2.81 EEVEE and MB-Lab 1.7.6 skin shader displacement rendering

[animate1978]

Describe the bug
The Aug 30 build of Blender 2.81 and MB-Lab 1.7.6

Linux build

To Reproduce
Steps to reproduce the behavior:
Boot up 2.81
version: 2.81 (sub 4), branch: master, commit date: 2019-08-30 09:58, hash: f033fa0fbcfb, type: Release

Current Dev Branch of MB-Lab 1.7.6

Create human based character.

Change Viewport shading to LookDev mode

Expected behavior
Not this

Screenshots

Additional context
Just note : IT IS NOT RECOMMENDED FOR PRODUCTION USE

Logs
To format it correctly, logs should go in between these:
Replace the text here with your logs. To turn on the console in Blender 2.80 go to Window>Toggle System Console.

[animate1978]

Took a while to figure out what the issue is.

Related to the Displacements in the shader nodes.

[animate1978]

Using Sep 5 build of Blender 2.81 results with a major shader crash.

...

 Closure nodetree_exec(void)
11991  {
11992  	#define objmat ModelMatrix
11993  	vec3 facingwnormal;
11994  	world_normals_get(facingwnormal);
11995  	#define viewposition viewPosition
11996  	vec3 tmp2;
11997  	vec3 tmp10;
11998  	vec4 tmp13;
11999  	float tmp14;
12000  	vec4 tmp16;
12001  	vec3 tmp24;
12002  	vec4 tmp27;
12003  	float tmp28;
12004  	vec4 tmp30;
12005  	vec3 tmp38;
12006  	vec4 tmp41;
12007  	float tmp42;
12008  	vec4 tmp44;
12009  	vec3 tmp45;
12010  	Closure tmp48;
12011  	vec3 tmp49;
12012  	Closure tmp52;
12013  	Closure tmp56;
12014  	vec4 tmp66;
12015  	vec3 tmp67;
12016  	vec3 tmp68;
12017  	vec3 tmp70;
12018  	vec3 tmp74;
12019  	vec3 tmp75;
12020  	Closure tmp102;
12021  	Closure tmp106;
12022  	vec3 tmp107;
12023  	Closure tmp112;
12024  	Closure tmp116;
12025  	vec3 tmp117;
12026  	Closure tmp123;
12027  	Closure tmp127;
12028  	Closure tmp131;
12029  
12030  	node_uvmap(var0, tmp2);
12031  	mapping_mat4(tmp2, unf4, unf5, unf6, unf7, unf8, unf9, tmp10);
12032  	node_tex_image_linear(tmp10, samp0, tmp13, tmp14);
12033  	color_alpha_premultiply(tmp13, tmp16);
12034  	mapping_mat4(tmp2, unf18, unf19, unf20, unf21, unf22, unf23, tmp24);
12035  	node_tex_image_linear(tmp24, samp1, tmp27, tmp28);
12036  	color_alpha_premultiply(tmp27, tmp30);
12037  	mapping_mat4(tmp2, unf32, unf33, unf34, unf35, unf36, unf37, tmp38);
12038  	node_tex_image_linear(tmp38, samp2, tmp41, tmp42);
12039  	color_alpha_premultiply(tmp41, tmp44);
12040  	world_normals_get(tmp45);
12041  	node_bsdf_translucent(unf46, tmp45, tmp48);
12042  	world_normals_get(tmp49);
12043  	node_bsdf_translucent(unf50, tmp49, tmp52);
12044  	node_mix_shader(dot(tmp44.rgb, vec3(0.2126, 0.7152, 0.0722)), tmp48, tmp52, tmp56);
12045  	curves_rgb(unf57, tmp16, samp3, cons60, unf61, unf62, unf63, unf64, unf65, tmp66);
12046  	world_normals_get(tmp67);
12047  	world_normals_get(tmp68);
12048  	tangent_orco_z(var1, tmp70);
12049  	node_tangent(facingwnormal, tmp70, objmat, tmp74);
12050  	set_rgb_one(tmp75);
12051  	node_bsdf_principled_subsurface(tmp66, unf77, unf78, unf79, unf80, unf81, unf82, unf83, unf84, unf85, unf86, unf87, unf88, unf89, unf90, unf91, unf92, unf93, unf94, tmp67, tmp68, tmp74, viewposition, cons99, cons100, tmp75, tmp102);
12052  	node_mix_shader(dot(tmp30.rgb, vec3(0.2126, 0.7152, 0.0722)), tmp56, tmp102, tmp106);
12053  	world_normals_get(tmp107);
12054  	node_bsdf_glossy(unf108, unf109, tmp107, cons111, tmp112);
12055  	node_mix_shader(unf113, tmp112, tmp106, tmp116);
12056  	world_normals_get(tmp117);
12057  	node_bsdf_glass(unf118, unf119, unf120, tmp117, cons122, tmp123);
12058  	node_mix_shader(dot(tmp44.rgb, vec3(0.2126, 0.7152, 0.0722)), tmp123, tmp116, tmp127);
12059  	node_output_material(tmp127, strct129, cons130, tmp131);
12060  
12061  	return tmp131;
12062  }
12063  #ifndef NODETREE_EXEC
12064  out vec4 fragColor;
12065  void main()
12066  {
12067  	Closure cl = nodetree_exec();
12068  	fragColor = vec4(cl.radiance, saturate(1.0 - avg(cl.transmittance)));
12069  }
12070  #endif
12071  
0:11853(20): error: no function with name 'noise_turbulence'
0:11853(7): error: operands to arithmetic operators must be numeric
0:11853(2): error: operands to arithmetic operators must be numeric
0:11853(2): error: could not implicitly convert error to float

The error produced a LOT more debugging code, too much to paste here.

[animate1978]

version: 2.81 (sub 8), branch: master, commit date: 2019-09-06 22:44, hash: ed779333bb82, type: Release
build date: 2019-09-07, 01:05:57

The shader compilation and rendering issues were fixed in this build