Fix completion for multi-line entries

We need to include the previously entered lines into the code
that we presentation compile.

Management of this state makes the interpret method non tail
recursive, so we could blow the default stack with a multi-line entry
of hundreds of lines. I think thats an acceptable limitation.

1 files changed, 3 insertions, 4 deletions

diff --git a/src/repl/scala/tools/nsc/interpreter/PresentationCompilation.scala b/src/repl/scala/tools/nsc/interpreter/PresentationCompilation.scala
index 81c4fb0b70..3a2177a4cb 100644
--- a/src/repl/scala/tools/nsc/interpreter/PresentationCompilation.scala
+++ b/src/repl/scala/tools/nsc/interpreter/PresentationCompilation.scala
@@ -28,10 +28,9 @@ trait PresentationCompilation {
       //
       // scala> 1
       // scala> .toInt
-      val line1 = if (Completion.looksLikeInvocation(line)) {
-        self.mostRecentVar + line
-      } else line
-
+      //
+      // and for multi-line input.
+      val line1 = partialInput + (if (Completion.looksLikeInvocation(line)) { self.mostRecentVar + line } else line)
       val compiler = newPresentationCompiler()
       val trees = compiler.newUnitParser(line1).parseStats()
       val importer = global.mkImporter(compiler)