Add two pending tests for sbt/sbt#1237

Add two scripted tests that illustrate a problem occurring with Scala 2.11-RC3
where some macros have themselves attached as original tree, which causes a
stack overflow during dependency extraction.

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/macro-client/Client.scala

@@ -0,0 +1,5 @@
+package macros
+
+object Client {
+	Provider.printTree(Foo.str)
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/macro-client/Foo.scala

@@ -0,0 +1,5 @@
+package macros
+
+object Foo {
+  def str: String = "abc"
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/macro-client/changes/Foo.scala

@@ -0,0 +1,3 @@
+package macros
+object Foo {
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/macro-provider/Provider.scala

@@ -0,0 +1,12 @@
+package macros
+import scala.language.experimental.macros
+import scala.reflect.macros._
+
+object Provider {
+	def printTree(arg: Any) = macro printTreeImpl
+	def printTreeImpl(c: Context)(arg: c.Expr[Any]): c.Expr[String] = {
+	  val argStr = arg.tree.toString
+	  val literalStr = c.universe.Literal(c.universe.Constant(argStr))
+	  c.Expr[String](literalStr)
+	}
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/pending

@@ -0,0 +1,12 @@
+> compile
+
+# remove `Foo.str` which is an argument to a macro
+$ copy-file macro-client/changes/Foo.scala macro-client/Foo.scala
+
+# we should recompile Foo.scala first and then fail to compile Client.scala due to missing
+# `Foo.str`
+-> macro-client/compile
+
+> clean
+
+-> compile

sbt/src/sbt-test/source-dependencies/macro-arg-dep-2-11/project/build.scala

@@ -0,0 +1,30 @@
+import sbt._
+import Keys._
+
+object build extends Build {
+	val defaultSettings = Seq(
+		libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-reflect" % _ ),
+		incOptions := incOptions.value.withNameHashing(true),
+		scalaVersion := "2.11.0-RC3"
+	)
+
+	lazy val root = Project(
+	   base = file("."),
+	   id = "macro",
+	   aggregate = Seq(macroProvider, macroClient),
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+
+	lazy val macroProvider = Project(
+	   base = file("macro-provider"),
+	   id = "macro-provider",
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+
+	lazy val macroClient = Project(
+	   base = file("macro-client"),
+	   id = "macro-client",
+	   dependencies = Seq(macroProvider),
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/macro-client/Client.scala

@@ -0,0 +1,5 @@
+package macros
+
+object Client {
+	Provider.printTree(Provider.printTree(Foo.str))
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/macro-client/Foo.scala

@@ -0,0 +1,5 @@
+package macros
+
+object Foo {
+  def str: String = "abc"
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/macro-client/changes/Foo.scala

@@ -0,0 +1,3 @@
+package macros
+object Foo {
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/macro-provider/Provider.scala

@@ -0,0 +1,12 @@
+package macros
+import scala.language.experimental.macros
+import scala.reflect.macros._
+
+object Provider {
+	def printTree(arg: Any) = macro printTreeImpl
+	def printTreeImpl(c: Context)(arg: c.Expr[Any]): c.Expr[String] = {
+	  val argStr = arg.tree.toString
+	  val literalStr = c.universe.Literal(c.universe.Constant(argStr))
+	  c.Expr[String](literalStr)
+	}
+}

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/pending

@@ -0,0 +1,13 @@
+> compile
+
+# remove `Foo.str` which is an argument to a macro
+# (this macro itself that is an argument to another macro)
+$ copy-file macro-client/changes/Foo.scala macro-client/Foo.scala
+
+# we should recompile Foo.scala first and then fail to compile Client.scala due to missing
+# `Foo.str`
+-> macro-client/compile
+
+> clean
+
+-> compile

sbt/src/sbt-test/source-dependencies/macro-arg-dep-nested-2-11/project/build.scala

@@ -0,0 +1,30 @@
+import sbt._
+import Keys._
+
+object build extends Build {
+	val defaultSettings = Seq(
+		libraryDependencies <+= scalaVersion("org.scala-lang" % "scala-reflect" % _ ),
+		incOptions := incOptions.value.withNameHashing(true),
+		scalaVersion := "2.11.0-RC3"
+	)
+
+	lazy val root = Project(
+	   base = file("."),
+	   id = "macro",
+	   aggregate = Seq(macroProvider, macroClient),
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+
+	lazy val macroProvider = Project(
+	   base = file("macro-provider"),
+	   id = "macro-provider",
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+
+	lazy val macroClient = Project(
+	   base = file("macro-client"),
+	   id = "macro-client",
+	   dependencies = Seq(macroProvider),
+	   settings = Defaults.defaultSettings ++ defaultSettings
+	)
+}