mewnala: GLFW Error: Wayland: Platform not initialized

[johhnry]

Hi,

This simple sketch:

# sketch.py
from mewnala import run, size


def setup():
    size(500, 500)


def draw():
    pass


run()

Produces:

mewnala-test on  main [?] is 📦 v0.1.0 via 🐍 v3.12.3 took 2s 
❯ uv run sketch.py 
2026-04-23T10:25:50.807136Z  WARN bevy_asset::io::source: Skip creating file watcher because path "/home/joseph.henry/.local/share/uv/python/cpython-3.14.0-linux-x86_64-gnu/bin/assets" does not exist.
2026-04-23T10:25:50.807162Z  WARN bevy_asset::io::source: AssetSourceId::Default does not have an AssetWatcher configured. Consider adding an "assets" directory.
2026-04-23T10:25:50.903768Z  INFO bevy_render::renderer: AdapterInfo { name: "NVIDIA GeForce RTX 4070 Ti SUPER", vendor: 4318, device: 9989, device_type: DiscreteGpu, device_pci_bus_id: "0000:08:00.0", driver: "NVIDIA", driver_info: "570.211.01", backend: Vulkan, subgroup_min_size: 32, subgroup_max_size: 32, transient_saves_memory: false }
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_pipewire.so (/usr/lib64/alsa-lib/libasound_module_pcm_pipewire.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_jack.so (/usr/lib64/alsa-lib/libasound_module_pcm_jack.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_oss.so (/usr/lib64/alsa-lib/libasound_module_pcm_oss.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_pipewire.so (/usr/lib64/alsa-lib/libasound_module_pcm_pipewire.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_pulse.so (/usr/lib64/alsa-lib/libasound_module_pcm_pulse.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_speex.so (/usr/lib64/alsa-lib/libasound_module_pcm_speex.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_upmix.so (/usr/lib64/alsa-lib/libasound_module_pcm_upmix.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_vdownmix.so (/usr/lib64/alsa-lib/libasound_module_pcm_vdownmix.so: cannot open shared object file: No such file or directory)
ALSA lib dlmisc.c:339:(snd_dlobj_cache_get0) Cannot open shared library libasound_module_pcm_pipewire.so (/usr/lib64/alsa-lib/libasound_module_pcm_pipewire.so: cannot open shared object file: No such file or directory)
2026-04-23T10:25:51.326032Z ERROR bevy_asset: AssetSourceId::Name(assets_directory) must be registered before `AssetPlugin` (typically added as part of `DefaultPlugins`)
2026-04-23T10:25:51.326053Z ERROR bevy_asset: AssetSourceId::Name(sketch_directory) must be registered before `AssetPlugin` (typically added as part of `DefaultPlugins`)
2026-04-23T10:25:51.337601Z  INFO bevy_pbr::cluster: GPU clustering is supported on this device.
2026-04-23T10:25:51.337628Z  INFO bevy_render::batching::gpu_preprocessing: GPU preprocessing is fully supported on this device.
2026-04-23T10:25:51.338169Z ERROR bevy_asset::server: Asset Source 'AssetSourceId::Name(sketch_directory)' does not exist

thread '<unnamed>' (3181393) panicked at /root/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/glfw-0.60.0/src/lib.rs:643:5:
GLFW Error: Wayland: Platform not initialized
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

