Ignore files that are hidden by generated files.

pkg/analyzer/lib/src/dart/analysis/driver.dart

Index: pkg/analyzer/lib/src/dart/analysis/driver.dart
diff --git a/pkg/analyzer/lib/src/dart/analysis/driver.dart b/pkg/analyzer/lib/src/dart/analysis/driver.dart
index 18c81243be454aa0f1e87a4cfed6a274ebf86e1d..69c5f15ef25933243903da88ab5afa99f0e78205 100644
--- a/pkg/analyzer/lib/src/dart/analysis/driver.dart
+++ b/pkg/analyzer/lib/src/dart/analysis/driver.dart
@@ -74,7 +74,7 @@ class AnalysisDriver {
   /**
    * The version of data format, should be incremented on every format change.
    */
-  static const int DATA_VERSION = 13;
+  static const int DATA_VERSION = 14;
 
   /**
    * The name of the driver, e.g. the name of the folder.
@@ -632,6 +632,10 @@ class AnalysisDriver {
    */
   AnalysisResult _computeAnalysisResult(String path,
       {bool withUnit: false, bool asIsIfPartWithoutLibrary: false}) {
+    if (!_fsState.hasUri(path)) {
+      throw new StateError('The file $path has no URI.');
+    }
+
     /**
      * If the [file] is a library, return the [file] itself.
      * If the [file] is a part, return a library it is known to be a part of.
@@ -940,13 +944,20 @@ class AnalysisDriver {
     if (_requestedFiles.isNotEmpty) {
       String path = _requestedFiles.keys.first;
       try {
-        AnalysisResult result = _computeAnalysisResult(path, withUnit: true);
-        // If a part without a library, delay its analysis.
-        if (result == null) {
-          _requestedParts
-              .putIfAbsent(path, () => [])
-              .addAll(_requestedFiles.remove(path));
-          return;
+        AnalysisResult result;
+        if (_fsState.hasUri(path)) {
+          result = _computeAnalysisResult(path, withUnit: true);
+          // If a part without a library, delay its analysis.
+          if (result == null) {
+            _requestedParts
+                .putIfAbsent(path, () => [])
+                .addAll(_requestedFiles.remove(path));
+            return;
+          }
+          // Produce the result.
+          _resultController.add(result);
+        } else {
+          result = null;
         }
         // Notify the completers.
         _requestedFiles.remove(path).forEach((completer) {
@@ -954,7 +965,6 @@ class AnalysisDriver {
         });
         // Remove from to be analyzed and produce it now.
         _filesToAnalyze.remove(path);
-        _resultController.add(result);
       } catch (exception, stackTrace) {
         _filesToAnalyze.remove(path);
         _requestedFiles.remove(path).forEach((completer) {
@@ -1008,16 +1018,18 @@ class AnalysisDriver {
     if (_priorityFiles.isNotEmpty) {
       for (String path in _priorityFiles) {
         if (_filesToAnalyze.remove(path)) {
-          try {
-            AnalysisResult result =
-                _computeAnalysisResult(path, withUnit: true);
-            if (result == null) {
-              _partsToAnalyze.add(path);
-            } else {
-              _resultController.add(result);
+          if (_fsState.hasUri(path)) {
+            try {
+              AnalysisResult result =
+                  _computeAnalysisResult(path, withUnit: true);
+              if (result == null) {
+                _partsToAnalyze.add(path);
+              } else {
+                _resultController.add(result);
+              }
+            } catch (exception, stackTrace) {
+              _reportError(path, exception, stackTrace);
             }
-          } catch (exception, stackTrace) {
-            _reportError(path, exception, stackTrace);
           }
           return;
         }
@@ -1027,15 +1039,17 @@ class AnalysisDriver {
     // Analyze a general file.
     if (_filesToAnalyze.isNotEmpty) {
       String path = _removeFirst(_filesToAnalyze);
-      try {
-        AnalysisResult result = _computeAnalysisResult(path, withUnit: false);
-        if (result == null) {
-          _partsToAnalyze.add(path);
-        } else {
-          _resultController.add(result);
+      if (_fsState.hasUri(path)) {
+        try {
+          AnalysisResult result = _computeAnalysisResult(path, withUnit: false);
+          if (result == null) {
+            _partsToAnalyze.add(path);
+          } else {
+            _resultController.add(result);
+          }
+        } catch (exception, stackTrace) {
+          _reportError(path, exception, stackTrace);
         }
-      } catch (exception, stackTrace) {
-        _reportError(path, exception, stackTrace);
       }
       return;
     }