{"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":"console","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/c9def3e214014c1188faabfc4a5bde5095139765/internal/command/meta_backend.go#L161-L197","documentation":"Appended as a diagnostic in Meta.Backend() when a backend implementation that also satisfies the backendrun.CLI interface fails its CLIInit() call. The message names the backend type (%T) and includes the wrapped error (%s), and explicitly labels it a bug to report to the backend developer — CLIInit failure is considered a backend implementation defect, not a user config problem.","triggerScenarios":"The loaded backend type-asserts to backendrun.CLI and its CLIInit(cliOpts) returns a non-nil error. This is the backend-specific CLI initialization hook (distinct from Configure) failing — e.g. a cloud backend failing to validate CLI-supplied settings, or a plugin backend whose CLI sub-init step errors.","commonSituations":"An out-of-band backend plugin version mismatch where CLIInit expects different options; a custom backend with a bug in its CLIInit implementation; transient failures in a remote backend's CLI bootstrap (e.g. failed metadata fetch).","solutions":["Collect the wrapped %s error and the backend type %T, then report to the backend maintainer as instructed by the message.","If using a third-party backend plugin, upgrade or downgrade it to a version compatible with this Terraform release.","For the built-in cloud backend, verify TF_TOKEN_* / credentials and network reachability of app.terraform.io.","Re-run with TF_LOG=DEBUG to capture the CLIInit call site details."],"exampleFix":"// before: outdated external backend plugin\nterraform plan\n# Error initializing backend *mybackend.MyBackend: ...\n// after: align plugin version\nterraform init -upgrade\nterraform plan","handlingStrategy":"try-catch","validationCode":"// Sanity-check backend implements CLIInit expectations\nif _, ok := b.(backendrun.CLI); ok {\n    log.Printf(\"[INFO] backend %T requires CLIInit; ensure version compatibility\", b)\n}","typeGuard":"func supportsCLIInit(b backend.Backend) bool {\n    _, ok := b.(backendrun.CLI)\n    return ok\n}","tryCatchPattern":null,"preventionTips":["Pin backend plugin versions known compatible with your Terraform release.","Keep third-party backend plugins updated alongside Terraform upgrades.","Report CLIInit failures to the backend maintainer with full TF_LOG=DEBUG output."],"tags":["backend","cli-init","bug-report","plugin"],"analyzedSha":"c9def3e214014c1188faabfc4a5bde5095139765","analyzedAt":"2026-08-07T15:39:49.278Z","schemaVersion":2},"datasetVersion":"2026-08-07T21:17:07.882Z"}