Project doesn't serialize non-modified buffers that don't exist on disk

spec/project-spec.coffee

@@ -26,6 +26,18 @@ describe "Project", ->
       expect(deserializedProject.getBuffers().length).toBe 0
       expect(atom.project.getBuffers().length).toBe 0
 
+    it "destroys non-existent non-modified buffers and does not include them in the serialized state", ->
+      nonExistentNonModified = atom.project.openSync("non-existent-non-modified.txt")
+      nonExistentModified = atom.project.openSync("non-existent-modified.txt")
+      nonExistentModified.setText("I am modified")
+      expect(atom.project.getBuffers().length).toBe 2
+
+      atom.project.getState().serializeForPersistence()
+      deserializedProject = atom.replicate().get('project')
+
+      expect(deserializedProject.getBuffers().length).toBe 1
+      expect(atom.project.getBuffers().length).toBe 1
+
     it "listens for destroyed events on deserialized buffers and removes them when they are destroyed", ->
       atom.project.openSync('a')
       expect(atom.project.getBuffers().length).toBe 1

src/project.coffee

@@ -43,6 +43,7 @@ class Project extends telepath.Model
   # Private: Called by telepath.
   beforePersistence: ->
     @destroyUnretainedBuffers()
+    @destroyNonExistentNonModified()
 
   # Public: Register an opener for project files.
   #
@@ -77,6 +78,9 @@ class Project extends telepath.Model
   destroyUnretainedBuffers: ->
     buffer.destroy() for buffer in @getBuffers() when not buffer.isRetained()
 
+  destroyNonExistentNonModified: ->
+    buffer.destroy() for buffer in @getBuffers() when not buffer.isModified() and not buffer.file.exists()
+
   # Public: Returns the {Git} repository if available.
   getRepo: -> @repo