Terraform crashes(invalid memory address) if there's a .tf file in json format

[kjkuan]

To reproduce, create a crash.tf file with the following contents:

{
  "variable": {
    "whatever": "abc123"
  }
}

Then run terraform plan from the same directory, and it will crash with a log that looks like the following:

2016/08/18 14:57:22 [INFO] Terraform version: 0.7.0  e822a79165dbc06bbf8271ee349fe256867d53dc
2016/08/18 14:57:22 [DEBUG] Detected home directory from env var: /Users/jkuan
2016/08/18 14:57:22 [DEBUG] Detected home directory from env var: /Users/jkuan
2016/08/18 14:57:22 [DEBUG] Attempting to open CLI config file: /Users/jkuan/.terraformrc
2016/08/18 14:57:22 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2016/08/18 14:57:22 [DEBUG] Detected home directory from env var: /Users/jkuan
2016/08/18 14:57:22 [DEBUG] plugin: waiting for all plugin processes to complete...
panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xb code=0x1 addr=0x8 pc=0xb3d60a]

goroutine 1 [running]:
panic(0x2fb1ba0, 0x8262f60d0)
        /opt/go/src/runtime/panic.go:481 +0x3e6
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/hcl/ast.(*ObjectList).Filter(0x82661d620, 0x82641d450, 0x1, 0x1, 0x2)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/hcl/ast/ast.go:59 +0xaa
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decodeStruct(0x82641ee68, 0x82661d5e0, 0x16, 0x882637beb0, 0x82661d620, 0x32952c0, 0x826611c70, 0x199, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:608 +0x1dfb
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decode(0x82641ee68, 0x82661d5e0, 0x16, 0x882637bfb0, 0x826611c20, 0x32952c0, 0x826611c70, 0x199, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:108 +0x9a4
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decodePtr(0x82641ee68, 0x82661d5e0, 0x16, 0x882637bfb0, 0x826611c20, 0x253fd60, 0x8264942b0, 0x196, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:397 +0x151
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decode(0x82641ee68, 0x82661d5e0, 0x16, 0x882637bfb0, 0x826611c20, 0x253fd60, 0x8264942b0, 0x196, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:102 +0x862
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decodeMap(0x82641ee68, 0x82663e450, 0xd, 0x882637beb0, 0x82661d5c0, 0x2668d60, 0x826494298, 0x195, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:378 +0x14c5
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decode(0x82641ee68, 0x82663e450, 0xd, 0x882637beb0, 0x82661d5c0, 0x2668d60, 0x826494298, 0x195, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:100 +0x7f4
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decodeStruct(0x82641ee68, 0x37cff48, 0x4, 0x882637beb0, 0x82661d4e0, 0x26a60e0, 0x826494298, 0x199, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:632 +0x2355
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.(*decoder).decode(0x82641ee68, 0x37cff48, 0x4, 0x882637beb0, 0x82661d4e0, 0x26a60e0, 0x826494298, 0x199, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:108 +0x9a4
github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl.DecodeObject(0x25f8620, 0x826494298, 0x882637beb0, 0x82661d4e0, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/hashicorp/hcl/decoder.go:60 +0x25f
github.com/hashicorp/terraform/config.(*hclConfigurable).Config(0x82661d520, 0x37c23b8, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/config/loader_hcl.go:48 +0x3af
github.com/hashicorp/terraform/config.(*importTree).ConfigTree(0x826617800, 0x4c, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/config/import_tree.go:87 +0x68
github.com/hashicorp/terraform/config.LoadFile(0x8266111d0, 0x4c, 0x8264e2420, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/config/loader.go:44 +0x80
github.com/hashicorp/terraform/config.LoadDir(0x8262f80a4, 0x43, 0x11, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/config/loader.go:91 +0x38c
github.com/hashicorp/terraform/config/module.NewTreeModule(0x0, 0x0, 0x8262f80a4, 0x43, 0x0, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/config/module/tree.go:54 +0x41
github.com/hashicorp/terraform/command.(*Meta).Context(0x8265042d0, 0x8262f80a4, 0x43, 0x7fff5fbfea45, 0x24, 0x0, 0xa, 0x4, 0x6, 0x0, ...)
        /opt/gopath/src/github.com/hashicorp/terraform/command/meta.go:155 +0x54a
github.com/hashicorp/terraform/command.(*PlanCommand).Run(0x8265042d0, 0x8262ec570, 0x0, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/command/plan.go:65 +0x7b7
github.com/hashicorp/terraform/vendor/github.com/mitchellh/cli.(*CLI).Run(0x8264d2840, 0x8265075c0, 0x0, 0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/vendor/github.com/mitchellh/cli/cli.go:153 +0x56e
main.wrappedMain(0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/main.go:144 +0xaf9
main.realMain(0x0)
        /opt/gopath/src/github.com/hashicorp/terraform/main.go:80 +0xa10
main.main()
        /opt/gopath/src/github.com/hashicorp/terraform/main.go:23 +0x28

[mitchellh]

Fixed in PR on hcl: hashicorp/hcl#143

[ghost]

I'm going to lock this issue because it has been closed for 30 days ⏳. This helps our maintainers find and focus on the active issues.

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