generate incorrect value since 0.13.0

[xuwei-k]

project/build.properties

sbt.version=1.10.5

build.sbt

lazy val a1 = project.settings(scalaVersion := "2.13.15")

lazy val a2 = project.settings(scalaVersion := "3.3.4")

lazy val a3 = project
  .enablePlugins(BuildInfoPlugin)
  .settings(
    Compile / buildInfoKeys := List[BuildInfoKey](
      BuildInfoKey.map(a1 / scalaVersion)("scalaVersion_a1" -> _._2),
      BuildInfoKey.map(a2 / scalaVersion)("scalaVersion_a2" -> _._2),
    )
  )

a3/target/scala-2.12/src_managed/main/sbt-buildinfo/BuildInfo.scala

sbt-buildinfo 0.12.0

// $COVERAGE-OFF$
package buildinfo

/** This object was generated by sbt-buildinfo. */
case object BuildInfo {
  /** The value is "2.13.15". */
  val scalaVersion_a1: String = "2.13.15"
  /** The value is "3.3.4". */
  val scalaVersion_a2: String = "3.3.4"
  override val toString: String = {
    "scalaVersion_a1: %s, scalaVersion_a2: %s".format(
      scalaVersion_a1, scalaVersion_a2
    )
  }
}
// $COVERAGE-ON$

sbt-buildinfo 0.13.0

// $COVERAGE-OFF$
package buildinfo

/** This object was generated by sbt-buildinfo. */
case object BuildInfo {
  /** The value is "2.12.20". */
  val scalaVersion_a1: String = "2.12.20"
  /** The value is "2.12.20". */
  val scalaVersion_a2: String = "2.12.20"
  override val toString: String = {
    "scalaVersion_a1: %s, scalaVersion_a2: %s".format(
      scalaVersion_a1, scalaVersion_a2
    )
  }
}
// $COVERAGE-ON$

[eed3si9n]

Thank for the report!