diff --git a/pkg/analyzer/lib/src/summary2/linked_unit_context.dart b/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
index 2abe4c3..320f151 100644
--- a/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
+++ b/pkg/analyzer/lib/src/summary2/linked_unit_context.dart
@@ -92,7 +92,12 @@
   CompilationUnit get unit_withDeclarations {
     if (_unit == null) {
       _unit = _astReader.readNode(data.node);
-      _unit.lineInfo = LineInfo(data.lineStarts);
+
+      var lineStarts = data.lineStarts;
+      if (lineStarts.isEmpty) {
+        lineStarts = [0];
+      }
+      _unit.lineInfo = LineInfo(lineStarts);
     }
     return _unit;
   }