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Compilation bug: unary - on unsigned literal

System Setup Information:
-----------------------------------------

System Used: hp elitebook 840 g5
CPU SKU: Intel(R) Core(TM) i7-8650U CPU @ 1.90GHz
GPU SKU: UHD Graphics 620
Processor Line: N/A
System BIOS Version: N/A
CMOS settings: N/A
Graphics Driver Version: 25.20.100.6519
GOP/VBIOS Version: N/A
Operating System: Windows 10 
OS Version: 1803 (10.0.17134)
API: opengl
Occurs on non-Intel GPUs?: not on nvidia

Steps to Reproduce:
-------------------------------

This shader fail to compile:

"#version 430\n"
"uniform mat4 MVP;\n"
"attribute vec3 vCol;\n"
"attribute vec2 vPos;\n"
"varying vec3 color;\n"
"void main()\n"
"{\n"
"    gl_Position = MVP * vec4(vPos, 0.0, 1.0);\n"
"    uint a = 0u;\n"
"    uint b = -1u;\n"
"    uint c = a+b;\n"
"    color = vCol;\n"
"}\n";

The error message is: Error: ERROR: 0:10: '' : unary '-' not allowed for provided data type

Expected Results:
-------------------------------

Not to fail

 

Actual Results:
-------------------------------

Fail

 

Additional Information:
-------------------------------

Sample project (self contained, based on the "simple" glfw test code): https://goo.gl/bs4RpK. compile with vs2017x64 with "cl simple.c glad.c glfw3dll.lib opengl32.lib gdi32.lib user32.lib kernel32.lib"

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