diff --git a/pkg/analyzer/lib/error/error.dart b/pkg/analyzer/lib/error/error.dart
index 30ed3d0..0ef80e5 100644
--- a/pkg/analyzer/lib/error/error.dart
+++ b/pkg/analyzer/lib/error/error.dart
@@ -16,6 +16,7 @@
 import 'package:analyzer/src/generated/parser.dart' show ParserErrorCode;
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/manifest/manifest_warning_code.dart';
+import 'package:analyzer/src/pubspec/pubspec_warning_code.dart';
 
 export 'package:_fe_analyzer_shared/src/base/errors.dart'
     show ErrorCode, ErrorSeverity, ErrorType;
@@ -795,6 +796,9 @@
   ParserErrorCode.WITH_BEFORE_EXTENDS,
   ParserErrorCode.WRONG_SEPARATOR_FOR_POSITIONAL_PARAMETER,
   ParserErrorCode.WRONG_TERMINATOR_FOR_PARAMETER_GROUP,
+  PubspecWarningCode.INVALID_DEPENDENCY,
+  PubspecWarningCode.PATH_DOES_NOT_EXIST,
+  PubspecWarningCode.PATH_PUBSPEC_DOES_NOT_EXIST,
   ScannerErrorCode.EXPECTED_TOKEN,
   ScannerErrorCode.ILLEGAL_CHARACTER,
   ScannerErrorCode.MISSING_DIGIT,
diff --git a/pkg/analyzer/lib/src/dart/micro/libraries_log.dart b/pkg/analyzer/lib/src/dart/micro/libraries_log.dart
deleted file mode 100644
index a67988b..0000000
--- a/pkg/analyzer/lib/src/dart/micro/libraries_log.dart
+++ /dev/null
@@ -1,88 +0,0 @@
-// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-import 'package:meta/meta.dart';
-
-class ChangeFileLoadEntry extends LibrariesLogEntry {
-  /// The path of the file that was reported as changed.
-  final String target;
-
-  /// The files that depend transitively on the [target]. These files are
-  /// removed from the state, and from the element factory.
-  final List<LibrariesLogFile> removed = [];
-
-  ChangeFileLoadEntry._(this.target);
-
-  void addRemoved({
-    @required String path,
-    @required Uri uri,
-  }) {
-    removed.add(
-      LibrariesLogFile._(path, uri),
-    );
-  }
-
-  @override
-  String toString() {
-    return 'Change(target: $target, removed: $removed)';
-  }
-}
-
-class LibrariesLog {
-  final List<LibrariesLogEntry> entries = [];
-
-  ChangeFileLoadEntry changeFile(String path) {
-    var entry = ChangeFileLoadEntry._(path);
-    entries.add(entry);
-    return entry;
-  }
-
-  LoadLibrariesForTargetLogEntry loadForTarget({
-    @required String path,
-    @required Uri uri,
-  }) {
-    var entry = LoadLibrariesForTargetLogEntry._(
-      LibrariesLogFile._(path, uri),
-    );
-    entries.add(entry);
-    return entry;
-  }
-}
-
-abstract class LibrariesLogEntry {
-  final DateTime time = DateTime.now();
-}
-
-class LibrariesLogFile {
-  final String path;
-  final Uri uri;
-
-  LibrariesLogFile._(this.path, this.uri);
-
-  @override
-  String toString() {
-    return '(path: $path, uri: $uri)';
-  }
-}
-
-class LoadLibrariesForTargetLogEntry extends LibrariesLogEntry {
-  final LibrariesLogFile target;
-  final List<LibrariesLogFile> loaded = [];
-
-  LoadLibrariesForTargetLogEntry._(this.target);
-
-  void addLibrary({
-    @required String path,
-    @required Uri uri,
-  }) {
-    loaded.add(
-      LibrariesLogFile._(path, uri),
-    );
-  }
-
-  @override
-  String toString() {
-    return 'Load(target: $target, loaded: $loaded)';
-  }
-}
diff --git a/pkg/analyzer/lib/src/dart/micro/resolve_file.dart b/pkg/analyzer/lib/src/dart/micro/resolve_file.dart
index b77c5aa..b0e1808 100644
--- a/pkg/analyzer/lib/src/dart/micro/resolve_file.dart
+++ b/pkg/analyzer/lib/src/dart/micro/resolve_file.dart
@@ -20,7 +20,6 @@
 import 'package:analyzer/src/dart/analysis/results.dart';
 import 'package:analyzer/src/dart/micro/analysis_context.dart';
 import 'package:analyzer/src/dart/micro/cider_byte_store.dart';
-import 'package:analyzer/src/dart/micro/libraries_log.dart';
 import 'package:analyzer/src/dart/micro/library_analyzer.dart';
 import 'package:analyzer/src/dart/micro/library_graph.dart';
 import 'package:analyzer/src/exception/exception.dart';
@@ -76,13 +75,11 @@
 
