[2.x] Fix lazy val name handling in Eval (#8818) (#8852)

Co-authored-by: kenji yoshida <6b656e6a69@gmail.com>

buildfile/src/main/scala/sbt/internal/Eval.scala

@@ -19,6 +19,7 @@ import java.nio.file.{ Files, Path, Paths, StandardOpenOption }
 import java.security.MessageDigest
 import scala.jdk.CollectionConverters.*
 import scala.quoted.*
+import scala.reflect.NameTransformer
 import sbt.io.{ Hash, IO }
 
 /**
@@ -429,8 +430,9 @@ object Eval:
           vals ::= name.mangledString
         case tpd.ValDef(name, tpt, _) if name.is(NameKinds.LazyLocalName) =>
           val str = name.mangledString
-          val methodName = str.take(str.indexOf("$lzy"))
-          val m = tree.symbol.owner.requiredMethod(methodName.replace("$minus", "-"))
+          val methodName = str.take(str.indexOf(NameTransformer.LAZY_LOCAL_SUFFIX_STRING))
+          val decodedName = NameTransformer.decode(methodName)
+          val m = tree.symbol.owner.requiredMethod(decodedName)
           if isAcceptableType(m.info) then vals ::= methodName
         case t: tpd.Template   => this((), t.body)
         case t: tpd.PackageDef => this((), t.stats)

sbt-app/src/sbt-test/project-load/lazy-val-name/build.sbt

@@ -0,0 +1,13 @@
+lazy val `a + b` = "2.13.18"
+
+// https://github.com/scala/scala3/blob/3.8.2/library/src/scala/reflect/NameTransformer.scala#L47-L64
+lazy val ~=<>!#%^&|*/+-:\\?@ = "my-name"
+
+scalaVersion := `a + b`
+
+name := ~=<>!#%^&|*/+-:\\?@
+
+InputKey[Unit]("check") := {
+  assert(scalaVersion.value == "2.13.18")
+  assert(name.value == "my-name")
+}

sbt-app/src/sbt-test/project-load/lazy-val-name/test

@@ -0,0 +1,2 @@
+> compile
+> check