Report an error on Dart Source reading exception.

pkg/analyzer/lib/src/generated/engine.dart

Index: pkg/analyzer/lib/src/generated/engine.dart
diff --git a/pkg/analyzer/lib/src/generated/engine.dart b/pkg/analyzer/lib/src/generated/engine.dart
index abac83f3badd07d75f466e6cb2b971ffc1f11dd6..3ee660d93f2cc45b61a6816cc6221ae9b1ac4c1a 100644
--- a/pkg/analyzer/lib/src/generated/engine.dart
+++ b/pkg/analyzer/lib/src/generated/engine.dart
@@ -4684,6 +4684,16 @@ class AnalysisContextImpl implements InternalAnalysisContext {
     CaughtException thrownException = task.exception;
     if (thrownException != null) {
       sourceEntry.recordContentError(thrownException);
+      // TODO(scheglov) should we add separate ContentErrorCode and
+      // SourceEntry.CONTENT_ERRORS entry?
+      if (sourceEntry is DartEntry) {

[Brian Wilkerson, 2015/02/11 00:49:09]

We probably shouldn't limit this to only Dart files, but we can address that
later.

+        sourceEntry.setValue(
+            DartEntry.SCAN_ERRORS,
+            <AnalysisError>[
+                new AnalysisError.con1(source, ScannerErrorCode.UNABLE_GET_CONTENT)]);

[scheglov, 2015/02/10 23:26:14]

Would it be better to create the error in GetContentTask?

[Brian Wilkerson, 2015/02/11 00:49:10]

Probably, but we might want to wait for the task model.

+        ChangeNoticeImpl notice = _getNotice(source);
+        notice.setErrors(sourceEntry.allErrors, null);
+      }
       _workManager.remove(source);
       throw new AnalysisException('<rethrow>', thrownException);
     }