Handle unwanted properties from oneOf mixins; fix

src/core/run.js

@@ -185,7 +185,7 @@ function run(refs, schema, container) {
 
           // call given thunks if present
           utils.merge(sub, typeof _sub.thunk === 'function'
-            ? _sub.thunk()
+            ? _sub.thunk(sub)
             : _sub);
         });
       }
@@ -200,24 +200,26 @@ function run(refs, schema, container) {
         }
 
         return {
-          thunk() {
+          thunk(rootSchema) {
             const copy = utils.omitProps(sub, ['anyOf', 'oneOf']);
             const fixed = random.pick(mix);
 
             utils.merge(copy, fixed);
 
-            if (sub.oneOf && copy.properties) {
+            // remove additional properties from merged schemas
             mix.forEach(omit => {
-                if (omit !== fixed && omit.required) {
+              if (omit.required && omit !== fixed) {
                 omit.required.forEach(key => {
-                    // remove additional properties from merged schemas
-                    if (!copy.required.includes(key)) {
+                  if (copy.properties && !copy.required.includes(key)) {
                     delete copy.properties[key];
                   }
-                  });
+
+                  if (rootSchema && rootSchema.properties) {
+                    delete rootSchema.properties[key];
                   }
                 });
               }
+            });
 
             return copy;
           },

src/core/traverse.js

@@ -54,7 +54,7 @@ function traverse(schema, path, resolve, rootSchema) {
 
   // thunks can return sub-schemas
   if (typeof schema.thunk === 'function') {
-    return traverse(schema.thunk(), path, resolve);
+    return traverse(schema.thunk(rootSchema), path, resolve);
   }
 
   if (typeof schema.generate === 'function') {