bucket_create_one

main.tf

provider "aws" {
  region = "us-east-2"
}

module "bucket" {
  source = "./s3_bucket"
  name   = "testbucketkjhqer98iuh"
}

s3_bucket-main-first.tf

variable "name" {
  type = string
}

resource "aws_s3_bucket" "b" {
  count = 1
  bucket = var.name
  acl    = "private"

  tags = {
    Name        = var.name
  }
}

output "id" {
  value = aws_s3_bucket.b[0].id
}

s3_bucket-main-second.tf

variable "name" {
  type = string
}

resource "aws_s3_bucket" "b" {
  #count = 1
  bucket = var.name
  acl    = "private"

  tags = {
    Name        = var.name
  }
}

output "id" {
  #value = aws_s3_bucket.b[0].id
  value = aws_s3_bucket.b.id
}

terraform.tfstate-first

{
  "version": 4,
  "terraform_version": "0.12.19",
  "serial": 1,
  "lineage": "e0cd159a-1c52-d321-3215-ffe5323db4ea",
  "outputs": {},
  "resources": [
    {
      "module": "module.bucket",
      "mode": "managed",
      "type": "aws_s3_bucket",
      "name": "b",
      "each": "list",
      "provider": "provider.aws",
      "instances": [
        {
          "index_key": 0,
          "schema_version": 0,
          "attributes": {
            "acceleration_status": "",
            "acl": "private",
            "arn": "arn:aws:s3:::testbucketkjhqer98iuh",
            "bucket": "testbucketkjhqer98iuh",
            "bucket_domain_name": "testbucketkjhqer98iuh.s3.amazonaws.com",
            "bucket_prefix": null,
            "bucket_regional_domain_name": "testbucketkjhqer98iuh.s3.us-east-2.amazonaws.com",
            "cors_rule": [],
            "force_destroy": false,
            "hosted_zone_id": "Z2O1EMRO9K5GLX",
            "id": "testbucketkjhqer98iuh",
            "lifecycle_rule": [],
            "logging": [],
            "object_lock_configuration": [],
            "policy": null,
            "region": "us-east-2",
            "replication_configuration": [],
            "request_payer": "BucketOwner",
            "server_side_encryption_configuration": [],
            "tags": {
              "Name": "testbucketkjhqer98iuh"
            },
            "versioning": [
              {
                "enabled": false,
                "mfa_delete": false
              }
            ],
            "website": [],
            "website_domain": null,
            "website_endpoint": null
          },
          "private": "bnVsbA=="
        }
      ]
    }
  ]
}

terraform.tfstate-second

{
  "version": 4,
  "terraform_version": "0.12.19",
  "serial": 2,
  "lineage": "e0cd159a-1c52-d321-3215-ffe5323db4ea",
  "outputs": {},
  "resources": [
    {
      "module": "module.bucket",
      "mode": "managed",
      "type": "aws_s3_bucket",
      "name": "b",
      "each": "list",
      "provider": "provider.aws",
      "instances": [
        {
          "schema_version": 0,
          "attributes": {
            "acceleration_status": "",
            "acl": "private",
            "arn": "arn:aws:s3:::testbucketkjhqer98iuh",
            "bucket": "testbucketkjhqer98iuh",
            "bucket_domain_name": "testbucketkjhqer98iuh.s3.amazonaws.com",
            "bucket_prefix": null,
            "bucket_regional_domain_name": "testbucketkjhqer98iuh.s3.us-east-2.amazonaws.com",
            "cors_rule": [],
            "force_destroy": false,
            "hosted_zone_id": "Z2O1EMRO9K5GLX",
            "id": "testbucketkjhqer98iuh",
            "lifecycle_rule": [],
            "logging": [],
            "object_lock_configuration": [],
            "policy": null,
            "region": "us-east-2",
            "replication_configuration": [],
            "request_payer": "BucketOwner",
            "server_side_encryption_configuration": [],
            "tags": {
              "Name": "testbucketkjhqer98iuh"
            },
            "versioning": [
              {
                "enabled": false,
                "mfa_delete": false
              }
            ],
            "website": [],
            "website_domain": null,
            "website_endpoint": null
          },
          "private": "bnVsbA=="
        }
      ]
    }
  ]
}