diff --git a/pkg/analysis_server/doc/api.html b/pkg/analysis_server/doc/api.html
index 1b3a7581d72e..b20b6603ae7b 100644
--- a/pkg/analysis_server/doc/api.html
+++ b/pkg/analysis_server/doc/api.html
@@ -2908,7 +2908,12 @@ <h2 class="domain"><a name="types">Types</a></h2>
       <dl><dt class="value">LIBRARY</dt><dt class="value">PART</dt></dl></dd><dt class="typeDefinition"><a name="type_FilePath">FilePath: String</a></dt><dd>
         
         <p>
-          The absolute path of a file.
+          The absolute, normalized path of a file.
+        </p>
+        <p>
+          If the format of a file path in a request is not valid, e.g. the
+          path is not absolute or is not normalized, then an error of type
+          <tt>INVALID_FILE_PATH_FORMAT</tt> will be generated.
         </p>
       </dd><dt class="typeDefinition"><a name="type_FoldingKind">FoldingKind: String</a></dt><dd>
         <p>
@@ -3686,6 +3691,12 @@ <h2 class="domain"><a name="types">Types</a></h2>
               The context root used to create an execution context does not
               exist.
             </p>
+          </dd><dt class="value">INVALID_FILE_PATH_FORMAT</dt><dd>
+            
+            <p>
+              The format of the given file path is invalid, e.g. is not
+              absolute and normalized.
+            </p>
           </dd><dt class="value">INVALID_OVERLAY_CHANGE</dt><dd>
             
             <p>
diff --git a/pkg/analysis_server/lib/plugin/protocol/generated_protocol.dart b/pkg/analysis_server/lib/plugin/protocol/generated_protocol.dart
index e7c53595277b..e931ba3b8e91 100644
--- a/pkg/analysis_server/lib/plugin/protocol/generated_protocol.dart
+++ b/pkg/analysis_server/lib/plugin/protocol/generated_protocol.dart
@@ -14065,6 +14065,7 @@ class RequestError implements HasToJson {
  *   GET_REACHABLE_SOURCES_INVALID_FILE
  *   INVALID_ANALYSIS_ROOT
  *   INVALID_EXECUTION_CONTEXT
+ *   INVALID_FILE_PATH_FORMAT
  *   INVALID_OVERLAY_CHANGE
  *   INVALID_PARAMETER
  *   INVALID_REQUEST
@@ -14137,6 +14138,12 @@ class RequestErrorCode implements Enum {
    */
   static const INVALID_EXECUTION_CONTEXT = const RequestErrorCode._("INVALID_EXECUTION_CONTEXT");
 
+  /**
+   * The format of the given file path is invalid, e.g. is not absolute and
+   * normalized.
+   */
+  static const INVALID_FILE_PATH_FORMAT = const RequestErrorCode._("INVALID_FILE_PATH_FORMAT");
+
   /**
    * An "analysis.updateContent" request contained a ChangeContentOverlay
    * object which can't be applied, due to an edit having an offset or length
@@ -14232,7 +14239,7 @@ class RequestErrorCode implements Enum {
   /**
    * A list containing all of the enum values that are defined.
    */
-  static const List<RequestErrorCode> VALUES = const <RequestErrorCode>[CONTENT_MODIFIED, FILE_NOT_ANALYZED, FORMAT_INVALID_FILE, FORMAT_WITH_ERRORS, GET_ERRORS_INVALID_FILE, GET_NAVIGATION_INVALID_FILE, GET_REACHABLE_SOURCES_INVALID_FILE, INVALID_ANALYSIS_ROOT, INVALID_EXECUTION_CONTEXT, INVALID_OVERLAY_CHANGE, INVALID_PARAMETER, INVALID_REQUEST, NO_INDEX_GENERATED, ORGANIZE_DIRECTIVES_ERROR, REFACTORING_REQUEST_CANCELLED, SERVER_ALREADY_STARTED, SERVER_ERROR, SORT_MEMBERS_INVALID_FILE, SORT_MEMBERS_PARSE_ERRORS, UNANALYZED_PRIORITY_FILES, UNKNOWN_REQUEST, UNKNOWN_SOURCE, UNSUPPORTED_FEATURE];
+  static const List<RequestErrorCode> VALUES = const <RequestErrorCode>[CONTENT_MODIFIED, FILE_NOT_ANALYZED, FORMAT_INVALID_FILE, FORMAT_WITH_ERRORS, GET_ERRORS_INVALID_FILE, GET_NAVIGATION_INVALID_FILE, GET_REACHABLE_SOURCES_INVALID_FILE, INVALID_ANALYSIS_ROOT, INVALID_EXECUTION_CONTEXT, INVALID_FILE_PATH_FORMAT, INVALID_OVERLAY_CHANGE, INVALID_PARAMETER, INVALID_REQUEST, NO_INDEX_GENERATED, ORGANIZE_DIRECTIVES_ERROR, REFACTORING_REQUEST_CANCELLED, SERVER_ALREADY_STARTED, SERVER_ERROR, SORT_MEMBERS_INVALID_FILE, SORT_MEMBERS_PARSE_ERRORS, UNANALYZED_PRIORITY_FILES, UNKNOWN_REQUEST, UNKNOWN_SOURCE, UNSUPPORTED_FEATURE];
 
   final String name;
 
