Fixed race condition in project.GetOrCreateBehavior().

Avoid loading behaviors into UnknownProject/MissingProject.

src/AddIns/BackendBindings/Boo/BooBinding/Project/Src/BooProject.cs

@@ -131,13 +131,9 @@ namespace Grunwald.BooBinding
 			}
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new BooProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			BooProjectBehavior behavior = new BooProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/CSharpBinding/Project/Src/Project/CSharpProject.cs

@@ -149,13 +149,9 @@ namespace CSharpBinding
 		}
 		 */
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new CSharpProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			CSharpProjectBehavior behavior = new CSharpProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/CppBinding/CppBinding/Project/CppProject.cs

@@ -181,13 +181,10 @@ namespace ICSharpCode.CppBinding.Project
 			}
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new CppProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
+		}
-			CppProjectBehavior behavior = new CppProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;		}
 	}
 	
 	public class CppProjectBehavior : ProjectBehavior

src/AddIns/BackendBindings/FSharpBinding/FSharpProject.cs

@@ -44,13 +44,9 @@ namespace FSharpBinding
 			}
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new FSharpProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			FSharpProjectBehavior behavior = new FSharpProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/Python/PythonBinding/Project/Src/PythonProject.cs

@@ -53,13 +53,9 @@ namespace ICSharpCode.PythonBinding
 			get { return GetProperty(null, null, "MainFile") != null; }
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new PythonProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			PythonProjectBehavior behavior = new PythonProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/Ruby/RubyBinding/Project/Src/RubyProject.cs

@@ -49,13 +49,9 @@ namespace ICSharpCode.RubyBinding
 			get { return GetProperty(null, null, "MainFile") != null; }
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new RubyProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			RubyProjectBehavior behavior = new RubyProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/VBNetBinding/Project/Src/Project/VBNetProject.cs

@@ -185,13 +185,9 @@ namespace ICSharpCode.VBNetBinding
 			return "On".Equals(val, StringComparison.OrdinalIgnoreCase);
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new VBProjectBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			VBProjectBehavior behavior = new VBProjectBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/AddIns/BackendBindings/WixBinding/Project/Src/Project/WixProject.cs

@@ -216,13 +216,9 @@ namespace ICSharpCode.WixBinding
 			return new ReadOnlyCollection<WixExtensionProjectItem>(items);
 		}
 		
-		protected override ProjectBehavior GetOrCreateBehavior()
+		protected override ProjectBehavior CreateDefaultBehavior()
 		{
-			if (projectBehavior != null)
+			return new WixStartBehavior(this, base.CreateDefaultBehavior());
-				return projectBehavior;
-			WixStartBehavior behavior = new WixStartBehavior(this, new DotNetStartBehavior(this, new DefaultProjectBehavior(this)));
-			projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, behavior);
-			return projectBehavior;
 		}
 	}
 	

src/Main/Base/Project/Src/Project/AbstractProject.cs

@@ -591,9 +591,11 @@ namespace ICSharpCode.SharpDevelop.Project
 		
 		protected virtual ProjectBehavior GetOrCreateBehavior()
 		{
-			if (projectBehavior == null)
+			lock (SyncRoot) {
-				projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, CreateDefaultBehavior());
+				if (projectBehavior == null)
-			return projectBehavior;
+					projectBehavior = ProjectBehaviorService.LoadBehaviorsForProject(this, CreateDefaultBehavior());
+				return projectBehavior;
+			}
 		}
 	}
 }

src/Main/Base/Project/Src/Project/Behaviors/ProjectBehaviorSupportedConditionEvaluator.cs

@@ -39,6 +39,9 @@ namespace ICSharpCode.SharpDevelop.Project
 				string guid = ((MSBuildBasedProject)project).GetEvaluatedProperty("ProjectTypeGuids");
 				if (!string.IsNullOrEmpty(guid))
 					return guid;
+			} else if (project is UnknownProject || project is MissingProject) {
+				// don't return any GUID for projects that could not be loaded
+				return string.Empty;
 			}
 			
 			return project.TypeGuid;

src/Main/Base/Project/Src/Project/CompilableProject.cs

@@ -263,6 +263,11 @@ namespace ICSharpCode.SharpDevelop.Project
 			}
 		}
 		
+		protected override ProjectBehavior CreateDefaultBehavior()
+		{
+			return new DotNetStartBehavior(this, base.CreateDefaultBehavior());
+		}
+		
 		#region IUpgradableProject
 		[Browsable(false)]
 		public virtual bool UpgradeDesired {

src/Main/Base/Project/Src/Project/MissingProject.cs

@@ -20,5 +20,15 @@ namespace ICSharpCode.SharpDevelop.Project
 				return true;
 			}
 		}
+		
+		protected override ProjectBehavior GetOrCreateBehavior()
+		{
+			// don't add behaviors from AddIn-Tree to MissingProject
+			lock (SyncRoot) {
+				if (projectBehavior == null)
+					projectBehavior = new DefaultProjectBehavior(this);
+				return projectBehavior;
+			}
+		}
 	}
 }

src/Main/Base/Project/Src/Project/UnknownProject.cs

@@ -42,5 +42,15 @@ namespace ICSharpCode.SharpDevelop.Project
 			FileName = fileName;
 			TypeGuid = "{00000000-0000-0000-0000-000000000000}";
 		}
+		
+		protected override ProjectBehavior GetOrCreateBehavior()
+		{
+			// don't add behaviors from AddIn-Tree to UnknownProject
+			lock (SyncRoot) {
+				if (projectBehavior == null)
+					projectBehavior = new DefaultProjectBehavior(this);
+				return projectBehavior;
+			}
+		}
 	}
 }

src/Main/Base/Test/WebReferences/WebReferenceTestHelper.cs

@@ -47,7 +47,7 @@ namespace ICSharpCode.SharpDevelop.Tests.WebReferences
 				get { return ICSharpCode.SharpDevelop.Dom.LanguageProperties.CSharp; }
 			}
 			
-			protected override ProjectBehavior GetOrCreateBehavior()
+			protected override ProjectBehavior CreateDefaultBehavior()
 			{
 				return new DotNetStartBehavior(this, null);
 			}