Reproduce match error while emitting ColdScalacBenchmark.

Stack
```
[error] Error while emitting ColdDotcBenchmark.scala
[error] Block(List(ValDef(warmups$1,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$2)), ValDef(jvm$1,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$3)), ValDef(jvmArgs$1,TypeTree[RefinedType(TypeRef(ThisType(TypeRef(NoPrefix,scala)),Array), scala$Array$$T, TypeAlias(TypeRef(ThisType(TypeRef(NoPrefix,lang)),String), 0))],Apply(Apply(TypeApply(Select(Ident(Array),apply),List(TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))])),List(SeqLiteral(List(Literal(Constant(-XX:CICompilerCount=2))),TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))]))),List(Apply(TypeApply(Select(Ident(ClassTag),apply),List(TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))])),List(Literal(Constant(TypeRef(ThisType(TypeRef(NoPrefix,lang)),String)))))))), ValDef(jvmArgsPrepend$1,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$5))),Apply(Select(New(TypeTree[TypeRef(TermRef(TermRef(TermRef(TermRef(ThisType(TypeRef(NoPrefix,<root>)),org)/withSig(Signature(List(),)),openjdk)/withSig(Signature(List(),)),jmh)/withSig(Signature(List(),)),annotations)/withSig(Signature(List(),)),Fork)]),<init>),List(Literal(Constant(16)), Select(This(Ident(ColdDotcBenchmark)),warmups$1), Select(This(Ident(ColdDotcBenchmark)),jvm$1), Select(This(Ident(ColdDotcBenchmark)),jvmArgs$1), Select(This(Ident(ColdDotcBenchmark)),jvmArgsPrepend$1), Select(Ident(Fork),$lessinit$greater$default$6)))) (of class dotty.tools.dotc.ast.Trees$Block)
scala.MatchError: Block(List(ValDef(warmups$3,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$2)), ValDef(jvm$3,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$3)), ValDef(jvmArgs$3,TypeTree[RefinedType(TypeRef(ThisType(TypeRef(NoPrefix,scala)),Array), scala$Array$$T, TypeAlias(TypeRef(ThisType(TypeRef(NoPrefix,lang)),String), 0))],Apply(Apply(TypeApply(Select(Ident(Array),apply),List(TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))])),List(SeqLiteral(List(Literal(Constant(-XX:CICompilerCount=2))),TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))]))),List(Apply(TypeApply(Select(Ident(ClassTag),apply),List(TypeTree[TypeVar(ParamRef(scala$Array$apply$$T) -> TypeRef(ThisType(TypeRef(NoPrefix,lang)),String))])),List(Literal(Constant(TypeRef(ThisType(TypeRef(NoPrefix,lang)),String)))))))), ValDef(jvmArgsPrepend$3,TypeTree[TypeRef(ThisType(TypeRef(NoPrefix,scala)),Nothing)],Select(Ident(Fork),$lessinit$greater$default$5))),Apply(Select(New(TypeTree[TypeRef(TermRef(TermRef(TermRef(TermRef(ThisType(TypeRef(NoPrefix,<root>)),org)/withSig(Signature(List(),)),openjdk)/withSig(Signature(List(),)),jmh)/withSig(Signature(List(),)),annotations)/withSig(Signature(List(),)),Fork)]),<init>),List(Literal(Constant(16)), Select(This(Ident(ColdScalacBenchmark)),warmups$3), Select(This(Ident(ColdScalacBenchmark)),jvm$3), Select(This(Ident(ColdScalacBenchmark)),jvmArgs$3), Select(This(Ident(ColdScalacBenchmark)),jvmArgsPrepend$3), Select(Ident(Fork),$lessinit$greater$default$6)))) (of class dotty.tools.dotc.ast.Trees$Block)
    at dotty.tools.backend.jvm.DottyBackendInterface.assocsFromApply(DottyBackendInterface.scala:530)
    at dotty.tools.backend.jvm.DottyBackendInterface$$anon$10.assocs(DottyBackendInterface.scala:521)
    at dotty.tools.backend.jvm.DottyBackendInterface.emitAnnotations$$anonfun$6(DottyBackendInterface.scala:306)
```

Author: olafurpg

build.sbt

@@ -41,9 +41,14 @@ lazy val latestScalacVersion = sys.props.getOrElse(
   }
 )
 
+lazy val isDottyVersion = Seq(
+    scalaVersion := "0.1.1-bin-20170530-f8f52cc-NIGHTLY"
+)
+
 lazy val infrastructure = project
   .enablePlugins(JmhPlugin)
   .settings(
+    isDottyVersion,
     typesafeArtifactoryResolver,
     description := "Infrastrucuture to persist benchmark results annotated with metadata from Git",
     crossPaths := false,
@@ -78,7 +83,7 @@ lazy val scalacRuntime = project
 lazy val compilation = project
   .enablePlugins(JmhPlugin)
   .settings(
-    scalaVersion := "2.11.11",
+    isDottyVersion,
     ivyScala := ivyScala.value map { _.copy(overrideScalaVersion = true) },
     description := "Black box benchmark of the compilers",
     fork in run := true,