{"record":{"id":"78b982888530f39f","repo":"hashicorp/terraform","slug":"error-initializing-backend-t-s-this-is-a-bug","errorCode":null,"errorMessage":"Error initializing backend %T: %s\n\nThis is a bug; please report it to the backend developer","messagePattern":"Error initializing backend %T: (.+?)\n\nThis is a bug; please report it to the backend developer","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/command/meta_backend.go","lineNumber":179,"sourceCode":"\t\t\t\t\tfmt.Sprintf(\n\t\t\t\t\t\t\"The installed provider plugins are not consistent with the packages selected in the dependency lock file:%s\\n\\nTerraform uses external plugins to integrate with a variety of different infrastructure services. %s\",\n\t\t\t\t\t\tbuf.String(), suggestion,\n\t\t\t\t\t),\n\t\t\t\t))\n\t\t\t\treturn nil, diags\n\t\t\t}\n\t\t} else {\n\t\t\t// All other errors just get generic handling.\n\t\t\tdiags = diags.Append(err)\n\t\t\treturn nil, diags\n\t\t}\n\t}\n\tcliOpts.Validation = true\n\n\t// If the backend supports CLI initialization, do it.\n\tif cli, ok := b.(backendrun.CLI); ok {\n\t\tif err := cli.CLIInit(cliOpts); err != nil {\n\t\t\tdiags = diags.Append(fmt.Errorf(\n\t\t\t\t\"Error initializing backend %T: %s\\n\\n\"+\n\t\t\t\t\t\"This is a bug; please report it to the backend developer\",\n\t\t\t\tb, err,\n\t\t\t))\n\t\t\treturn nil, diags\n\t\t}\n\t}\n\n\t// If the result of loading a backend is an operations backend,\n\t// then return that as-is. This works even if b == nil (it will be !ok).\n\tif enhanced, ok := b.(backendrun.OperationsBackend); ok {\n\t\tlog.Printf(\"[TRACE] Meta.Backend: backend %T supports operations\", b)\n\t\treturn enhanced, nil\n\t}\n\n\t// We either have a non-operations backend configured for state storage\n\t// or none configured at all. In either case, we use local as our operations backend\n\t// and the state-storage backend (if any) to manage state.","sourceCodeStart":161,"sourceCodeEnd":197,"githubUrl":"https://github.com/hashicorp/terraform/blob/d32a084675427f5ac3f7d2868578ef8b2c1dc525/internal/command/meta_backend.go#L161-L197","documentation":"Appended as a diagnostic from `Meta.Backend` when the resolved backend implements `backendrun.CLI` and its `CLIInit(cliOpts)` method returns an error. The message includes the backend's Go type (`%T`) and instructs the user to report it as a bug to the backend developer — because `CLIInit` failing indicates an internal backend defect, not a user-configuration problem (config validation happens earlier).","triggerScenarios":"The backend passed the type assertion `b.(backendrun.CLI)`, so it opts into CLI initialization. `CLIInit` then fails — e.g. an enhanced backend cannot set up its local state manager, cannot initialize an internal client, or hits an invariant violation. This occurs after `Configure` and `PrepareConfig` already succeeded.","commonSituations":"A bug in a third-party or custom backend's `CLIInit`; a local backend that cannot create its state storage directory; a cloud backend whose internal client initialization hits an unexpected state after successful config; version skew between Terraform CLI and the backend plugin.","solutions":["Report the bug to the backend developer, including the `%T` type name and the wrapped `%s` detail.","If using a local backend, ensure the data/state directories are writable and not locked.","Re-run `terraform init` to re-establish backend state cleanly.","Upgrade or downgrade the backend / Terraform CLI to a matching known-good version pair.","If the backend is `cloud`/`remote` and `CLIInit` fails transiently, retry after confirming HCP Terraform / TFE is reachable."],"exampleFix":"// The backend type in the message identifies which backend has the bug.\n// Report to: https://github.com/hashicorp/terraform/issues (for built-in)\n// or the backend plugin's own repo.\n// Workaround: re-init\nterraform init -reconfigure","handlingStrategy":"try-catch","validationCode":"null","typeGuard":"// Detect that a backend opts into CLI init before relying on it.\nif _, ok := b.(backendrun.CLI); ok {\n    // CLIInit may fail — treat its failure as a backend bug, not user error\n}","tryCatchPattern":"// CLIInit failures are backend bugs; surface the %T type to the user for reporting.\nif err := cli.CLIInit(opts); err != nil {\n    return fmt.Errorf(\"backend %T CLIInit failed (bug): %w\", b, err)\n}","preventionTips":["Run `terraform init` after backend changes to exercise CLIInit early.","Keep backend plugins and Terraform CLI versions in lock-step.","Report `CLIInit` failures with the backend type name to the backend maintainer."],"tags":["terraform","backend","init","bug","cli"],"backgroundTag":null,"analyzedSha":"d32a084675427f5ac3f7d2868578ef8b2c1dc525","analyzedAt":"2026-08-11T18:43:52.779Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-23T08:17:48.524Z"}