This happens when you are trying to access a nil pointer. Check from where
the stack trace originates, go to that line and add a "!= nil" check. I
guess that is what's happening.
P.S. Your stack trace is in a json format which is for machines to read,
not humans. While reporting issues, it helps a lot you present your data
(logs, stack trace, etc) in the most clearest way possible.
On Wednesday, 19 June 2019 11:32:09 UTC+5:30, Mayank Jha wrote:
>
> 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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