panic: value is null

[josh-barker]

• terrascan version: v1.10.0

Description

terrascan scan

What I Did

Terraform module definition:

variable "name" {
  type = string
}

variable "location" {
  type = string
}

variable "resource_group_name" {
  type = string
}

variable "kind" {
  type    = string
  default = "StorageV2"
}

variable "tier" {
  type    = string
  default = "Standard"
}

variable "replication_type" {
  type    = string
  default = "GRS"
}

variable "network_rules" {
  type = object({
    default_action             = string
    bypass                     = list(string)
    ip_rules                   = list(string)
    virtual_network_subnet_ids = list(string)
  })
  default = {
    default_action             = "Deny"
    bypass                     = null
    ip_rules                   = []
    virtual_network_subnet_ids = []
  }
}

resource "azurerm_storage_account" "this" {
  name                = var.name
  resource_group_name = var.resource_group_name
  location            = var.location

  account_kind              = var.kind
  account_tier              = var.tier
  account_replication_type  = var.replication_type

  network_rules {
    default_action = var.network_rules.default_action
    bypass                     = var.network_rules.bypass
    ip_rules                   = var.network_rules.ip_rules
    virtual_network_subnet_ids = var.network_rules.virtual_network_subnet_ids
  }
}

I found if I commented out network_rules in the resource definition the panic error did not occur.

Stack Trace

panic: value is null

goroutine 16 [running]:
github.com/zclconf/go-cty/cty.Value.LengthInt(0x748b7b8, 0xc0003cac50, 0x0, 0x0, 0xc000fdd050)
        github.com/zclconf/[email protected]/cty/value_ops.go:1063 +0x28b
github.com/zclconf/go-cty/cty.Value.AsValueSlice(0x748b7b8, 0xc0003cac50, 0x0, 0x0, 0x203000, 0x203000, 0xc0000531d9)
        github.com/zclconf/[email protected]/cty/value_ops.go:1299 +0x9d
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.ctyToSlice(0x748b7b8, 0xc0003cac50, 0x0, 0x0, 0xc000c5cd50, 0x1a, 0xffffffffffffffff, 0x0)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:67 +0x85
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.convertComplexType(0x748b7b8, 0xc0003cac50, 0x0, 0x0, 0xc000fdd180, 0x40146e5, 0xc000fdd210, 0xc000c5cd50)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:143 +0x5e
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.convertCtyToGoNative(0x748b7b8, 0xc0003cac50, 0x0, 0x0, 0xc000c5ccf0, 0xc00025b660, 0x67e7e20, 0xc00025b670)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:127 +0xc5
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.ctyToMap(0x748b828, 0xc0003cae80, 0x6943600, 0xc0009b77a0, 0x0, 0x401815d, 0xc00072eb70, 0xc000136ea6)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:107 +0x193
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.convertComplexType(0x748b828, 0xc0003cae80, 0x6943600, 0xc0009b77a0, 0x0, 0xc000330f18, 0x0, 0xc000330ed0)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:145 +0xdd
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.convertCtyToGoNative(0x748b828, 0xc0003cae80, 0x6943600, 0xc0009b77a0, 0x1, 0x0, 0x0, 0x0)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/cty-converters.go:127 +0xc5
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.(*RefResolver).ResolveVarRef(0xc000fddb58, 0xc000136ea0, 0x2f, 0xc000136ea0, 0x2f, 0x67e7e20, 0xc00025b650)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/variable-references.go:83 +0x1b6
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.(*RefResolver).ResolveStrRef(0xc000fddb58, 0xc000136ea0, 0x2f, 0x0, 0x0, 0x10, 0x67e7720)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/references.go:180 +0x32b
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.(*RefResolver).ResolveRefs(0xc000fddb58, 0xc000c5ccc0, 0x11)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/references.go:72 +0x1bd
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.(*RefResolver).ResolveRefs(0xc000fddb58, 0xc000c5cc60, 0x1c)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/references.go:120 +0x85d
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.TerraformDirectoryLoader.loadDirRecursive(0xc00005a8c0, 0x40, 0x0, 0x7489838, 0xc0003e7a10, 0xc000627518, 0x0, 0xc0003e7a70, 0xc00064a200, 0x3, ...)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/load-dir.go:203 +0x95f
github.com/accurics/terrascan/pkg/iac-providers/terraform/commons.TerraformDirectoryLoader.LoadIacDir(0xc00005a8c0, 0x40, 0x0, 0x7489838, 0xc0003e7a10, 0xc000627518, 0x0, 0xc0003e7a70, 0x0, 0x0, ...)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/commons/load-dir.go:123 +0x2b5
github.com/accurics/terrascan/pkg/iac-providers/terraform/v15.(*TfV15).LoadIacDir(0x899fc18, 0xc00005a8c0, 0x40, 0xc0003e78c0, 0x0, 0x0, 0x0)
        github.com/accurics/terrascan/pkg/iac-providers/terraform/v15/load-dir.go:30 +0xb4
github.com/accurics/terrascan/pkg/runtime.(*Executor).getResourceConfigs.func1(0xc000376500, 0xc0003e78c0, 0xc00061e600, 0x11aa8e78, 0x899fc18)
        github.com/accurics/terrascan/pkg/runtime/executor.go:275 +0x59
created by github.com/accurics/terrascan/pkg/runtime.(*Executor).getResourceConfigs
        github.com/accurics/terrascan/pkg/runtime/executor.go:274 +0x1e5