Error "invalid memory address or nil pointer dereference" using docker-compose

[nyancow]

Hi! This seems like an awesome service, especially for self-hosters like myself.

Running urlsh using docker-compose, the server and its requirements all seem to run fine, but when I click the "Shorten" button I receive a HTTP 500 error with the following message:

{"message":"runtime error: invalid memory address or nil pointer dereference","status":500}

I'm not seeing any logs in the docker-compose run, even when launching using APP_ENV=dev.

What could be causing this issue? Any way I can debug it?

Is it possible the error message is acutally coming from Docker (and not from urlsh)?

Thanks.

[Jitendra Adhikari]

hello only by that error message it is difficult to know why or what happened.
can you try - ensuring db tables are created, go version 1.16, maybe helps.

[nyancow]

Are there any changes I can make to the code to get a more verbose output of the error? Maybe a stack trace or line number?

I tried adding logLevel = logger.Error to orm/postgres.go, bu tthis didn't seem to have any effect on log output.

[Jitendra Adhikari]

that will have more verbose in the console log not in the web/API response

[nyancow]

I realize that, but I don't see any console output either.

[nyancow]

I added a few fmt.Prints throughout orm/postgres.go to try and detect where it was failing.

dsn was set to postgres://${POSTGRES_USER}:${POSTGRES_PASSWORD}@${POSTGRES_HOST:-urlshdb}:${POSTGRES_PORT:-5432}/${POSTGRES_DB} (literally), so the environment variables weren't being resolved properly from my .env file.

The solution was to modify my .env so that DATABASE_URL explicitly defines all of the required elements (without variables).

[Jitendra Adhikari]

that's nice then :D