thread '<unnamed>' (3181393) panicked at /rustc/59807616e1fa2540724bfbac14d7976d7e4a3860/library/core/src/panicking.rs:225:5:
panic in a function that cannot unwind
stack backtrace:
   0:     0x74ac153e35fa - <<std[e28293b1aa0f68bd]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[c1f1a4ba060b9bfa]::fmt::Display>::fmt
   1:     0x74ac153fcd2a - core[c1f1a4ba060b9bfa]::fmt::write
   2:     0x74ac153e90e2 - <std[e28293b1aa0f68bd]::sys::stdio::unix::Stderr as std[e28293b1aa0f68bd]::io::Write>::write_fmt
   3:     0x74ac153bfc8f - std[e28293b1aa0f68bd]::panicking::default_hook::{closure#0}
   4:     0x74ac153d9c71 - std[e28293b1aa0f68bd]::panicking::default_hook
   5:     0x74ac153d9f22 - std[e28293b1aa0f68bd]::panicking::panic_with_hook
   6:     0x74ac153bfd7a - std[e28293b1aa0f68bd]::panicking::panic_handler::{closure#0}
   7:     0x74ac153b6e99 - std[e28293b1aa0f68bd]::sys::backtrace::__rust_end_short_backtrace::<std[e28293b1aa0f68bd]::panicking::panic_handler::{closure#0}, !>
   8:     0x74ac153c0d2d - __rustc[b7974e8690430dd9]::rust_begin_unwind
   9:     0x74ac153fd46d - core[c1f1a4ba060b9bfa]::panicking::panic_nounwind_fmt
  10:     0x74ac153fd3eb - core[c1f1a4ba060b9bfa]::panicking::panic_nounwind
  11:     0x74ac153fd577 - core[c1f1a4ba060b9bfa]::panicking::panic_cannot_unwind
  12:     0x74ac11397dde - glfw::callbacks::error::callback::hb80b58d9cc0a1a3c
  13:     0x74ac16189e99 - <unknown>
  14:     0x74ac161a6fb3 - glfwGetWaylandWindow
  15:     0x74ac11387c43 - processing_glfw::GlfwContext::create_surface::h096c75f890ac6f5f
  16:     0x74ac1130b570 - mewnala::graphics::Graphics::new::h5851dc24be0e64e5
  17:     0x74ac11314eb0 - mewnala::mewnala::__pyfunction_size::h66e102dad801e98c
  18:     0x74ac11359fc2 - pyo3::impl_::trampoline::trampoline::h69b0d71d432a38db
  19:     0x74ac1135f0b0 - pyo3::impl_::trampoline::fastcall_cfunction_with_keywords::hcadc209331cacf12
  20:          0x1a753a8 - _TAIL_CALL_CALL.llvm.10772277920457571105
  21:          0x1a15414 - _PyFunction_Vectorcall
  22:          0x1a3fa46 - _PyObject_VectorcallTstate.llvm.1641162504222940260
  23:     0x74ac11312ee6 - mewnala::mewnala::__pyfunction_run::hb82fbffbecd4a5b0
  24:     0x74ac1135a0c9 - pyo3::impl_::trampoline::trampoline::h6bc5f6d88b52d23a
  25:     0x74ac11360a40 - pyo3::impl_::trampoline::noargs::h76df077edcb65ff3
  26:          0x1a753a8 - _TAIL_CALL_CALL.llvm.10772277920457571105
  27:          0x1a80de1 - _PyEval_Vector
  28:          0x1a80af1 - PyEval_EvalCode
  29:          0x1ac1f22 - run_mod.llvm.9708536742669578975
  30:          0x1c05ac7 - pyrun_file
  31:          0x1c04ee3 - _PyRun_SimpleFileObject
  32:          0x1c04910 - _PyRun_AnyFileObject
  33:          0x1c048b6 - pymain_run_file_obj
  34:          0x1c047b0 - pymain_run_file
  35:          0x1bc6d3c - Py_RunMain
  36:          0x1bc4ccd - pymain_main.llvm.12570717782130119092
  37:          0x1bc4ac5 - main
  38:     0x74ac1622a1ca - __libc_start_call_main
                               at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
  39:     0x74ac1622a28b - __libc_start_main_impl
                               at ./csu/../csu/libc-start.c:360:3
  40:          0x1bed529 - _start
  41:                0x0 - <unknown>
thread caused non-unwinding panic. aborting.

Other linked issues: #101

System information:

• OS: Linux Mint 22 x86_64
• Kernel: 6.8.0-106-generic
• Python: 3.12.3
• GPU: NVIDIA GeForce RTX 4070 Ti SUPER

[catilac]

can you share some information about how you set up your environment? how did you install mewnala? or are you running the examples from the libprocessing repo?

