#else outside of #if/#ifdef/#ifndef block ???

[MarioMey]

I'm trying to make this shader (from https://www.shadertoy.com/view/Xsl3zn) work. :

#define PROCEDURAL 0

float4 render( float2 uv )
{
	float4 image_color = image.Sample(builtin_texture_sampler, uv);

#if PROCEDURAL==0
	vec2 warp = texture( image, uv*0.1 + builtin_elapsed_time*vec2(0.04,0.03) ).xz;
#else
	float freq = 3.0*sin(0.5*builtin_elapsed_time);
	vec2 warp = 0.5000*cos( uv.xy*1.0*freq + vec2(0.0,1.0) + builtin_elapsed_time ) +
				0.2500*cos( uv.yx*2.3*freq + vec2(1.0,2.0) + builtin_elapsed_time ) +
				0.1250*cos( uv.xy*4.1*freq + vec2(5.0,3.0) + builtin_elapsed_time ) +
				0.0625*cos( uv.yx*7.9*freq + vec2(3.0,4.0) + builtin_elapsed_time );
#endif

	float2 st = uv + warp*0.5;
	float4 new_image = image.Sample(builtin_texture_sampler, st);
	//~ new_image = vec4( texture( image_color, st ).xyz, 1.0 );
	return new_image;
}

The first problem that #if, #else and #endif lines are not working well:

Could not create the effect due to the following error: /home/mario/meytv/shaders/Warping - texture.glsl (30, 5): Unexpected token after preprocessor, expected newline
/home/mario/meytv/shaders/Warping - texture.glsl (32, 2): #else outside of #if/#ifdef/#ifndef block
/home/mario/meytv/shaders/Warping - texture.glsl (38, 2): #endif outside of #if/#ifdef/#ifndef block

[EDIT] Also, if I comment those lines and lines for PROCEDURAL==1 and I try to make the vec2 warp = texture(... line work, I get no error... but image is unmodified.
☝ This is erroneous: it does work, but the texture that it is used to warp the image does the job (with image moved up-right), and, finally, it dissapears... and then, image is not warped any more. It's a nice warpping effect... I would like it to work, but it isn't indispensable. So, it is not part of the bug.

[Limeth]

Hello, thank you for the bug report. It might be related to the way #pragma shaderfilter macros are processed, so I will investigate that.