Scalafmt breaks code (tuple, trailing comma, RedundantParens)

[yurique]

$ scalafmt --version
scalafmt 3.7.17

Configuration (required)

version=3.7.17
runner.dialect = "scala3"
rewrite.rules = [RedundantParens]

Command-line parameters (required)

scalafmt --stdout scalafmttest.scala

Steps

Given code like this:

def test =
  (
    Option(""),
    ).map(identity)

Problem

Scalafmt formats code like this:

def test =
  Option(""), .map(identity)

Expectation

I would like the formatted output to look like this:

def test =
  Option("").map(identity)

Workaround

¯_(ツ)_/¯ :)

Notes

The trailing comma here is "bad" - I ended up having it by accident (it was a tuple at some point, then I no longer needed a tuple there but didn't clean up the parens and the comma).

In this minified example scalafmt produces broken code, but in my project the file that contained this pattern was larger (though it was simple, no deep nesting etc) – there, scalafmt is exploding with this:

scalafmt: Search state exploded on ',∙.[4915:4926]', line 148

In my case, IDEA is the main driver for scalafmt and in this case the file was just not getting formatted and no messages were shown anywhere – thus I started investigating and ended up with this.