   MicroContextObjects contextObjects;
 
-  final LibrariesLog _librariesLog = LibrariesLog();
-
   _LibraryContext libraryContext;
 
   /// List of ids for cache elements that are invalidated. Track elements that
-  /// are invalidated during [changeFile]. Used in [releaseAndClearRemovedIds] to
-  /// release the cache items and is then cleared.
+  /// are invalidated during [changeFile]. Used in [releaseAndClearRemovedIds]
+  /// to release the cache items and is then cleared.
   final Set<int> removedCacheIds = {};
 
   FileResolver(
@@ -124,10 +121,6 @@
     this.byteStore = byteStore;
   }
 
-  List<LibrariesLogEntry> get librariesLogEntries {
-    return _librariesLog.entries;
-  }
-
   /// Update the resolver to reflect the fact that the file with the given
   /// [path] was changed. We need to make sure that when this file, of any file
   /// that directly or indirectly referenced it, is resolved, we used the new
@@ -142,13 +135,8 @@
     var removedFiles = <FileState>[];
     fsState.changeFile(path, removedFiles);
 
-    // Update the log.
-    var logEntry = _librariesLog.changeFile(path);
+    // Schedule disposing references to cached unlinked data.
     for (var removedFile in removedFiles) {
-      logEntry.addRemoved(
-        path: removedFile.path,
-        uri: removedFile.uri,
-      );
       removedCacheIds.add(removedFile.id);
     }
 
@@ -474,7 +462,6 @@
         resourceProvider,
         byteStore,
         contextObjects,
-        _librariesLog,
       );
     }
   }
@@ -615,7 +602,6 @@
   final ResourceProvider resourceProvider;
   final CiderByteStore byteStore;
   final MicroContextObjects contextObjects;
-  final LibrariesLog librariesLog;
 
   LinkedElementFactory elementFactory;
 
@@ -626,7 +612,6 @@
     this.resourceProvider,
     this.byteStore,
     this.contextObjects,
-    this.librariesLog,
   ) {
     elementFactory = LinkedElementFactory(
       contextObjects.analysisContext,
@@ -646,21 +631,9 @@
     var librariesLinkedTimer = Stopwatch();
     var inputsTimer = Stopwatch();
 
-    var logEntry = librariesLog.loadForTarget(
-      path: targetLibrary.path,
-      uri: targetLibrary.uri,
-    );
-
     void loadBundle(LibraryCycle cycle) {
       if (!loadedBundles.add(cycle)) return;
 
-      for (var library in cycle.libraries) {
-        logEntry.addLibrary(
-          path: library.path,
-          uri: library.uri,
-        );
-      }
-
       performance.getDataInt('cycleCount').increment();
       performance.getDataInt('libraryCount').add(cycle.libraries.length);
 
diff --git a/pkg/analyzer/lib/src/pubspec/pubspec_validator.dart b/pkg/analyzer/lib/src/pubspec/pubspec_validator.dart
index 83c2031..af82bcf 100644
--- a/pkg/analyzer/lib/src/pubspec/pubspec_validator.dart
+++ b/pkg/analyzer/lib/src/pubspec/pubspec_validator.dart
@@ -8,6 +8,7 @@
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/pubspec/pubspec_warning_code.dart';
+import 'package:analyzer/src/util/yaml.dart';
 import 'package:path/path.dart' as path;
 import 'package:source_span/src/span.dart';
 import 'package:yaml/yaml.dart';
@@ -27,12 +28,21 @@
   /// configuration data.
   static const String FLUTTER_FIELD = 'flutter';
 
+  /// The name of the field whose value is a git dependency.
+  static const String GIT_FIELD = 'git';
+
   /// The name of the field whose value is the name of the package.
   static const String NAME_FIELD = 'name';
 
   /// The name of the field whose value is a path to a package dependency.
   static const String PATH_FIELD = 'path';
 
+  /// The name of the field whose value is the where to publish the package.
+  static const String PUBLISH_TO_FIELD = 'publish_to';
+
+  /// The name of the field whose value is the version of the package.
+  static const String VERSION_FIELD = 'version';
+
   /// The resource provider used to access the file system.
   final ResourceProvider provider;
 
