Crash on unnamed output block

[polynomialspace]

VS Code Version

Version: 1.58.2
Commit: c3f126316369cd610563c75b1b1725e0679adfb3
Date: 2021-07-14T22:10:12.490Z
Electron: 12.0.13
Chrome: 89.0.4389.128
Node.js: 14.16.0
V8: 8.9.255.25-electron.0
OS: Darwin arm64 20.6.0

Extension Version

hashicorp.terraform v2.14.0

Language Server Version

Launching language server: /Users/ash/.vscode/extensions/hashicorp.terraform-2.14.0/lsp/terraform-ls serve
2021/08/04 20:28:02 serve_command.go:150: Starting terraform-ls 0.20.1

Terraform Version

Terraform v1.0.3
on darwin_arm64

Steps To Reproduce

Type output {} and maybe invoke a code format

Expected Behavior

Throw a formatting error probably

Actual Behavior

Crash 😢

Additional context

Relevant part of log:

panic: runtime error: index out of range [0] with length 0

goroutine 70 [running]:
github.com/hashicorp/hcl-lang/decoder.resolveBlockAddress(0x140096185a0, 0x1400ffb5400, 0x0, 0x100f7c3b0, 0x0, 0x0)
	github.com/hashicorp/hcl-lang@v0.0.0-20210803155453-7c098e4940bc/decoder/reference_targets.go:1233 +0x570
github.com/hashicorp/hcl-lang/decoder.(*Decoder).decodeReferenceTargetsForBody(0x1400ffa7d28, 0x1400ffaa210, 0x0, 0x1400ffac100, 0x0, 0x0, 0x100f7c3b0)
	github.com/hashicorp/hcl-lang@v0.0.0-20210803155453-7c098e4940bc/decoder/reference_targets.go:362 +0x37c
github.com/hashicorp/hcl-lang/decoder.(*Decoder).CollectReferenceTargets(0x1400ffa7d28, 0x0, 0x0, 0x0, 0x0, 0x0)
	github.com/hashicorp/hcl-lang@v0.0.0-20210803155453-7c098e4940bc/decoder/reference_targets.go:321 +0x1c4
github.com/hashicorp/terraform-ls/internal/terraform/module.DecodeReferenceTargets(0x140000a81a0, 0x100c60628, 0x140000a81c0, 0x1400635a0c7, 0x14, 0x2, 0x1400d50e000)
	github.com/hashicorp/terraform-ls/internal/terraform/module/module_ops.go:375 +0x2bc
github.com/hashicorp/terraform-ls/internal/terraform/module.(*moduleLoader).executeModuleOp(0x1400d4baf50, 0x100c6b118, 0x1400d507900, 0x1400635a0c7, 0x14, 0x7, 0x0, 0x1400ffcafc0)
	github.com/hashicorp/terraform-ls/internal/terraform/module/module_loader.go:186 +0x784
github.com/hashicorp/terraform-ls/internal/terraform/module.(*moduleLoader).run.func1(0x100c6b118, 0x1400d507900, 0x1400635a0c7, 0x14, 0x7, 0x0, 0x1400ffcafc0, 0x1400d4baf50)
	github.com/hashicorp/terraform-ls/internal/terraform/module/module_loader.go:101 +0x54
created by github.com/hashicorp/terraform-ls/internal/terraform/module.(*moduleLoader).run
	github.com/hashicorp/terraform-ls/internal/terraform/module/module_loader.go:100 +0x16c
[Error - 8:50:23 PM] Connection to server got closed. Server will not be restarted.

This happened in a larger module and it took me a while to spot because it's hard to catch the formatting error when the formatter crashes, which is a pretty funny scenario really.

[radeksimko]

Thank you for the detailed bug report.

This will be fixed as part of #612 which should be part of an upcoming release.

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