glslangvalidator compilation fail

output.txt

E:\>glslangvalidator -v
Glslang Version: Overload400-PrecQual.1721 21-Dec-2016
ESSL Version: OpenGL ES GLSL 3.00 glslang LunarG Khronos.Overload400-PrecQual.1721 21-Dec-2016
GLSL Version: 4.20 glslang LunarG Khronos.Overload400-PrecQual.1721 21-Dec-2016
SPIR-V Version 0x00010000, Revision 8
GLSL.std.450 Version 100, Revision 1
Khronos Tool ID 8
GL_KHR_vulkan_glsl version 100
ARB_GL_gl_spirv version 100

E:\>glslangvalidator -S frag -G -o test.fsh.spv testshader.fsh
testshader.fsh
Warning, version 450 is not yet complete; most version-specific features are present, but some are missing.
ERROR: testshader.fsh:8: '' :  syntax error
ERROR: 1 compilation errors.  No code generated.


SPIR-V is not generated for failed compile or link

test.fsh

#version 450

#define BLACK_COLOR

layout (location = 0) out vec4 out_Color;
 
void main(void) {
    vec3 sample;
#ifdef BLACK_COLOR
    sample = vec3(0);
#else
    sample = vec3(1);
#endif
    out_Color = vec4(sample, 1);
}