@@ -89,6 +99,16 @@
     return false;
   }
 
+  String _asString(dynamic node) {
+    if (node is String) {
+      return node;
+    }
+    if (node is YamlScalar && node.value is String) {
+      return node.value as String;
+    }
+    return null;
+  }
+
   /// Return a map whose keys are the names of declared dependencies and whose
   /// values are the specifications of those dependencies. The map is extracted
   /// from the given [contents] using the given [key].
@@ -122,8 +142,17 @@
     Map<dynamic, YamlNode> declaredDevDependencies =
         _getDeclaredDependencies(reporter, contents, DEV_DEPENDENCIES_FIELD);
 
+    bool isPublishablePackage = false;
+    var version = contents[VERSION_FIELD];
+    if (version != null) {
+      var publishTo = _asString(contents[PUBLISH_TO_FIELD]);
+      if (publishTo != 'none') {
+        isPublishablePackage = true;
+      }
+    }
+
     for (var dependency in declaredDependencies.entries) {
-      _validatePathEntries(reporter, dependency.value);
+      _validatePathEntries(reporter, dependency.value, isPublishablePackage);
     }
 
     for (var dependency in declaredDevDependencies.entries) {
@@ -132,7 +161,7 @@
         _reportErrorForNode(reporter, packageName,
             PubspecWarningCode.UNNECESSARY_DEV_DEPENDENCY, [packageName.value]);
       }
-      _validatePathEntries(reporter, dependency.value);
+      _validatePathEntries(reporter, dependency.value, false);
     }
   }
 
@@ -209,33 +238,44 @@
   /// Valid paths are directories that:
   ///
   /// 1. exist,
-  /// 2. contain a pubspec.yaml file, and
-  /// 3. `lib` dir
-  void _validatePathEntries(ErrorReporter reporter, YamlNode dependency) {
+  /// 2. contain a pubspec.yaml file
+  ///
+  /// If [checkForPathAndGitDeps] is true, `git` or `path` dependencies will
+  /// be marked invalid.
+  void _validatePathEntries(ErrorReporter reporter, YamlNode dependency,
+      bool checkForPathAndGitDeps) {
     if (dependency is YamlMap) {
-      for (var node in dependency.nodes.entries) {
-        var pathEntry = dependency[PATH_FIELD];
-        if (pathEntry != null) {
-          var context = provider.pathContext;
-          var normalizedPath = context.joinAll(path.posix.split(pathEntry));
-          var packageRoot = context.dirname(source.fullName);
-          var dependencyPath = context.join(packageRoot, normalizedPath);
-          dependencyPath = context.absolute(dependencyPath);
-          dependencyPath = context.normalize(dependencyPath);
-          var packageFolder = provider.getFolder(dependencyPath);
-          if (!packageFolder.exists) {
-            _reportErrorForNode(reporter, node.value,
-                PubspecWarningCode.PATH_DOES_NOT_EXIST, [pathEntry]);
-          } else {
-            if (!packageFolder
-                .getChild(AnalysisEngine.PUBSPEC_YAML_FILE)
-                .exists) {
-              _reportErrorForNode(reporter, node.value,
-                  PubspecWarningCode.PATH_PUBSPEC_DOES_NOT_EXIST, [pathEntry]);
-            }
-            // todo (pq): test for presence of a lib dir.
+      var pathEntry = _asString(dependency[PATH_FIELD]);
+      if (pathEntry != null) {
+        YamlNode pathKey() => getKey(dependency, PATH_FIELD);
+        var context = provider.pathContext;
+        var normalizedPath = context.joinAll(path.posix.split(pathEntry));
+        var packageRoot = context.dirname(source.fullName);
+        var dependencyPath = context.join(packageRoot, normalizedPath);
+        dependencyPath = context.absolute(dependencyPath);
+        dependencyPath = context.normalize(dependencyPath);
+        var packageFolder = provider.getFolder(dependencyPath);
+        if (!packageFolder.exists) {
+          _reportErrorForNode(reporter, pathKey(),
+              PubspecWarningCode.PATH_DOES_NOT_EXIST, [pathEntry]);
+        } else {
+          if (!packageFolder
+              .getChild(AnalysisEngine.PUBSPEC_YAML_FILE)
+              .exists) {
+            _reportErrorForNode(reporter, pathKey(),
+                PubspecWarningCode.PATH_PUBSPEC_DOES_NOT_EXIST, [pathEntry]);
           }
         }
+        if (checkForPathAndGitDeps) {
+          _reportErrorForNode(reporter, pathKey(),
+              PubspecWarningCode.INVALID_DEPENDENCY, [PATH_FIELD]);
+        }
+      }
+
+      var gitEntry = dependency[GIT_FIELD];
+      if (gitEntry != null && checkForPathAndGitDeps) {
+        _reportErrorForNode(reporter, getKey(dependency, GIT_FIELD),
+            PubspecWarningCode.INVALID_DEPENDENCY, [GIT_FIELD]);
       }
     }
   }
diff --git a/pkg/analyzer/lib/src/pubspec/pubspec_warning_code.dart b/pkg/analyzer/lib/src/pubspec/pubspec_warning_code.dart
index ecc7124..a93cca0 100644
--- a/pkg/analyzer/lib/src/pubspec/pubspec_warning_code.dart
+++ b/pkg/analyzer/lib/src/pubspec/pubspec_warning_code.dart
@@ -52,6 +52,17 @@
       "The value of the 'flutter' field is expected to be a map.",
       correction: "Try converting the value to be a map.");
 