[johhnry]

@catilac sorry I didn't include it in my issue.

This is the setup:

$ uv init mewnala-test && cd mewnala-test
$ uv add mewnala
$ uv pip show mewnala
Name: mewnala
Version: 0.0.3
Location: /mewnala-test/.venv/lib/python3.14/site-packages
Requires: ipython, jupyter
Required-by:
# edit sketch.py
$ uv run sketch.py

I also tried with libprocessing directly calling just py-run shapes.py and I have the same error

[johhnry]

Looks like I'm using X11 on my linux machine right now, the issue seems to be that processing_glfw crate has features = ["wayland"] activated by default on linux?

[catilac]

Ah that's why. Okay we need to activate X11 -- so far only one of us uses linux and it's me and i'm on wayland. That should be the issue

[catilac]

@johhnry This might be fixed with the 0.0.5 release of mewnala. Would you like to give it another try? It's also in main if you're going to run it from the libprocessing repo :)

[johhnry]

Hi @catilac thanks for the followup, it's strange because I'm testing now from a Linux Mint machine with X11 (verified) and it crashes:

libprocessing on  main is 📦 v0.0.6 via 🦀 v1.95.0 
❯ RUST_BACKTRACE=1 just py-run shapes.py
cd crates/processing_pyo3; uv run maturin develop --release 
🍹 Building a mixed python/rust project
🔗 Found pyo3 bindings
🐍 Found CPython 3.14 at /home/joseph.henry/git/johhnry/libprocessing/crates/processing_pyo3/.venv/bin/python
Audited 2 packages in 7ms
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `draw-shapes` "../../lygia/test/wesl/shaders/draw-shapes"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `sprite-megaman` "../../lygia/test/wesl/shaders/sprite-megaman"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `worley-cellular` "../../lygia/test/wesl/shaders/worley-cellular"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `brick-tile` "../../lygia/test/wesl/shaders/brick-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `draw-stroke` "../../lygia/test/wesl/shaders/draw-stroke"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `checker-tile` "../../lygia/test/wesl/shaders/checker-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `hex-tile` "../../lygia/test/wesl/shaders/hex-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `draw-aa` "../../lygia/test/wesl/shaders/draw-aa"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `pnoise-tiling` "../../lygia/test/wesl/shaders/pnoise-tiling"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `snoise-fbm` "../../lygia/test/wesl/shaders/snoise-fbm"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `mirror-tile` "../../lygia/test/wesl/shaders/mirror-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `wavelet-vorticity` "../../lygia/test/wesl/shaders/wavelet-vorticity"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `windmill-tile` "../../lygia/test/wesl/shaders/windmill-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `tri-tile` "../../lygia/test/wesl/shaders/tri-tile"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `perlin-noise-fbm` "../../lygia/test/wesl/shaders/perlin-noise-fbm"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `const` "../../lygia/math/const"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `2mat4` "../../lygia/math/quat/2mat4"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `2mat3` "../../lygia/math/quat/2mat3"
