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# Error code E0439

#### Note: this error code is no longer emitted by the compiler.

The length of the platform-intrinsic function `simd_shuffle` wasn't specified.

Erroneous code example:

    #![feature(platform_intrinsics)]

    extern "platform-intrinsic" {
        fn simd_shuffle<A,B>(a: A, b: A, c: [u32; 8]) -> B;
        // error: invalid `simd_shuffle`, needs length: `simd_shuffle`
    }

The `simd_shuffle` function needs the length of the array passed as last parameter in its name. Example:

    #![feature(platform_intrinsics)]

    extern "platform-intrinsic" {
        fn simd_shuffle8<A,B>(a: A, b: A, c: [u32; 8]) -> B;
    }