Error formatting if have single open bracket

[tr4r3x]

This template is a guideline, not a strict requirement.

• Version: 2.6.0
• Integration: sbt scalafmtAll via terminal
• Configuration:

version = 2.6.0
align = more
maxColumn = 120
docstrings = ScalaDoc
align.openParenCallSite = true
align.openParenDefnSite = true
align.tokens = [
  {code = "=>", owner = "Case"},
  {code = "%", owner = "Term.ApplyInfix"},
  {code = "%%", owner = "Term.ApplyInfix"}
]
newlines.alwaysBeforeTopLevelStatements = true
rewrite.rules = [PreferCurlyFors, SortImports]
optIn.breakChainOnFirstMethodDot = false

Steps

Given code like this:

class Test {

  val testCases = List(
    ("Old state", "Campaign data", "Expected state"),
    (
      1,
      2,
      3
    )
  )
}

When I run scalafmt like this:

sbt scalafmtAll

Problem

Error is thrown:

[error] .../Test.scala:7: error: Unable to format file due to bug in scalafmt
[error]     (
[error]     ^: ...Test.scala

Expectation

I would like the code to be formatted

Workaround

I've found that by not letting single bracket to be on the line, the formatter will work. e.g.:

class Test {

  val testCases = List(
    ("Old state", "Campaign data", "Expected state"),
    (1, 2, 3)
  )
}

Notes

Used org.scalameta:sbt-scalafmt_2.12:2.4.0 plugin version. Original code, on which scalafmt fails, is valid and compiles. With 2.5.3 it works fine