{"record":{"id":"de1a7bd29bc49443","repo":"go-task/task","slug":"task-output-style-q-does-not-support-the-group-b","errorCode":null,"errorMessage":"task: output style %q does not support the group begin/end parameter","messagePattern":"task: output style %q does not support the group begin/end parameter","errorType":"validation","errorClass":null,"httpStatus":null,"severity":"error","filePath":"internal/output/output.go","lineNumber":44,"sourceCode":"\tcase \"group\":\n\t\treturn Group{\n\t\t\tBegin:     o.Group.Begin,\n\t\t\tEnd:       o.Group.End,\n\t\t\tErrorOnly: o.Group.ErrorOnly,\n\t\t}, nil\n\tcase \"prefixed\":\n\t\tif err := checkOutputGroupUnset(o); err != nil {\n\t\t\treturn nil, err\n\t\t}\n\t\treturn NewPrefixed(logger), nil\n\tdefault:\n\t\treturn nil, fmt.Errorf(`task: output style %q not recognized`, o.Name)\n\t}\n}\n\nfunc checkOutputGroupUnset(o *ast.Output) error {\n\tif o.Group.IsSet() {\n\t\treturn fmt.Errorf(\"task: output style %q does not support the group begin/end parameter\", o.Name)\n\t}\n\treturn nil\n}\n","sourceCodeStart":26,"sourceCodeEnd":48,"githubUrl":"https://github.com/go-task/task/blob/385e5ad92af02877b6d7cf9dcc963b5ed916e70a/internal/output/output.go#L26-L48","documentation":"The `group.begin`/`group.end` output options are only valid with the `group` output style. checkOutputGroupUnset rejects any other style that has a group block set, preventing silently ignored configuration. It is called from BuildFor for styles like `prefixed` before constructing the output wrapper.","triggerScenarios":"A Taskfile sets `output: prefixed` (or another non-group style) together with a `group: {begin: ..., end: ...}` block; the IsSet check on o.Group triggers the error.","commonSituations":"Copying a group-begin/end snippet into a task that also uses `output: prefixed`, merging Taskfiles where one part expects grouped output, or misunderstanding that begin/end markers only apply to `output: group`.","solutions":["Remove the `group:` begin/end block, or switch the output style to `group`","If you need both prefixes and grouping, use `output: group` (which supports prefixes via task-level prefix behavior) rather than prefixed","Keep begin/end markers only under `output: group` configurations"],"exampleFix":"# before\noutput:\n  prefixed: true\n  group:\n    begin: \"::GROUP::\"\n# after\noutput:\n  group:\n    begin: \"::GROUP::\"\n    end: \"::END::\"","handlingStrategy":"validation","validationCode":"if o := taskDef.Output; o != nil && o.Style != \"group\" && (o.GroupBegin != \"\" || o.GroupEnd != \"\") {\n  return fmt.Errorf(\"group begin/end only allowed with output: group\")\n}","typeGuard":null,"tryCatchPattern":"err := t.Run(ctx)\nif err != nil && strings.Contains(err.Error(), \"does not support the group begin/end\") {\n  // either drop the group block or switch style to group\n}","preventionTips":["Pair group.begin/end exclusively with output: group","Review merged Taskfiles for conflicting output options","Add a pre-run config check that flags group keys on non-group styles"],"tags":["taskfile","output","configuration"],"backgroundTag":"incompatible-option-combination","analyzedSha":"385e5ad92af02877b6d7cf9dcc963b5ed916e70a","analyzedAt":"2026-09-05T09:01:05.226Z","contentChangedAt":"2026-09-05T09:01:05.226Z","schemaVersion":2},"datasetVersion":"2026-09-12T12:17:11.808Z"}