"Dream.debug" doesn't seem to be working

[boechat107]

I used a modified version of the example 2-middleware to test logging, and I couldn't figure out why Dream.debug is not producing any messages even when setting the logging level to Debug.

let () =
  Dream.initialize_log ~level:`Debug ();
  Dream.run
  @@ Dream.logger
  @@ fun _ ->
      Dream.debug (fun log -> log "hello %s" "world");
      Dream.html "Good morning, world!"

If I replace Dream.debug with Dream.info, I see the expected logging message. I also added SQL sessions to check if I get any debug message:

let () =
  Dream.initialize_log ~level:`Debug ();
  Dream.run
  @@ Dream.logger
  @@ Dream.sql_pool "sqlite3:test.sqlite"
  @@ Dream.sql_sessions
  @@ fun _ ->
      Dream.debug (fun log -> log "hello %s" "world");
      Dream.html "Good morning, world!"

This version produces debug messages describing the queries executed to get sessions, but I still couldn't see my "hello world":

27.02.25 13:37:59.436                       Running at http://localhost:8080
27.02.25 13:37:59.436                       Type Ctrl+C to stop
27.02.25 13:38:10.657    dream.logger  INFO REQ 1 GET / ::1:53645 fd 8 Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.0 Safari/537.36
27.02.25 13:38:10.660   caqti.request DEBUG REQ 1 Sending (unit -->. unit) {|PRAGMA foreign_keys = ON|}
27.02.25 13:38:10.662   caqti.request DEBUG REQ 1 Sending (string -->? string × float × string) {|SELECT label, expires_at, payload FROM dream_session WHERE id = $1|}
27.02.25 13:38:10.663    dream.logger  INFO REQ 1 200 in 6141 μs

Am I missing anything?

[marijanp]

Running into the same issue, so confusing @aantron

[marijanp]

Interestingly, because I needed these logs during development, I replaced all Dream.debug invocations with Dream.info. Now I don't see the caqti related debug logs anymore.

[futurGH]

Was also stumped by this!