Fix #1146

modules/swagger-parser/src/main/java/io/swagger/parser/util/SwaggerDeserializer.java

@@ -218,7 +218,7 @@ private boolean isPathParamDefined(String pathParam, List<Parameter> parameters)
             return false;
         } else {
             for (Parameter parameter : parameters) {
-                if (pathParam.equals(parameter.getName()) && "path".equals(parameter.getIn())) {
+                if (parameter instanceof RefParameter || (pathParam.equals(parameter.getName()) && "path".equals(parameter.getIn()))) {
                     return true;
                 }
             }

modules/swagger-parser/src/test/java/io/swagger/parser/SwaggerParserTest.java

@@ -85,6 +85,12 @@ public void testIssue111() {
         assertNotNull(result.getSwagger());
     }
 
+    @Test
+    public void testIssue1146() {
+        SwaggerDeserializationResult result = new SwaggerParser().readWithInfo("issue-1146.yaml", null, true);
+        assertEquals(0, result.getMessages().size());
+    }
+
     @Test
     public void testIssueDefinitionWithDots_2() {
         Swagger swagger = new SwaggerParser().read("SimpleAPI.yaml");

modules/swagger-parser/src/test/resources/issue-1146.yaml

@@ -0,0 +1,39 @@
+swagger: "2.0"
+info:
+  description: "Test"
+  version: "1.0.0"
+  title: "Swagger v2 example"
+  termsOfService: "http://swagger.io/terms/"
+  contact:
+    email: "apiteam@swagger.io"
+  license:
+    name: "Apache 2.0"
+    url: "http://www.apache.org/licenses/LICENSE-2.0.html"
+host: "petstore.swagger.io"
+basePath: "/v2"
+schemes:
+  - "https"
+  - "http"
+paths:
+  /brands/{brand-id}/stations:
+    get:
+      tags:
+        - Brand
+      summary: Returns a list of the brand's stations
+      operationId: getBrandStations
+      parameters:
+        - $ref: "#/parameters/brand-id"
+        - in: query
+          name: available-to-client-only
+          required: true
+          type: boolean
+      responses:
+        200:
+          description: OK
+parameters:
+  brand-id:
+    in: path
+    description: this is a test
+    name: brand-id
+    required: true
+    type: string