warning: processing_render@0.0.5: skipped file/dir: not a WGSL ident `.github` "../../lygia/.github"
    Finished `release` profile [optimized] target(s) in 0.36s
⚠️ Warning: Failed to set rpath for /home/joseph.henry/git/johhnry/libprocessing/target/release/libmewnala.so: Failed to execute 'patchelf', did you install it? Hint: Try `pip install maturin[patchelf]` (or just `pip install patchelf`)
📦 Built wheel for CPython 3.14 to /tmp/.tmpog63mk/mewnala-0.0.5-cp314-cp314-linux_x86_64.whl
✏️ Setting installed package as editable
🛠 Installed mewnala-0.0.5
cd crates/processing_pyo3; uv run python ./examples/shapes.py
Uninstalled 1 package in 0.60ms
Installed 1 package in 4ms
2026-05-18T13:08:32.949114Z  WARN bevy_asset::io::source: Skip creating file watcher because path "/home/joseph.henry/.local/share/uv/python/cpython-3.14.0-linux-x86_64-gnu/bin/assets" does not exist.
2026-05-18T13:08:32.949137Z  WARN bevy_asset::io::source: AssetSourceId::Default does not have an AssetWatcher configured. Consider adding an "assets" directory.
2026-05-18T13:08:33.042310Z  INFO bevy_render::renderer: AdapterInfo { name: "NVIDIA GeForce RTX 4070 Ti SUPER", vendor: 4318, device: 9989, device_type: DiscreteGpu, device_pci_bus_id: "0000:08:00.0", driver: "NVIDIA", driver_info: "570.211.01", backend: Vulkan, subgroup_min_size: 32, subgroup_max_size: 32, transient_saves_memory: false }
2026-05-18T13:08:33.429390Z  INFO bevy_pbr::cluster: GPU clustering is supported on this device.
2026-05-18T13:08:33.429428Z  INFO bevy_render::batching::gpu_preprocessing: GPU preprocessing is fully supported on this device.
2026-05-18T13:08:33.430378Z  INFO processing_render::sketch: source="from mewnala import *\nfrom math import pi, sin, cos\n\nt = 0.0\n\ndef setup():\n    size(600, 600)\n\ndef draw():\n    global t\n    background(235, 230, 222)\n\n    fill(51, 76, 127, 64)\n    stroke_weight(1.5)\n    stroke(38, 51, 89)\n\n    n = 8\n    begin_shape(POLYGON)\n    for i in range(n + 3):\n        idx = (i + n - 1) % n\n        angle = idx * 2 * pi / n\n        r = 100 + 30 * sin(t * 2 + idx * 0.8)\n        curve_vertex(170 + r * cos(angle), 200 + r * sin(angle))\n    end_shape(CLOSE)\n\n    fill(38, 127, 76, 51)\n    stroke_weight(1)\n    stroke(25, 89, 51)\n\n    pcx = 430\n    pcy = 200\n    s = 70 + 10 * sin(t * 1.5)\n\n    begin_shape(POLYGON)\n    vertex(pcx, pcy - s)\n    bezier_vertex(pcx + s, pcy - s, pcx + s, pcy + s, pcx, pcy + s)\n    bezier_vertex(pcx - s, pcy + s, pcx - s, pcy - s, pcx, pcy - s)\n    end_shape(CLOSE)\n\n    fill(204, 89, 25, 38)\n    no_stroke()\n\n    begin_shape(TRIANGLE_FAN)\n    vertex(170, 450)\n    for i in range(17):\n        angle = i * 2 * pi / 16\n        r = 60 + 20 * sin(t * 3 + angle * 2)\n        vertex(170 + r * cos(angle), 450 + r * sin(angle))\n    end_shape(CLOSE)\n\n    fill(127, 51, 153, 51)\n    stroke_weight(0.5)\n    stroke(76, 25, 102, 102)\n\n    begin_shape(TRIANGLE_STRIP)\n    for i in range(16):\n        x = 320 + i * 17\n        wave = 30 * sin(t * 2 + i * 0.4)\n        vertex(x, 420 + wave)\n        vertex(x, 480 + wave)\n    end_shape()\n\n    t += 0.02\n\nrun()\n"

