Failsafe for unavailable project info (sdk#24947).

See: dart-lang/sdk#24947

[email protected]

Review URL: https://codereview.chromium.org//1447123002 .

Author: pq

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 0.1.6
+
+* Fix to `package_prefixed_library_names` (dart-lang/sdk#24947; #154).
+
 # 0.1.5
 
 * Added `prefer_is_not_empty` lint rule (#143).

lib/src/rules/package_prefixed_library_names.dart

@@ -80,6 +80,11 @@ class Visitor extends SimpleAstVisitor {
 
   @override
   visitLibraryDirective(LibraryDirective node) {
+    // If no project info is set, bail early.
+    // https://github.com/dart-lang/linter/issues/154
+    if (project == null) {
+      return;
+    }
     Source source = node.element.source;
     var prefix = createLibraryNamePrefix(
         libraryPath: source.fullName,

pubspec.yaml

@@ -1,5 +1,5 @@
 name: linter
-version: 0.1.5
+version: 0.1.6
 author: Dart Team <[email protected]>
 description: Style linter for Dart.
 homepage: https://github.com/dart-lang/linter