I am getting the *runtime error: invalid memory address or nil pointer
dereference, *with the following stack trace, but only occasionally when I
try to proto.Marshal() a proto message.
[{"file":"/go/src/github.com/carousell/Cats/Cats/analytics/analytics.go",
> "line":92,"function":"(*producer).Produce.func1"},{"file":
> "/usr/local/go/src/runtime/asm_amd64.s","line":573,"function":"call32"},{
> "file":"/usr/local/go/src/runtime/panic.go","line":502,"function":
> "gopanic"},{"file":"/usr/local/go/src/runtime/panic.go","line":63,
> "function":"panicmem"},{"file":"/usr/local/go/src/runtime/signal_unix.go",
> "line":388,"function":"sigpanic"},{"file":
> "/usr/local/go/src/unicode/utf8/utf8.go","line":483,"function":
> "ValidString"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":2074,"function":"appendUTF8StringValueNoZero"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":270,"function":"(*marshalInfo).marshal"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":2264,"function":"makeMessageSliceMarshaler.func2"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":270,"function":"(*marshalInfo).marshal"{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":2234,"function":"makeMessageMarshaler.func2"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":270,"function":"(*marshalInfo).marshal"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":141,"function":"(*InternalMessageInfo).Marshal"},{"file":
> "/go/src/github.com/carousell/Cats/Cats/Cats_proto/analytics.pb.go","line"
> :447,"function":"(*AdRequestMsg).XXX_Marshal"},{"file":
> "/go/src/github.com/carousell/Cats/vendor/github.com/golang/protobuf/proto/table_marshal.go"
> ,"line":2715,"function":"Marshal"}]
>
>
Have omitted the initial part of the stack trace. Can someone tell me when
all could this happen ? Could it be because of a difference in protobuf
library versions ? I am unable to get the message, as when the panic
happens when the serialization is taking place. Any ideas on how to
approach this kind of problem ?
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