{"record":{"id":"f950cf0818074814","repo":"vitessio/vitess","slug":"failed-to-process-type-s-w","errorCode":null,"errorMessage":"failed to process type %s: %w","messagePattern":"failed to process type (.+?): %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"go/tools/asthelpergen/asthelpergen.go","lineNumber":368,"sourceCode":"\t\treturn nil, err\n\t}\n\treturn gen.generateOutputFiles(), nil\n}\n\n// processTypeQueue processes all types in the todo queue with all generators\nfunc (gen *astHelperGen) processTypeQueue() error {\n\talreadyDone := map[string]bool{}\n\tfor len(gen.todo) > 0 {\n\t\tt := gen.todo[0]\n\t\ttypeName := printableTypeName(t)\n\t\tgen.todo = gen.todo[1:]\n\n\t\tif alreadyDone[typeName] {\n\t\t\tcontinue\n\t\t}\n\n\t\tif err := gen.processTypeWithGenerators(t); err != nil {\n\t\t\treturn fmt.Errorf(\"failed to process type %s: %w\", typeName, err)\n\t\t}\n\t\talreadyDone[typeName] = true\n\t}\n\treturn nil\n}\n\n// processTypeWithGenerators dispatches a type to all generators based on its underlying type\nfunc (gen *astHelperGen) processTypeWithGenerators(t types.Type) error {\n\tunderlying := t.Underlying()\n\ttypeName := printableTypeName(t)\n\n\tfor _, g := range gen.gens {\n\t\tvar err error\n\t\tswitch underlying := underlying.(type) {\n\t\tcase *types.Interface:\n\t\t\terr = g.interfaceMethod(t, underlying, gen)\n\t\tcase *types.Slice:\n\t\t\terr = g.sliceMethod(t, underlying, gen)","sourceCodeStart":350,"sourceCodeEnd":386,"githubUrl":"https://github.com/vitessio/vitess/blob/01a25a7d176f94613b8d59d799f438380a8760e4/go/tools/asthelpergen/asthelpergen.go#L350-L386","documentation":"processTypeQueue dequeues each discovered type name and runs it through processTypeWithGenerators. Any failure from a generator is wrapped with this message identifying the type, so the caller knows which type's helper generation failed.","triggerScenarios":"processTypeWithGenerators returns an error for a type (e.g. an unsupported underlying type or a sub-generator failure) while draining the type queue created by createFiles.","commonSituations":"A newly added AST type with an underlying kind no generator supports; cascading failure from an earlier generation bug surfacing at the queue-processing level.","solutions":["Read the wrapped cause (error 449 or a generator failure) and fix the root generator issue","Add or extend a generator to support the type's underlying kind (interface/pointer/struct/basic/map/slice)","Exclude the unsupported type from generation if it should not receive helpers"],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":null,"typeGuard":null,"tryCatchPattern":"if err := gen.createFiles(); err != nil {\n    if strings.HasPrefix(err.Error(), \"failed to process type \") {\n        typeName := extractTypeName(err.Error())\n        log.Printf(\"fix generator for type %s: %v\", typeName, err)\n    }\n    return err\n}","preventionTips":["Read the wrapped cause before changing top-level queue code","Extend generators whenever new AST types with new underlying kinds are added","Run codegen locally after adding any new node type"],"tags":["codegen","type-processing","error-wrapping"],"backgroundTag":"type-processing-failed","analyzedSha":"01a25a7d176f94613b8d59d799f438380a8760e4","analyzedAt":"2026-09-01T17:28:30.605Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-08T15:18:49.778Z"}