Fix unprintable class when param types are inferred from assignments using -Ainfer=stubs

framework/src/main/java/org/checkerframework/common/wholeprograminference/WholeProgramInferenceScenes.java

@@ -229,7 +229,11 @@ public void updateFromLocalAssignment(
 
         String className = getEnclosingClassName(lhs);
         String jaifPath = storage.getJaifPath(className);
-        AClass clazz = storage.getAClass(className, jaifPath);
+        AClass clazz =
+                storage.getAClass(
+                        className,
+                        jaifPath,
+                        (ClassSymbol) TreeUtils.elementFromDeclaration(classTree));
         ExecutableElement methodElt = TreeUtils.elementFromDeclaration(methodTree);
         AMethod method = clazz.methods.getVivify(JVMNames.getJVMMethodSignature(methodElt));
         method.setFieldsFromMethodElement(methodElt);

framework/src/main/java/org/checkerframework/common/wholeprograminference/scenelib/ASceneWrapper.java

@@ -163,7 +163,7 @@ public void writeToFile(
     /**
      * Updates the symbol information stored in AClass for the given class. May be called multiple
      * times (and needs to be if the second parameter was null the first time it was called; only
-     * some calls provide the symbol inforamtion).
+     * some calls provide the symbol information).
      *
      * @param aClass the class representation in which the symbol information is to be updated
      * @param classSymbol the source of the symbol information; may be null, in which case this

framework/tests/whole-program-inference/non-annotated/ExpectedErrors.java

@@ -234,4 +234,11 @@ void test() {
             expectsSibling1(field2);
         }
     }
+
+    class AssignParam {
+        public void f(@WholeProgramInferenceBottom Object param) {
+            // :: error: assignment.type.incompatible
+            param = ((@Top Object) null);
+        }
+    }
 }