Bug 521774

DESCRIPTION
Attempting to apply any window open/close effects which utilize shaders on KWin 6.7.0 freezes the desktop for 10 seconds and the effect is not applied. This was not the case on 6.6.

STEPS TO REPRODUCE
1. Install a window open/close effect (Example: Incinerate from schneegan's Burn My Windows)
2. In Animations settings page, choose it and press Apply
3. Notice time taken to apply effect
4. Attempt to open or close any window

OBSERVED RESULT
Effect takes a long time to load while freezing the rest of the desktop, while still not working afterwards.

EXPECTED RESULT
Effect loads quickly and works correctly as it did in Plasma 6.6.5.

SOFTWARE/OS VERSIONS
Operating System: Arch Linux w/ Linux 7.1.0
KDE Plasma Version: 6.7.0
KDE Frameworks Version: 6.27.0
Qt Version: 6.11.1
GPU: AMD Radeon HD 7560D using radeon/r600

ADDITIONAL INFORMATION
Journal logs when pressing apply:
16:04:22.781 UTC plasma-kwin_wayland.service file:///home/techtac/.local/share/kwin/tabbox/fast_thumbnails/contents/ui/main.qml:225:37: Unable to assign [undefined] to bool
16:04:35.123 UTC plasma-kwin_wayland.service 0x22: 0:530(2): error: `fragColor' undeclared
16:04:35.124 UTC plasma-kwin_wayland.service 0x23: 0:530(58): error: `fragColor' undeclared
16:04:35.124 UTC plasma-kwin_wayland.service 0x24: 0:530(14): error: no matching function for call to `sourceEncodingToNitsInDestinationColorspace(error)'; candidates are:
16:04:35.124 UTC plasma-kwin_wayland.service 0x25: 0:530(14): error:    vec4 sourceEncodingToNitsInDestinationColorspace(vec4)
16:04:35.124 UTC plasma-kwin_wayland.service 0x26: 0:531(2): error: `fragColor' undeclared
16:04:35.124 UTC plasma-kwin_wayland.service 0x27: 0:531(40): error: `fragColor' undeclared
16:04:35.124 UTC plasma-kwin_wayland.service 0x28: 0:531(14): error: no matching function for call to `nitsToDestinationEncoding(error)'; candidates are:
16:04:35.124 UTC plasma-kwin_wayland.service 0x29: 0:531(14): error:    vec4 nitsToDestinationEncoding(vec4)
16:04:35.124 UTC plasma-kwin_wayland.service Failed to compile fragment shader: 
 0:530(2): error: `fragColor' undeclared
0:530(58): error: `fragColor' undeclared
0:530(14): error: no matching function for call to `sourceEncodingToNitsInDestinationColorspace(error)'; candidates are:
0:530(14): error:    vec4 sourceEncodingToNitsInDestinationColorspace(vec4)
0:531(2): error: `fragColor' undeclared
0:531(40): error: `fragColor' undeclared
0:531(14): error: no matching function for call to `nitsToDestinationEncoding(error)'; candidates are:
0:531(14): error:    vec4 nitsToDestinationEncoding(vec4)

16:04:35.125 UTC plasma-kwin_wayland.service line 1:#version 140
16:04:35.159 UTC plasma-kwin_wayland.service line 2:#define TRAIT_MAP_TEXTURE 1
16:04:35.159 UTC plasma-kwin_wayland.service line 3:#define TRAIT_UNIFORM_COLOR 0
16:04:35.189 UTC plasma-kwin_wayland.service line 4:#define TRAIT_MODULATE 0
16:04:35.189 UTC plasma-kwin_wayland.service line 5:#define TRAIT_ADJUST_SATURATION 0
16:04:35.218 UTC plasma-kwin_wayland.service line 6:#define TRAIT_TRANSFORM_COLORSPACE 0
16:04:35.219 UTC plasma-kwin_wayland.service line 7:#define TRAIT_MAP_EXTERNAL_TEXTURE 0
16:04:35.247 UTC plasma-kwin_wayland.service line 8:#define TRAIT_MAP_MULTI_PLANE_TEXTURE 0
16:04:35.276 UTC plasma-kwin_wayland.service line 9:#define TRAIT_ROUNDED_CORNERS 0
16:04:35.306 UTC plasma-kwin_wayland.service line 10:#define TRAIT_BORDER 0
16:04:35.335 UTC plasma-kwin_wayland.service line 11:#define TRAIT_YUV_CONVERSION 0
16:04:35.349 UTC plasma-kwin_wayland.service line 12:#define KWIN_LEGACY
16:04:35.362 UTC plasma-kwin_wayland.service line 13:#define PLASMA6
... the rest of the shader file ...
16:04:46.934 UTC plasma-kwin_wayland.service line 1033:
16:04:46.947 UTC plasma-kwin_wayland.service line 1034:  setOutputColor(oColor);
16:04:46.960 UTC plasma-kwin_wayland.service line 1035:}
16:04:46.974 UTC plasma-kwin_wayland.service line 1036:
16:04:46.986 UTC plasma-kwin_wayland.service line 1037:
16:04:47.000 UTC plasma-kwin_wayland.service /home/techtac/.local/share/kwin/effects/kwin6_effect_incinerate/contents/code/main.js:34: error: Shader failed to load