typelevel
NPE when dealing with a throwable with null message (failed IO)
Hi, thanks for the great work on this lib & others !
Steps to reproduce : fail a traced http route, for instance with IO.raiseError(new RuntimeException)
Expected : no "error.message" mapping, or default to empty string Actual : NullPointerException is raised by Natchez Middleware, as the Circe Encoder fails to encode null value as a string (used with LogTracer).
https://github.com/tpolecat/natchez-http4s/blob/main/modules/http4s/src/main/scala/natchez/http4s/NatchezMiddleware.scala#L62 -> I guess we cannot expect every java + scala codebase with dependencies to always have a message value, and I believe this line should be null checked.
Also in core natchez, a fail-fast null check on put method could be helpful.