@@ -14258,6 +14265,8 @@ class RequestErrorCode implements Enum {
         return INVALID_ANALYSIS_ROOT;
       case "INVALID_EXECUTION_CONTEXT":
         return INVALID_EXECUTION_CONTEXT;
+      case "INVALID_FILE_PATH_FORMAT":
+        return INVALID_FILE_PATH_FORMAT;
       case "INVALID_OVERLAY_CHANGE":
         return INVALID_OVERLAY_CHANGE;
       case "INVALID_PARAMETER":
diff --git a/pkg/analysis_server/lib/src/analysis_server.dart b/pkg/analysis_server/lib/src/analysis_server.dart
index 6a5ace1f3ee8..980bb9de7126 100644
--- a/pkg/analysis_server/lib/src/analysis_server.dart
+++ b/pkg/analysis_server/lib/src/analysis_server.dart
@@ -72,7 +72,7 @@ class AnalysisServer {
    * The version of the analysis server. The value should be replaced
    * automatically during the build.
    */
-  static final String VERSION = '1.12.0';
+  static final String VERSION = '1.14.0';
 
   /**
    * The number of milliseconds to perform operations before inserting
diff --git a/pkg/analysis_server/test/integration/protocol_matchers.dart b/pkg/analysis_server/test/integration/protocol_matchers.dart
index cb2f80465a49..6266cb93ba85 100644
--- a/pkg/analysis_server/test/integration/protocol_matchers.dart
+++ b/pkg/analysis_server/test/integration/protocol_matchers.dart
@@ -2102,6 +2102,7 @@ final Matcher isRequestError = new LazyMatcher(() => new MatchesJsonObject(
  *   GET_REACHABLE_SOURCES_INVALID_FILE
  *   INVALID_ANALYSIS_ROOT
  *   INVALID_EXECUTION_CONTEXT
+ *   INVALID_FILE_PATH_FORMAT
  *   INVALID_OVERLAY_CHANGE
  *   INVALID_PARAMETER
  *   INVALID_REQUEST
@@ -2128,6 +2129,7 @@ final Matcher isRequestErrorCode = new MatchesEnum("RequestErrorCode", [
   "GET_REACHABLE_SOURCES_INVALID_FILE",
   "INVALID_ANALYSIS_ROOT",
   "INVALID_EXECUTION_CONTEXT",
+  "INVALID_FILE_PATH_FORMAT",
   "INVALID_OVERLAY_CHANGE",
   "INVALID_PARAMETER",
   "INVALID_REQUEST",
diff --git a/pkg/analysis_server/tool/spec/generated/java/types/RequestErrorCode.java b/pkg/analysis_server/tool/spec/generated/java/types/RequestErrorCode.java
index a5e439fae12a..346bf6381831 100644
--- a/pkg/analysis_server/tool/spec/generated/java/types/RequestErrorCode.java
+++ b/pkg/analysis_server/tool/spec/generated/java/types/RequestErrorCode.java
@@ -75,6 +75,11 @@ public class RequestErrorCode {
    */
   public static final String INVALID_EXECUTION_CONTEXT = "INVALID_EXECUTION_CONTEXT";
 
+  /**
+   * The format of the given file path is invalid, e.g. is not absolute and normalized.
+   */
+  public static final String INVALID_FILE_PATH_FORMAT = "INVALID_FILE_PATH_FORMAT";
+
   /**
    * An "analysis.updateContent" request contained a ChangeContentOverlay object which can't be
    * applied, due to an edit having an offset or length that is out of range.
diff --git a/pkg/analysis_server/tool/spec/spec_input.html b/pkg/analysis_server/tool/spec/spec_input.html
index 3dc5819a5dd6..3bb6cfea24a9 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -2683,7 +2683,12 @@ <h2 class="domain"><a name="types">Types</a></h2>
       <type name="FilePath">
         <ref>String</ref>
         <p>
-          The absolute path of a file.
+          The absolute, normalized path of a file.
+        </p>
+        <p>
+          If the format of a file path in a request is not valid, e.g. the
+          path is not absolute or is not normalized, then an error of type
+          <tt>INVALID_FILE_PATH_FORMAT</tt> will be generated.
         </p>
       </type>
       <type name="FoldingKind">
@@ -3696,6 +3701,13 @@ <h2 class="domain"><a name="types">Types</a></h2>
               exist.
             </p>
           </value>
+          <value>
+            <code>INVALID_FILE_PATH_FORMAT</code>
+            <p>
+              The format of the given file path is invalid, e.g. is not
+              absolute and normalized.
+            </p>
+          </value>
           <value>
             <code>INVALID_OVERLAY_CHANGE</code>
             <p>