Merge pull request #54 from zooba/issue42

#42 Azure remote debugging - breaking doesn't work
microsoft · Apr 27, 2015 · c0d6891 · c0d6891
2 parents 295ba24 + c6dd077
commit c0d6891
Showing 1 changed file with 13 additions and 5 deletions.
diff --git a/Python/Product/Debugger/Debugger/PythonProcess.cs b/Python/Product/Debugger/Debugger/PythonProcess.cs
@@ -506,16 +506,24 @@ public PythonProcess(PythonLanguageVersion languageVersion, string exe, string a
         internal PythonAst GetAst(string filename) {
             PythonAst ast;
             lock (_astCacheLock) {
-                _astCache.TryGetValue(filename, out ast);
+                if (_astCache.TryGetValue(filename, out ast)) {
+                    return ast;
+                }
             }
 
-            if (ast == null) {
+            try {
                 using (var source = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read)) {
                     ast = Parser.CreateParser(source, LanguageVersion).ParseFile();
-                    lock (_astCacheLock) {
-                        _astCache[filename] = ast;
-                    }
                 }
+            } catch (ArgumentException) {
+            } catch (IOException) {
+            } catch (UnauthorizedAccessException) {
+            } catch (NotSupportedException) {
+            } catch (System.Security.SecurityException) {
+            }
+
+            lock (_astCacheLock) {
+                _astCache[filename] = ast;
             }
 
             return ast;