+  /// A code indicating that a versioned package has an invalid dependency (git
+  /// or path).
+  ///
+  /// Parameters:
+  /// 0: the kind of dependency.
+  static const PubspecWarningCode INVALID_DEPENDENCY = PubspecWarningCode(
+      'INVALID_DEPENDENCY', "Publishable packages can't have {0} dependencies.",
+      correction:
+          "Try adding a 'publish_to: none' entry to mark the package as not "
+          "for publishing or remove the {0} dependency.");
+
   /// A code indicating that the name field is missing.
   static const PubspecWarningCode MISSING_NAME = PubspecWarningCode(
       'MISSING_NAME', "The name field is required but missing.",
diff --git a/pkg/analyzer/test/src/dart/micro/simple_file_resolver_test.dart b/pkg/analyzer/test/src/dart/micro/simple_file_resolver_test.dart
index 327276b..549701d 100644
--- a/pkg/analyzer/test/src/dart/micro/simple_file_resolver_test.dart
+++ b/pkg/analyzer/test/src/dart/micro/simple_file_resolver_test.dart
@@ -3,7 +3,6 @@
 // BSD-style license that can be found in the LICENSE file.
 
 import 'package:analyzer/src/dart/error/syntactic_errors.dart';
-import 'package:analyzer/src/dart/micro/libraries_log.dart';
 import 'package:analyzer/src/error/codes.dart';
 import 'package:analyzer/src/lint/registry.dart';
 import 'package:matcher/matcher.dart';
@@ -25,10 +24,6 @@
   String bPath;
   String cPath;
 
-  String get _asyncLibraryPath => futureElement.library.source.fullName;
-
-  String get _coreLibraryPath => intElement.library.source.fullName;
-
   @override
   void setUp() {
     super.setUp();
@@ -37,57 +32,6 @@
     cPath = convertPath('/workspace/dart/test/lib/c.dart');
   }
 
-  test_changeFile_log() async {
-    newFile(aPath, content: r'''
-class A {}
-''');
-
-    newFile(bPath, content: r'''
-import 'a.dart';
-A a;
-B b;
-''');
-
-    result = await resolveFile(bPath);
-    assertErrorsInResolvedUnit(result, [
-      error(CompileTimeErrorCode.UNDEFINED_CLASS, 22, 1),
-    ]);
-
-    newFile(aPath, content: r'''
-class A {}
-class B {}
-''');
-    fileResolver.changeFile(aPath);
-
-    result = await resolveFile(bPath);
-    assertErrorsInResolvedUnit(result, []);
-
-    // The failure of this check will be reported badly.
-    expect(fileResolver.librariesLogEntries, [
-      predicate((LoadLibrariesForTargetLogEntry entry) {
-        expect(entry.target.path, bPath);
-        var loadedPathSet = entry.loaded.map((f) => f.path).toSet();
-        expect(loadedPathSet, contains(aPath));
-        expect(loadedPathSet, contains(bPath));
-        expect(loadedPathSet, contains(_asyncLibraryPath));
-        expect(loadedPathSet, contains(_coreLibraryPath));
-        return true;
-      }),
-      predicate((ChangeFileLoadEntry entry) {
-        expect(entry.target, aPath);
-        var removedPathSet = entry.removed.map((f) => f.path).toSet();
-        expect(removedPathSet, {aPath, bPath});
-        return true;
-      }),
-      predicate((LoadLibrariesForTargetLogEntry entry) {
-        expect(entry.target.path, bPath);
-        var loadedPathSet = entry.loaded.map((f) => f.path).toSet();
-        expect(loadedPathSet, {aPath, bPath});
-        return true;
-      }),
-    ]);
-  }
-
   test_changeFile_refreshedFiles() async {
     newFile(aPath, content: r'''
 class A {}
diff --git a/pkg/analyzer/test/src/pubspec/pubspec_validator_test.dart b/pkg/analyzer/test/src/pubspec/pubspec_validator_test.dart
index 32f7cf3..8e8944a 100644
--- a/pkg/analyzer/test/src/pubspec/pubspec_validator_test.dart
+++ b/pkg/analyzer/test/src/pubspec/pubspec_validator_test.dart
@@ -196,6 +196,73 @@
 ''');
   }
 
