microg/GmsCore · error · RuntimeException

CREATOR in is not accessible

Error message

CREATOR in  is not accessible

What it means

Reflection guard in SafeParcelReflectionUtil.getCreator(Class): the CREATOR field exists but accessing it threw (e.g. setAccessible(true) blocked by hidden-API restrictions or module boundaries). The class name is embedded in the message.

Source

Thrown at play-services-basement/src/main/java/org/microg/safeparcel/SafeParcelReflectionUtil.java:127

        if (clazz.isArray()) {
            clazz = clazz.getComponentType();
        }
        if (clazz != null && Parcelable.class.isAssignableFrom(clazz)) {
            return getCreator((Class<? extends Parcelable>) clazz);
        }
        throw new RuntimeException(clazz + " is not an Parcelable");
    }

    @SuppressWarnings("unchecked")
    public static Parcelable.Creator<Parcelable> getCreator(Class<? extends Parcelable> clazz) {
        try {
            Field creatorField = clazz.getDeclaredField("CREATOR");
            creatorField.setAccessible(true);
            return (Parcelable.Creator<Parcelable>) creatorField.get(null);
        } catch (NoSuchFieldException e) {
            throw new RuntimeException(clazz + " is an Parcelable without CREATOR");
        } catch (IllegalAccessException e) {
            throw new RuntimeException("CREATOR in " + clazz + " is not accessible");
        }
    }

    @SuppressWarnings("deprecation")
    private static Class<?> getSubClass(Field field) {
        SafeParceled safeParceled = field.getAnnotation(SafeParceled.class);
        SafeParcelable.Field safeParcelableField = field.getAnnotation(SafeParcelable.Field.class);
        if (safeParceled != null && safeParceled.subClass() != SafeParceled.class) {
            return safeParceled.subClass();
        } else if (safeParceled != null && !"undefined".equals(safeParceled.subType())) {
            try {
                return Class.forName(safeParceled.subType());
            } catch (ClassNotFoundException e) {
                throw new IllegalArgumentException(e);
            }
        } else if (safeParcelableField != null && safeParcelableField.subClass() != SafeParcelable.class) {
            return safeParcelableField.subClass();
        } else {

View on GitHub (pinned to 157c9d86ac)

Solutions

1. Make the CREATOR field public and statically accessible
2. Bypass the reflective SafeParcel path and implement an explicit CREATOR-based writer/reader for that class

When it happens

Trigger: Thrown at play-services-basement/src/main/java/org/microg/safeparcel/SafeParcelReflectionUtil.java:127 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of microg/GmsCore@157c9d86ac (2026-09-06). Data as JSON: /api/errors/d949f65c7db37138. Report an issue: GitHub.