8, 0xc0005a8460}, 0x0?)
	/Users/distiller/project/project/internal/terraform/node_root_variable.go:82 +0x214
github.com/hashicorp/terraform/internal/terraform.(*ContextGraphWalker).Execute(0xc000ca4000, {0x3788db8, 0xc0005a8460}, {0xcb8be38, 0xc00099c280})
	/Users/distiller/project/project/internal/terraform/graph_walk_context.go:136 +0xc2
github.com/hashicorp/terraform/internal/terraform.(*Graph).walk.func1({0x2f57800, 0xc00099c280})
	/Users/distiller/project/project/internal/terraform/graph.go:74 +0x2f0
github.com/hashicorp/terraform/internal/dag.(*Walker).walkVertex(0xc00097c840, {0x2f57800, 0xc00099c280}, 0xc00063f640)
	/Users/distiller/project/project/internal/dag/walk.go:381 +0x2f6
created by github.com/hashicorp/terraform/internal/dag.(*Walker).Update
	/Users/distiller/project/project/internal/dag/walk.go:304 +0xf65

Expected Behavior

Output should have been normalized input

Actual Behavior

Terraform crash

Steps to Reproduce

1. terraform plan

Additional Context

Issue created at the request of @liamcervante with minimal reproduction requiring no providers.

References

• "inconsistent set element types" crash #31978 (comment)
• "inconsistent set element types" crash #31978
• Terraform[1] - inconsistent list element types #32048
• Terraform v1.3.3 crash: inconsistent map element types #32094
• Backport of Convert variable types before applying defaults into v1.3 #32139

[liamcervante]

Hi @Nuru, thanks for this and I can confirm that I can replicate it.

Having looked at this closer, I think it's the same root cause as in #32157. As such I will close this as a duplicate, but I do appreciate you filing it, and I will include your specific reproduction in my tests to make sure it is properly fixed. I wouldn't have been able to track down the root cause without your reproduction config.

For more context it's the default value on the tags field within filter_and that is causing the crash. I'll include a smaller reproduction at the end of this comment that highlights this. Depending on your use case you could workaround this by setting an empty object as the default for filter_and, or removing the default value for tags. You might be relying on a difference between empty and null somewhere else though, so the workaround may not be possible.

I'll get this fixed for v1.3.5.

Smaller reproduction

main.tf

variable "lifecycle_configuration_rules" {
  type = list(object({
    id      = string
    filter_and = optional(object({
      object_size_greater_than = optional(number) # integer >= 0
      tags                     = optional(map(string), {})
    }))
  }))
  default     = []
  description = "A list of lifecycle V2 rules"
}

output "lifecycle_configuration_rules" {
  value = var.lifecycle_configuration_rules
}

test.auto.tfvars

lifecycle_configuration_rules = [
  { 
    id = "nofilter"
  },
  {
    id = "big"
    filter_and = {
      object_size_greater_than = 256 * 1024
    }
  }
]

[liamcervante]

Duplicate of #32157

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