How to reproduce:
1. Create a new HDRP project
2. Add a new Shader Graph asset (Assets -> Shader -> Unlit Graph)
3. Open the created asset in the Shader Editor
4. Create a new node
-- observe the crash

Reproducible with: 2019.3.0b6, 2020.1.0a8 (HDRP 7.0.1)
Not reproducible with: 2018.4.11f1 (HDRP 4.1.0) 2019.2.8f1 (HDRP 6.9.0), 2019.3.0a11 (HDRP 7.0.1)
Regression from 2019.3.0a11 to 2019.3.0a12 (HDRP 7.0.1)
Could not test with 2017.4 since HDRP is not available there
Could not test with HDRP 7.1.2 since the Editor was constantly crashing

First 5 stack trace lines:
#0 0x007f175421f6c7 in _nv042glcore
#1 0x00557742a8daff in vk::DescriptorState::Bind(VkDevice_T*, vk::CommandBuffer*, vk::GpuProgramBase&)
#2 0x00557742a5ddb3 in GfxDeviceVKBase::DrawBuffersInternal(VkBuffer_T*, unsigned long, unsigned int, VkBuffer_T* const*, unsigned int const*, unsigned long const*, int, DrawBuffersRange const*, int, VertexDeclaration*, unsigned int, int)
#3 0x00557742a662ec in GfxDeviceVKBase::DrawBufferRangesPlatform(GfxBuffer*, unsigned int, GfxBuffer* const*, unsigned int const*, int, DrawBuffersRange const*, int, VertexDeclaration*, unsigned long, int)
#4 0x00557742a66336 in non-virtual thunk to GfxDeviceVKBase::DrawBufferRangesPlatform(GfxBuffer*, unsigned int, GfxBuffer* const*, unsigned int const*, int, DrawBuffersRange const*, int, VertexDeclaration*, unsigned long, int)

Notes:
- Very rarely not reproducible