[SPIRV] Invalid OpCompositeConstruct when aggregate-initializing struct with resource member

[bob80905]

When compiling HLSL that uses brace initialization to construct a struct containing a resource member, DXC's SPIRV backend generates invalid SPIR-V:

fatal error: generated SPIR-V is invalid: Expected Constituent type to be equal to the corresponding member type of Result Type struct %15 = OpCompositeConstruct %ResHolder_0 %Out

Repro:

RWByteAddressBuffer Out : register(u0);

struct ResHolder { RWByteAddressBuffer buf; };

[numthreads(1,1,1)] 
void main() {  
ResHolder h = {Out};
  h.buf.Store(0, 42); 
}

Command:

dxc.exe -spirv -fspv-target-env=vulkan1.3 -T cs_6_0 -Fo out.spv repro.hlsl

DXC DXIL compiles and runs this correctly. DXC version: main (built from source).