Just tried to build with Ubuntu’s Nouveau display driver and the build still failed 
and the call stack is very similar to the one built with nVidia driver installed, only the very top fuctions in libdxcompiler.so are different.
LogCore: === Critical error: ===
Unhandled Exception: SIGSEGV: invalid attempt to read memory at address 0x00000000000218d2
LogCore: Fatal error!
0x000075184f46933f libdxcompiler.so!_ZNK8spvtools3opt11Instruction20GetSingleWordOperandEj(+0x1f)
0x000075184f43804e libdxcompiler.so!UnknownFunction(0x103804d)
0x000075184f42aebb libdxcompiler.so!_ZNK8spvtools3opt17InstructionFolder23FoldInstructionInternalEPNS0_11InstructionE(+0x13a)
0x000075184f42c965 libdxcompiler.so!_ZNK8spvtools3opt17InstructionFolder15FoldInstructionEPNS0_11InstructionE(+0x14)
0x000075184f3797d6 libdxcompiler.so!UnknownFunction(0xf797d5)
0x000075184f3db93a libdxcompiler.so!UnknownFunction(0xfdb939)
0x000075184f3da643 libdxcompiler.so!_ZN8spvtools3opt3CFG32WhileEachBlockInReversePostOrderEPNS0_10BasicBlockERKNSt3__18functionIFbS3_EEE(+0xa2)
0x000075184f3da561 libdxcompiler.so!_ZN8spvtools3opt3CFG30ForEachBlockInReversePostOrderEPNS0_10BasicBlockERKNSt3__18functionIFvS3_EEE(+0xc0)
0x000075184f377aa7 libdxcompiler.so!_ZN8spvtools3opt18SimplificationPass16SimplifyFunctionEPNS0_8FunctionE(+0x186)
0x000075184f3778eb libdxcompiler.so!_ZN8spvtools3opt18SimplificationPass7ProcessEv(+0x3a)
0x000075184f360d30 libdxcompiler.so!_ZN8spvtools3opt4Pass3RunEPNS0_9IRContextE(+0x1f)
0x000075184f363db0 libdxcompiler.so!_ZN8spvtools3opt11PassManager3RunEPNS0_9IRContextE(+0xdf)
0x000075184f35d5ed libdxcompiler.so!_ZNK8spvtools9Optimizer3RunEPKjmPNSt3__16vectorIjNS3_9allocatorIjEEEEP23spv_optimizer_options_t(+0x17c)
0x000075184f0b76df libdxcompiler.so!UnknownFunction(0xcb76de)
0x000075184f14b5cc libdxcompiler.so!UnknownFunction(0xd4b5cb)
0x000075184eb1fd28 libdxcompiler.so!UnknownFunction(0x71fd27)
0x000075184e5c0274 libdxcompiler.so!UnknownFunction(0x1c0273)
0x000075184e5bc13a libdxcompiler.so!UnknownFunction(0x1bc139)
0x000075184e5bd05f libdxcompiler.so!UnknownFunction(0x1bd05e)
0x000075184e5bd6b8 libdxcompiler.so!UnknownFunction(0x1bd6b7)
0x000075184e072d8e libShaderConductor.so!UnknownFunction(0x72d8d)
0x000075184e070267 libShaderConductor.so!_ZN15ShaderConductor8Compiler7CompileERKNS0_10SourceDescERKNS0_7OptionsEPKNS0_10TargetDescEjPNS0_10ResultDescE(+0x286)
0x000075184e06ffda libShaderConductor.so!_ZN15ShaderConductor8Compiler7CompileERKNS0_10SourceDescERKNS0_7OptionsERKNS0_10TargetDescE(+0x19)
0x0000751864dd2f0e libUE4Editor-ShaderCompilerCommon.so!CrossCompiler::FShaderConductorContext::CompileHlslToSpirv(CrossCompiler::FShaderConductorOptions const&, TArray<unsigned int, TSizedDefaultAllocator<(unsigned char)32> >&) [./unrealengine/Engine/Source/Developer/ShaderCompilerCommon/Private/ShaderCompilerCommon.cpp:3029]
0x000075184d362d24 libUE4Editor-VulkanShaderFormat.so!DoCompileVulkanShader(FShaderCompilerInput const&, FShaderCompilerOutput&, FString const&, EVulkanShaderVersion) [./unrealengine/Engine/Source/Developer/VulkanShaderFormat/Private/VulkanShaderCompiler.cpp:3121]
0x000075194948ac2e libUE4Editor-Engine.so!FShaderCompileUtilities::ExecuteShaderCompileJob(FShaderCommonCompileJob&) [./unrealengine/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp:2155]
0x000075194948a72a libUE4Editor-Engine.so!FShaderCompileThreadRunnable::CompileDirectlyThroughDll() [./unrealengine/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp:2122]
0x000075194948b14e libUE4Editor-Engine.so!FShaderCompileThreadRunnable::CompilingLoop() [./unrealengine/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp:2344]
0x0000751949486ce9 libUE4Editor-Engine.so!FShaderCompileThreadRunnableBase::Run() [./unrealengine/Engine/Source/Runtime/Engine/Private/ShaderCompiler/ShaderCompiler.cpp:1751]
0x000075194ba831d7 libUE4Editor-Core.so!FRunnableThreadPThread::Run() [./unrealengine/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.cpp:25]
0x000075194ba3fa83 libUE4Editor-Core.so!FRunnableThreadPThread::_ThreadProc(void*) [./unrealengine/Engine/Source/Runtime/Core/Private/HAL/PThreadRunnableThread.h:185]
0x0000751942694ac3 libc.so.6!UnknownFunction(0x94ac2)
0x0000751942726850 libc.so.6!UnknownFunction(0x12684f)
LogExit: Executing StaticShutdownAfterError