apache/maven · error · TypeNotBoundException

Type variable not found: {} ( {} )

Error message

Type variable not found: {} ( {} )

What it means

Error "Type variable not found: {} ( {} )" thrown in apache/maven.

Source

Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/Types.java:192

     */
    public static Type bind(Type type, Map<TypeVariable<?>, Type> bindings) {
        return bind(type, bindings::get);
    }

    /**
     * Binds a given type with actual type arguments
     *
     * @param type     a type to be bound
     * @param bindings a lookup function for actual types
     */
    public static Type bind(Type type, Function<TypeVariable<?>, Type> bindings) {
        if (type instanceof Class) {
            return type;
        }
        if (type instanceof TypeVariable<?> typeVariable) {
            Type actualType = bindings.apply(typeVariable);
            if (actualType == null) {
                throw new TypeNotBoundException("Type variable not found: " + typeVariable + " ( "
                        + typeVariable.getGenericDeclaration() + " ) ");
            }
            return actualType;
        }
        if (type instanceof ParameterizedType parameterizedType) {
            Type[] typeArguments = parameterizedType.getActualTypeArguments();
            Type[] typeArguments2 = new Type[typeArguments.length];
            for (int i = 0; i < typeArguments.length; i++) {
                typeArguments2[i] = bind(typeArguments[i], bindings);
            }
            return new ParameterizedTypeImpl(
                    parameterizedType.getOwnerType(), parameterizedType.getRawType(), typeArguments2);
        }
        if (type instanceof GenericArrayType genericArrayType) {
            Type componentType = genericArrayType.getGenericComponentType();
            return new GenericArrayTypeImpl(bind(componentType, bindings));
        }
        if (type instanceof WildcardType wildcardType) {

View on GitHub (pinned to e4093d4e12)

When it happens

Trigger: Thrown at impl/maven-di/src/main/java/org/apache/maven/di/impl/Types.java:192 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/maven@e4093d4e12 (2026-08-21). Data as JSON: /api/errors/0b81261c07394bd5. Report an issue: GitHub.