Unity-Technologies/UnityCsReference · error · ArgumentException

rendererIDs and results NativeArrays don't match in length.

Error message

rendererIDs and results NativeArrays don't match in length.

What it means

Thrown by the current GetRenderersFilteringResults(ReadOnlySpan<EntityId>, Span<bool>) overload when rendererIDs.Length != results.Length. The native implementation writes one bool per renderer, so the caller must supply a results span of identical length. A length mismatch throws ArgumentException.

Source

Thrown at Editor/Mono/Camera/EditorCameraUtils.bindings.cs:32

namespace UnityEditor.Rendering
{
    [NativeHeader("Editor/Src/Camera/EditorCameraUtils.h")]
    [RequiredByNativeCode]
    public static class EditorCameraUtils
    {
        public static bool RenderToCubemap(this Camera camera, Texture target, int faceMask, StaticEditorFlags culledFlags)
            => RenderToCubemapImpl(camera, target, faceMask, culledFlags) == 1;

        [System.Obsolete("GetRenderersFilteringResults(ReadOnlySpan<int>) is obsolete. Use GetRenderersFilteringResults(ReadOnlySpan<EntityId>) instead.", true)]
        public static unsafe void GetRenderersFilteringResults(ReadOnlySpan<int> rendererIDs, Span<bool> results)
        {
            throw new System.NotImplementedException("GetRenderersFilteringResults(ReadOnlySpan<int>) is obsolete. Use GetRenderersFilteringResults(ReadOnlySpan<EntityId>) instead.");
        }

        public static unsafe void GetRenderersFilteringResults(ReadOnlySpan<EntityId> rendererIDs, Span<bool> results)
        {
            if (rendererIDs.Length != results.Length)
                throw new ArgumentException("rendererIDs and results NativeArrays don't match in length.");

            GetRenderersFilteringResultsImpl(rendererIDs, results);
        }

        [System.Obsolete("GetRenderersHiddenResultBits(ReadOnlySpan<int>) is obsolete. Use GetRenderersHiddenResultBits(ReadOnlySpan<EntityId>) instead.", true)]
        public static unsafe void GetRenderersHiddenResultBits(ReadOnlySpan<int> rendererIDs, Span<ulong> resultBits)
        {
            throw new System.NotImplementedException("GetRenderersHiddenResultBits(ReadOnlySpan<int>) is obsolete. Use GetRenderersHiddenResultBits(ReadOnlySpan<EntityId>) instead.");
        }

        public static unsafe void GetRenderersHiddenResultBits(ReadOnlySpan<EntityId> rendererIDs, Span<ulong> resultBits)
        {
            const int kBitsPerChunkCount = sizeof(ulong) * 8;

            int resultBitsLengthExpected = (rendererIDs.Length + kBitsPerChunkCount - 1) / kBitsPerChunkCount;

            if (resultBitsLengthExpected != resultBits.Length)
                throw new ArgumentException("Unexpected resultBits Span length. The expected length of resultBits Span should be equal to the formula: (rendererIDs.Length + 63) / 64");

View on GitHub (pinned to 225b0fbdb5)

Solutions

1. Allocate results with the same length as rendererIDs (new bool[rendererIDs.Length] or Span over matching buffer).
2. Validate lengths match before calling and resize the results buffer if not.
3. Use stackalloc or a pooled buffer sized exactly to rendererIDs.Length.

Example fix

// before
var results = new bool[prevCount];
EditorCameraUtils.GetRenderersFilteringResults(ids, results);

// after
Span<bool> results = ids.Length <= 256 ? stackalloc bool[ids.Length] : new bool[ids.Length];
EditorCameraUtils.GetRenderersFilteringResults(ids, results);

if (rendererIDs.Length == results.Length) EditorCameraUtils.GetRenderersFilteringResults(rendererIDs, results);

static bool LengthsMatch<T1,T2>(ReadOnlySpan<T1> a, Span<T2> b) => a.Length == b.Length;

When it happens

Trigger: Passing a results Span<bool> whose Length differs from the rendererIDs ReadOnlySpan<EntityId> Length — e.g. reusing a pre-sized buffer that does not match the current renderer count.

Common situations: Allocating results once and reusing it across varying renderer sets; off-by-one sizing; pooling buffers without resizing to the new query size.

Related errors

• Platform GUID {platformGuid} is not a valid Unity build plat
• PersistentLocalStorageSize must be between 256 and 4096, but
• Provided GameObject is not a Prefab instance
• Given input object is not a prefab asset
• Object to create variant from has to be a Prefab root

AI-assisted analysis of Unity-Technologies/UnityCsReference@225b0fbdb5 (2026-08-13). Data as JSON: /api/errors/ec43bf4c15ed1a67. Report an issue: GitHub.