diff --git a/editor/microbit/emitter.ts b/editor/microbit/emitter.ts
index 5cf894a5..fa56e8f9 100644
--- a/editor/microbit/emitter.ts
+++ b/editor/microbit/emitter.ts
@@ -74,3 +74,5 @@ module TDev {
     }
   }
 }
+
+// vim: set ts=2 sw=2 sts=2:
diff --git a/editor/microbit/helpers.ts b/editor/microbit/helpers.ts
index 9fe62c00..273d4039 100644
--- a/editor/microbit/helpers.ts
+++ b/editor/microbit/helpers.ts
@@ -71,3 +71,5 @@ module TDev {
     }
   }
 }
+
+// vim: set ts=2 sw=2 sts=2:
diff --git a/editor/microbit/lambda_lifter.ts b/editor/microbit/lambda_lifter.ts
index ecabd999..c6bfd36b 100644
--- a/editor/microbit/lambda_lifter.ts
+++ b/editor/microbit/lambda_lifter.ts
@@ -23,8 +23,26 @@ module TDev {
         return as;
       }
 
+      // [InlineActions] are just at the level of statements.
+      public visitExpr(env, e: J.JNode) {
+        return [];
+      }
+
+      public visitExprStmt(env, expr) {
+          return [];
+      }
+
       public visitInlineActions(env, e: J.JExpr, actions: J.JInlineAction[]) {
-        return this.visitMany(e, actions).concat(actions);
+        // No need to visit [e], as expressions do not contain [JInlineActions].
+        return this.visitMany(env, actions).concat(actions);
+      }
+
+      public visitInlineAction(env, r, i, o, body: J.JStmt[]) {
+        return this.visitMany(env, body);
+      }
+
+      public visitWhile(env, cond, body: J.JStmt[]) {
+          return this.visitMany(env, body);
       }
 
       public visitAction(
@@ -37,6 +55,10 @@ module TDev {
         return this.visitMany(env, body);
       }
 
+      public visitLibrary(env, name) {
+        return [];
+      }
+
       public visitApp(e, decls: J.JDecl[]) {
         return this.visitMany(e, decls);
       }
@@ -68,3 +90,5 @@ module TDev {
     }
   }
 }
+
+// vim: set ts=2 sw=2 sts=2:
diff --git a/editor/microbit/main.ts b/editor/microbit/main.ts
index e52ad212..530466e9 100644
--- a/editor/microbit/main.ts
+++ b/editor/microbit/main.ts
@@ -1,12 +1,14 @@
 ///<reference path='../refs.ts'/>
 
 module TDev {
-    import J = AST.Json
+  import J = AST.Json
 
-    export module Microbit {
-        export function compile(a: J.JApp): string {
-            lift(a);
-            return (new Emitter()).visit(emptyEnv, a);
-        }
+  export module Microbit {
+    export function compile(a: J.JApp): string {
+      lift(a);
+      return (new Emitter()).visit(emptyEnv, a);
     }
+  }
 }
+
+// vim: set ts=2 sw=2 sts=2:
diff --git a/editor/microbit/visitor.ts b/editor/microbit/visitor.ts
index 5ec5ce36..9b7f0b3c 100644
--- a/editor/microbit/visitor.ts
+++ b/editor/microbit/visitor.ts
@@ -55,7 +55,10 @@ module TDev {
               return this.visitAction(env, n7.name, n7.inParameters, n7.outParameters, n7.body);
             case "app":
               return this.visitApp(env, (<J.JApp> n).decls);
+            case "library":
+              return this.visitLibrary(env, (<J.JLibrary> n).scriptName);
           }
+          throw "Unsupported node: "+n.nodeType;
       }
 
       public visitNumberLiteral(env: T, v: number): U                     { throw "Not implemented"; }
@@ -101,7 +104,10 @@ module TDev {
         outParams: J.JLocalDef[],
         body: J.JStmt[]): U                                                 { throw "Not implemented"; }
       public visitApp(env: T, decls: J.JDecl[]): U                        { throw "Not implemented"; }
+      public visitLibrary(env: T, name: string): U                        { throw "Not implemented"; }
     }
   }
 
 }
+
+// vim: set ts=2 sw=2 sts=2:
diff --git a/editor/refs.ts b/editor/refs.ts
index 6333dbf9..51e91786 100644
--- a/editor/refs.ts
+++ b/editor/refs.ts
@@ -52,8 +52,8 @@
 ///<reference path='../intellitrain/features.ts'/>
 ///<reference path='../intellitrain/output.ts'/>
 ///<reference path='../intellitrain/tokenize.ts'/>
+///<reference path='microbit/helpers.ts'/>
 ///<reference path='microbit/main.ts'/>
 ///<reference path='microbit/visitor.ts'/>
 ///<reference path='microbit/emitter.ts'/>
-///<reference path='microbit/helpers.ts'/>
 ///<reference path='microbit/lambda_lifter.ts'/>