Provides failing test for #1525

internal/test/issues/issue-1525/config.yaml

@@ -0,0 +1,4 @@
+package: issue1525
+generate:
+  models: true
+output: issue1525.gen.go

internal/test/issues/issue-1525/doc.go

@@ -0,0 +1,3 @@
+package issue1525
+
+//go:generate go run github.com/deepmap/oapi-codegen/v2/cmd/oapi-codegen --config=config.yaml spec.yaml

internal/test/issues/issue-1525/spec.yaml

@@ -0,0 +1,25 @@
+openapi: 3.0.0
+
+paths:
+  thing:
+    get:
+      responses:
+        "200":
+          description: Successful response
+          content:
+            application/json:
+              schema:
+                $ref: "#/components/schemas/Thing"
+
+components:
+  schemas:
+    String:
+      type: string
+    Thing:
+      type: object
+      properties:
+        x:
+          $ref: "#/components/schemas/String"
+          nullable: true
+      required:
+        - x