+  test_dependencyGit_malformed_empty() {
+    // todo (pq): consider validating.
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    git:
+''');
+  }
+
+  test_dependencyGit_malformed_list() {
+    // todo (pq): consider validating.
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    git:
+      - baz
+''');
+  }
+
+  test_dependencyGit_malformed_scalar() {
+    // todo (pq): consider validating.
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    git: baz
+''');
+  }
+
+  test_dependencyGit_noVersion_valid() {
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    git:      
+      url: git@github.com:foo/foo.git
+      path: path/to/foo
+''');
+  }
+
+  test_dependencyGit_version_error() {
+    assertErrors('''
+name: sample
+version: 0.1.0
+dependencies:
+  foo:
+    git:      
+      url: git@github.com:foo/foo.git
+      path: path/to/foo
+''', [PubspecWarningCode.INVALID_DEPENDENCY]);
+  }
+
+  test_dependencyGit_version_valid() {
+    assertNoErrors('''
+name: sample
+version: 0.1.0
+publish_to: none
+dependencies:
+  foo:
+    git:      
+      url: git@github.com:foo/foo.git
+      path: path/to/foo
+''');
+  }
+
   test_dependencyGitPath() {
     // git paths are not validated
     assertNoErrors('''
@@ -208,6 +275,40 @@
 ''');
   }
 
+  test_dependencyPath_malformed_empty() {
+    // todo (pq): consider validating.
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    path:
+''');
+  }
+
+  test_dependencyPath_malformed_list() {
+    // todo (pq): consider validating.
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    path: 
+     - baz
+''');
+  }
+
+  test_dependencyPath_noVersion_valid() {
+    newFolder('/foo');
+    newFile('/foo/pubspec.yaml', content: '''
+name: foo
+''');
+    assertNoErrors('''
+name: sample
+dependencies:
+  foo:
+    path: /foo
+''');
+  }
+
   test_dependencyPath_pubspecDoesNotExist() {
     newFolder('/foo');
     assertErrors('''
@@ -257,6 +358,35 @@
 ''');
   }
 
+  test_dependencyPath_version_error() {
+    newFolder('/foo');
+    newFile('/foo/pubspec.yaml', content: '''
+name: foo
+''');
+    assertErrors('''
+name: sample
+version: 0.1.0
+dependencies:
+  foo:
+    path: /foo
+''', [PubspecWarningCode.INVALID_DEPENDENCY]);
+  }
+
+  test_dependencyPath_version_valid() {
+    newFolder('/foo');
+    newFile('/foo/pubspec.yaml', content: '''
+name: foo
+''');
+    assertNoErrors('''
+name: sample
+version: 0.1.0
+publish_to: none
+dependencies:
+  foo:
+    path: /foo
+''');
+  }
+
   test_dependencyPathDoesNotExist_path_error() {
     assertErrors('''
 name: sample
@@ -288,6 +418,19 @@
 ''');
   }
 
+  test_devDependencyGit_version_no_error() {
+    // Git paths are OK in dev_dependencies
+    assertNoErrors('''
+name: sample
+version: 0.1.0
+dev_dependencies:
+  foo:
+    git:      
+      url: git@github.com:foo/foo.git
+      path: path/to/foo
+''');
+  }
+
   test_devDependencyPathDoesNotExist_path_error() {
     assertErrors('''
 name: sample
diff --git a/tools/VERSION b/tools/VERSION
index ba1203e..6a2eb32 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 11
 PATCH 0
-PRERELEASE 272
+PRERELEASE 273
 PRERELEASE_PATCH 0
\ No newline at end of file