Duplicate variable declaration

[esacteksab]

Summary

I had a duplicate variable declared in variables.tf, tflint found nothing. But terraform validate produces an error (a plan/apply also errors). The error is 'Duplicate variable declaration'. This feels like a bug, and feels like something tflint should be able to detect and possibly address with --fix though it is possible for duplicate variables to exist, but their description, type, default, could be different, so it may be difficult to determine which one to delete.

Command

tflint

Terraform Configuration

"unhealthy_threshold" {
  description = "The number of consecutive health check failures required before considering the target unhealthy. For Network Load Balancers, this value must be the same as the healthy_threshold. Defaults to 3."
  type        = string
  default     = 3
}

variable "unhealthy_threshold" {
  description = "The number of consecutive health check failures required before considering the target unhealthy. For Network Load Balancers, this value must be the same as the healthy_threshold. Defaults to 3."
  type        = string
  default     = 3
}

TFLint Configuration

Not using one.

Output

No error printed. Terraform emits the following message


terraform validate
╷
│ Error: Duplicate variable declaration
│ 
│   on variables.tf line 242:
│  242: variable "unhealthy_threshold" {
│ 
│ A variable named "unhealthy_threshold" was already declared at variables.tf:236,1-31. Variable names must be unique within a module.

### TFLint Version

0.50.2

### Terraform Version

1.6.5

### Operating System

- [ ] Linux
- [X] macOS
- [ ] Windows