Error: "Cannot finish reading OpenCL output buffers"

[Michas0206]

Ticket related to mentions of this problem by several users on Facebook.

System information (version)

• mandelbulber2 => 2.29 dev (23/01/23)
• Operating System / Platform => Linux Mint
• NVIDIA Driver Version => 525.78.01

Detailed description

Here is a setting where this error occurs reproduceable...at least for me. It appears immediately when I try to open this file, or when its loaded directly after a restart and I press 'render'.

# Mandelbulber settings file
# version 2.29
# only modified parameters
[main_parameters]
ambient_occlusion 1,5;
ambient_occlusion_color ab00 d400 ff00;
ambient_occlusion_enabled true;
ambient_occlusion_mode 1;
antialiasing_adaptive false;
antialiasing_ocl_depth 0;
background_rotation 0 0 8;
camera -2,88009650481424 2,67933632173391 -1,05796611110479;
camera_distance_to_target 3,15300012588501;
camera_rotation -138,750035815655 12,6893983841244 1,01777749806833e-13;
camera_top -0,14483555309043 0,165153503929284 0,975575206071203;
clouds_center 0 0 3;
clouds_DE_multiplier 0,75;
clouds_density 0,215;
clouds_detail_accuracy 4;
clouds_distance 3;
clouds_distance_layer 1;
clouds_noise_iterations 6;
clouds_period 4;
clouds_plane_shape true;
clouds_random_seed 1749;
clouds_rotation 20 0,21 0;
contrast 1,08;
detail_level 0,740740740740741;
DOF_blur_opacity 7,7;
DOF_focus 3,12175393104553;
DOF_max_noise 5;
DOF_max_radius 125;
fake_lights_color 0c00 7500 ff00;
fake_lights_enabled true;
fake_lights_intensity 1,75;
fake_lights_max_iter 11;
fake_lights_visibility 0,64357277119872;
flight_last_to_render 0;
formula_1 81;
formula_2 144;
formula_3 131;
formula_iterations_1 10;
formula_material_id 2;
formula_stop_iteration_1 125;
formula_stop_iteration_2 25;
formula_weight_1 0,02;
formula_weight_2 0,01;
fractal_position -0,8 -0,941542716049376 0;
fractal_rotation 0 0 103,31;
hybrid_fractal_enable true;
image_height 270;
image_proportion 4;
image_width 480;
iteration_fog_color_2 8d00 8d00 8d00;
iteration_fog_color_3 3800 3700 2900;
iteration_fog_opacity 64000;
iteration_fog_opacity_trim 5,25;
iteration_fog_opacity_trim_high 35;
keyframe_last_to_render 0;
light1_color f300 ff00 0b00;
light1_contour_sharpness 20;
light1_intensity 0,265770683403428;
light1_is_defined true;
light1_position 8,46415692517214 -17,4485006136198 10;
light1_relative_position false;
light1_rotation -160 45 0;
light1_size 4;
light1_soft_shadow_cone 3;
light1_type beam;
light1_use_target_point true;
light1_visibility 0,95;
light2_color e800 0000 0400;
light2_enabled true;
light2_intensity 0,15;
light2_is_defined true;
light2_position -0,82565 0,54526 -0,29061;
light2_rotation 109,65 -29,05 0;
light2_size 0,03125;
light2_type spot;
light3_color f500 6200 0000;
light3_enabled true;
light3_is_defined true;
light3_position 8,46415 -17,44850 10;
light3_size 2;
light3_volumetric true;
light3_volumetric_visibility 0,12;
light4_color fd00 fd00 fd00;
light4_enabled true;
light4_is_defined true;
light4_relative_position true;
light4_rotation -45 45 0;
light4_type directional;
mat1_coloring_speed 0,30;
mat1_fresnel_reflectance true;
mat1_is_defined true;
mat1_reflectance 0,97;
mat1_reflectance_gradient 0 bea82c 3333 d99d34 6666 6b4900;
mat1_reflectance_gradient_enable true;
mat1_specular_metallic 4;
mat1_surface_color_gradient 0 cde275 3333 1e6b7d 3922 518812;
mat1_transparency_index_of_refraction 3;
mat1_transparency_of_surface 1;
mat2_fresnel_reflectance true;
mat2_is_defined true;
mat2_reflectance 0,4;
mat2_specular_metallic 8;
mat2_surface_color 1400 1400 1400;
mat2_surface_color_gradient 0 fd6029 999 698403 1999 fff59b 2999 f5bd22 3999 0b5e87 5000 c68876 5999 a51c64 7000 3b9fee 7999 d4ffd4 9000 aba53c;
mat2_transparency_index_of_refraction 5;
mat2_use_colors_from_palette false;
MC_denoiser_enable true;
MC_denoiser_strength 0;
primitive_water_1_empty true;
primitive_water_1_position 0,118476973863732 0,821827149847698 -0,730541252090068;
primitive_water_1_smooth_de_combine_distance 0,05;
saturation 1,02;
target -0,851957642461355 0,366684266174028 -0,365360148988184;
textured_background_map_type flat;
[fractal_1]
IFS_abs_x true;
IFS_abs_y true;
IFS_abs_z true;
IFS_direction_0 2,62 1 -1,62;
IFS_direction_1 -1,62 2,62 1;
IFS_direction_2 1 -1,62 2,62;
IFS_enabled_0 true;
IFS_enabled_1 true;
IFS_enabled_2 true;
IFS_offset 1 1 1;
IFS_rotation_enabled true;
IFS_scale 2,62;
[fractal_2]
buffalo_abs_x true;
buffalo_preabs_y true;
transf_addition_constantA_000 3,9 1,3 0,028125;
transf_scale_1 -1,724658;

[Michas0206]

Solved by commit 2c84cbff407a76cbac1d1f08a8c18581ff3b0d0d