This may well be a compatibility bug, as I asked another colleague to try the same steps on his machien and it worked for him.
To reproduce this:
- Start a new project with the HDRP template in 2019.3.0a12

My machine's specs:
Ubuntu 18.04.3 LTS 64 bit
Intel® Xeon(R) CPU E5-1650 v4 @ 3.60GHz × 12
GeForce GTX 1060 3GB/PCIe/SSE2
Latest Nvidia driver version: 415

Cannot reproduce in 2019.3.0a11 and 2019.2.2f1
Cannot repoduce in 2020.1.0a1
Cannot reproduce on MacOS or Windows
Reproducible in 2019.3.0a11 and 2019.3.0a12, 2019.3.0b1

Stack trace:
Caught fatal signal - signo:11 code:1 errno:0 addr:(nil)
Obtained 7 stack frames.
#0 0x0055e36c3b72fa in DynamicHeapAllocator::Allocate(unsigned long, int)
#1 0x0055e36c394767 in MemoryManager::Allocate(unsigned long, unsigned long, MemLabelId const&, AllocateOptions, char const*, int)
#2 0x0055e36c38e471 in malloc_internal(unsigned long, unsigned long, MemLabelId const&, AllocateOptions, char const*, int)
#3 0x0055e36c8ffb1f in CubemapArray::InitTexture(int, int, int, GraphicsFormat, TextureCreationFlags, int)
#4 0x0055e36c918488 in CubemapArrayScripting::Create(ScriptingObjectOfType<CubemapArray>, int, int, int, GraphicsFormat, TextureCreationFlags)
#5 0x0055e36d46fbbd in CubemapArray_CUSTOM_Internal_CreateImpl(ScriptingBackendNativeObjectPtrOpaque*, int, int, int, GraphicsFormat, TextureCreationFlags)
#6 0x00000042095ec8 in (wrapper managed-to-native) UnityEngine.CubemapArray:Internal_CreateImpl (UnityEngine.CubemapArray,int,int,int,UnityEngine.Experimental.Rendering.GraphicsFormat,UnityEngine.Experimental.Rendering.TextureCreationFlags)
Launching bug reporter
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QNetworkAccessManager(0x1521a10), parent's thread is QThread(0x1389040), current thread is Thread(0x17d8ab0)
[Unity Package Manager (Upm)]
Parent process [3907] was terminated