{"id":"6326f2f5dc87fa7b","repo":"jackc/pgx","slug":"unknown-message-type-c","errorCode":null,"errorMessage":"unknown message type: %c","messagePattern":"unknown message type: %c","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pgproto3/backend.go","lineNumber":236,"sourceCode":"\t\t\tmsg = &SASLResponse{}\n\t\tcase AuthTypeSASLFinal:\n\t\t\tmsg = &SASLResponse{}\n\t\tcase AuthTypeGSS, AuthTypeGSSCont:\n\t\t\tmsg = &GSSResponse{}\n\t\tcase AuthTypeCleartextPassword, AuthTypeMD5Password:\n\t\t\tfallthrough\n\t\tdefault:\n\t\t\t// to maintain backwards compatibility\n\t\t\tmsg = &PasswordMessage{}\n\t\t}\n\tcase 'Q':\n\t\tmsg = &b.query\n\tcase 'S':\n\t\tmsg = &b.sync\n\tcase 'X':\n\t\tmsg = &b.terminate\n\tdefault:\n\t\treturn nil, fmt.Errorf(\"unknown message type: %c\", b.msgType)\n\t}\n\n\tmsgBody, err := b.cr.Next(b.bodyLen)\n\tif err != nil {\n\t\treturn nil, translateEOFtoErrUnexpectedEOF(err)\n\t}\n\n\tb.partialMsg = false\n\n\terr = msg.Decode(msgBody)\n\tif err != nil {\n\t\treturn nil, err\n\t}\n\n\tif b.tracer != nil {\n\t\tb.tracer.traceMessage('F', int32(5+len(msgBody)), msg)\n\t}\n","sourceCodeStart":218,"sourceCodeEnd":254,"githubUrl":"https://github.com/jackc/pgx/blob/ec1a0befd22592cffffdeeb0a50311b506372f4c/pgproto3/backend.go#L218-L254","documentation":"Error \"unknown message type: %c\" thrown in jackc/pgx.","triggerScenarios":"Thrown at pgproto3/backend.go:236 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"analyzedSha":"ec1a0befd22592cffffdeeb0a50311b506372f4c","analyzedAt":"2026-08-04T22:52:11.263Z","schemaVersion":2}