Variable has incomplete type 'SamplerState [2]'

Hello! I have a function in the shader that takes an array of textures and samplers (for ray tracing). It looks like this:

... Reflection(Texture2D<float4> Textures[4],
               SamplerState Samplers[2],
               ...

This function and the shader used to work just fine, however, with the latest version of DXC (https://github.com/microsoft/DirectXShaderCompiler/commit/42eb79311e1c7f4ce6e110ec631243708664133b) it fails with the following error:

hlsl.hlsl:175:42: error: variable has incomplete type 'SamplerState [2]'
                            SamplerState Samplers[2],
                                         ^

Note that placing the sampler into a struct and passing this struct to the function fixes the error for DXIL:

struct Resources
{
    SamplerState Samplers[2];
};
... Reflection(Texture2D<float4> Textures[4],
               Resources Res, // No error
               ...

However, when compiling this shader for SPIR-V, it errors out with the following message:

fatal error: generated SPIR-V is invalid: [VUID-StandaloneSpirv-None-04667] In Vulkan, OpTypeStruct must not contain an opaque type.
  %Test = OpTypeStruct %_arr_type_sampler_uint_2

note: please file a bug report on https://github.com/Microsoft/DirectXShaderCompiler/issues with source code if possible

Interestingly, just having the structure before the function actually makes sampler array work.

struct Resources
{
    SamplerState Samplers[2];
};
... Reflection(Texture2D<float4> Textures[4],
               SamplerState Samplers[2], // No error
               ...

Start with the HLSL reproduction in hlsl.hlsl around line 175 and compare behavior before and after the referenced DXC commit. Reproduce both the DXIL and SPIR-V compilations, including the struct workaround. Done means the sampler array parameter compiles correctly without producing invalid SPIR-V.