Severity level is contained twice in the log message row

[aryoda]

Why is the severity level (here: "error") contained twice?

> library(tryCatchLog)
Using futile.logger for logging...
> tryCatchLog(stop("msg"))
ERROR [2021-01-08 18:58:30] [ERROR] msg

Compact call stack:
  1 tryCatchLog(stop("msg"))
...

This could be caused by futile logger...

[aryoda]

Analysis results:

The reason seems to be that

• tryCatchLog includes the severity level in the function build.log.output
• futile.logger as well as the internal logging function prepend the severity level too when a flog function is called

> flog.warn("msg")
WARN [2021-01-08 20:14:07] msg
> tryCatchLog:::log2console("WARN", "msg")
WARN [2021-01-08 20:19:06] msg

tryCatchLog should not include the severity level in the msg text itself but leave this to the logger function that corresponds to the severity level.

The bug was probably already introduced in commit 7c8e245 (Dec 3, 2017)!