Merge pull request #1408 from zooba/entry-race

Fixes race condition from unloading files before clearing local information

Author: zooba

Python/Product/Analyzer/Intellisense/AnalysisProtocol.cs

@@ -18,6 +18,7 @@
 using System.Collections.Generic;
 using System.Reflection;
 using Microsoft.PythonTools.Analysis;
+using Microsoft.PythonTools.Infrastructure;
 using Microsoft.PythonTools.Interpreter;
 using Microsoft.PythonTools.Ipc.Json;
 using Microsoft.PythonTools.Parsing;
@@ -310,6 +311,8 @@ public sealed class UnloadFileRequest : Request<Response> {
 
             public int fileId;
             public override string command => Command;
+
+            public override string ToString() => "{0}:{1}".FormatUI(command, fileId);
         }
 
 
@@ -329,6 +332,8 @@ public sealed class FileUpdateRequest : Request<FileUpdateResponse> {
             public FileUpdate[] updates;
 
             public override string command => Command;
+
+            public override string ToString() => "{0}:{1} ({2} updates)".FormatUI(command, fileId, updates.Length);
         }
 
         public enum FileUpdateKind {

Python/Product/Ipc.Json/Request.cs

@@ -24,6 +24,8 @@ namespace Microsoft.PythonTools.Ipc.Json {
     public class Request {
         [JsonIgnore]
         public virtual string command => null;
+
+        public override string ToString() => command;
     }
 
     public class GenericRequest : Request<Response> {

Python/Product/PythonTools/PythonTools/Intellisense/ProjectAnalyzer.cs

@@ -1339,14 +1339,15 @@ internal async Task StopAnalyzingDirectoryAsync(string directory) {
 
         internal async Task UnloadFileAsync(AnalysisEntry entry) {
             _analysisComplete = false;
-            await SendRequestAsync(new AP.UnloadFileRequest() { fileId = entry.FileId }).ConfigureAwait(false);
             AnalysisEntry removed;
             _projectFiles.TryRemove(entry.Path, out removed);
             _projectFilesById.TryRemove(entry.FileId, out removed);
 
             _errorProvider.Clear(entry, ParserTaskMoniker);
             _errorProvider.Clear(entry, UnresolvedImportMoniker);
             _commentTaskProvider.Clear(entry, ParserTaskMoniker);
+
+            await SendRequestAsync(new AP.UnloadFileRequest() { fileId = entry.FileId }).ConfigureAwait(false);
         }
 
         internal void ClearAllTasks() {
@@ -1380,7 +1381,7 @@ private void OnShouldWarnOnLaunchChanged(AnalysisEntry entry) {
             if (conn == null) {
                 return default(T);
             }
-            Debug.WriteLine(String.Format("{1} Sending request {0}", request.command, DateTime.Now));
+            Debug.WriteLine(String.Format("{1} Sending request {0}", request, DateTime.Now));
             T res = defaultValue;
             try {
                 res = await conn.SendRequestAsync(request, _processExitedCancelSource.Token).ConfigureAwait(false);
@@ -1391,7 +1392,7 @@ private void OnShouldWarnOnLaunchChanged(AnalysisEntry entry) {
             } catch (FailedRequestException e) {
                 _pyService.Logger.LogEvent(Logging.PythonLogEvent.AnalysisOpertionFailed, e.Message);
             }
-            Debug.WriteLine(String.Format("{1} Done sending request {0}", request.command, DateTime.Now));
+            Debug.WriteLine(String.Format("{1} Done sending request {0}", request, DateTime.Now));
             return res;
         }