Steps to reproduce:

Open the attached project
Select Bug > "Control - valid options and 8 primitives". The Console shows "CONTROL OK - built 96 nodes" and the Editor is fine.
Select Bug > "Crash A - default-constructed GpuBvhBuildOptions". The Editor dies.
Reopen the project, then select Bug > "Crash B - empty primitive span, valid options". It dies again, on a different stack.

Actual result: The Editor terminates with SIGSEGV. Two distinct native stacks depending on the case. All unsaved work is lost.

Expected result: An empty primitive span returns an empty result. An invalid maxLeafSize is rejected with an ArgumentException naming the field, or defaulted to a working value. Better still, GpuBvhBuildOptions should carry usable defaults, since it is a struct and callers cannot be prevented from default-constructing it.

Reproducible with versions: 6000.0.84f1, 6000.3.24f1, 6000.6.3f1, 6000.7.0b2, 7000.0.0a1

Can't test with versions: 6000.0.0f1

Tested on (OS): macOS 26.6.2 (Darwin 25.6.0), Apple silicon

First lines of Stack Trace:

Crash A, default-constructed options, 39 frames, on 6000.0.84f1:

#0  Embree::ConvertToUnityBvh(Embree::Node*, unsigned long, Embree::BuildOptions const&, core::vector(...))
#1  Embree::GpuBvhBuild(Embree::BuildOptions const&, Embree::PrimDesc const*, unsigned long, core::vector(...))
#2  Embree::GpuBvh::Build(Embree::BuildOptions const&, ScriptingSpan(Embree::PrimDesc) const&)
#3  GpuBvh_CUSTOM_Build(Embree::BuildOptions const&, BindingsManagedSpan*)

Crash B, empty primitive span, 43 frames, on 6000.0.84f1:

#0  Embree::LeafNode::Create(RTCThreadLocalAllocatorTy*, RTCBuildPrimitive const*, unsigned long, void*)
#1  embree::avx2::GeneralBVHBuilder::BuilderT(...)::recurse(...)
#3  embree::avx2::rtcBuildBVHBinnedSAH(RTCBuildArguments const*)
#4  rtcBuildBVH