thread '<unnamed>' (3445348) panicked at /home/joseph.henry/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/glfw-0.60.0/src/lib.rs:643:5:
GLFW Error: Wayland: Platform not initialized
stack backtrace:
   0: __rustc::rust_begin_unwind
   1: core::panicking::panic_fmt
   2: glfw::fail_on_errors
   3: core::ops::function::FnMut::call_mut
   4: std::thread::local::LocalKey<T>::with
   5: glfw::callbacks::error::callback
   6: _glfwInputError
   7: glfwGetWaylandWindow
   8: processing_glfw::GlfwContext::create_surface
   9: mewnala::graphics::Graphics::new
  10: mewnala::create_graphics_context
  11: mewnala::mewnala::__pyfunction_size
  12: pyo3::impl_::trampoline::trampoline
  13: pyo3::impl_::trampoline::fastcall_cfunction_with_keywords
  14: _TAIL_CALL_CALL.llvm.10772277920457571105
  15: _PyFunction_Vectorcall
  16: _PyObject_VectorcallTstate.llvm.1641162504222940260
  17: mewnala::mewnala::__pyfunction_run
  18: pyo3::impl_::trampoline::trampoline
  19: pyo3::impl_::trampoline::noargs
  20: _TAIL_CALL_CALL.llvm.10772277920457571105
  21: _PyEval_Vector
  22: PyEval_EvalCode
  23: run_mod.llvm.9708536742669578975
  24: pyrun_file
  25: _PyRun_SimpleFileObject
  26: _PyRun_AnyFileObject
  27: pymain_run_file_obj
  28: pymain_run_file
  29: Py_RunMain
  30: pymain_main.llvm.12570717782130119092
  31: main
  32: __libc_start_call_main
             at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
  33: __libc_start_main_impl
             at ./csu/../csu/libc-start.c:360:3
  34: _start
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

thread '<unnamed>' (3445348) panicked at /rustc/59807616e1fa2540724bfbac14d7976d7e4a3860/library/core/src/panicking.rs:225:5:
panic in a function that cannot unwind
stack backtrace:
   0:     0x7404127d3d5a - <<std[e28293b1aa0f68bd]::sys::backtrace::BacktraceLock>::print::DisplayBacktrace as core[c1f1a4ba060b9bfa]::fmt::Display>::fmt
   1:     0x7404127ed4fa - core[c1f1a4ba060b9bfa]::fmt::write
   2:     0x7404127d98b2 - <std[e28293b1aa0f68bd]::sys::stdio::unix::Stderr as std[e28293b1aa0f68bd]::io::Write>::write_fmt
   3:     0x7404127b03ef - std[e28293b1aa0f68bd]::panicking::default_hook::{closure#0}
   4:     0x7404127ca3d1 - std[e28293b1aa0f68bd]::panicking::default_hook
   5:     0x7404127ca682 - std[e28293b1aa0f68bd]::panicking::panic_with_hook
   6:     0x7404127b04da - std[e28293b1aa0f68bd]::panicking::panic_handler::{closure#0}
   7:     0x7404127a75f9 - std[e28293b1aa0f68bd]::sys::backtrace::__rust_end_short_backtrace::<std[e28293b1aa0f68bd]::panicking::panic_handler::{closure#0}, !>
   8:     0x7404127b148d - __rustc[b7974e8690430dd9]::rust_begin_unwind
   9:     0x7404127edc3d - core[c1f1a4ba060b9bfa]::panicking::panic_nounwind_fmt
  10:     0x7404127edbbb - core[c1f1a4ba060b9bfa]::panicking::panic_nounwind
  11:     0x7404127edd47 - core[c1f1a4ba060b9bfa]::panicking::panic_cannot_unwind
  12:     0x74040e52f96e - glfw::callbacks::error::callback::hfcc26bf3af7f0c3f
  13:     0x74040bf79f1c - _glfwInputError
  14:     0x74040bfa8b39 - glfwGetWaylandWindow
  15:     0x74040e50fdc3 - processing_glfw::GlfwContext::create_surface::h4139fe9e436fcc76
  16:     0x74040e47b832 - mewnala::graphics::Graphics::new::hb1e1fabdc330587a
  17:     0x74040e50867a - mewnala::create_graphics_context::h516b81ad392ea52b
  18:     0x74040e488fcb - mewnala::mewnala::__pyfunction_size::ha5a0cf663baf3b1d
  19:     0x74040e4b2c42 - pyo3::impl_::trampoline::trampoline::h65255ebd93d0e44e
  20:     0x74040e4b7d80 - pyo3::impl_::trampoline::fastcall_cfunction_with_keywords::h7d2cc8b3fee1bdc5
  21:          0x1a753a8 - _TAIL_CALL_CALL.llvm.10772277920457571105
  22:          0x1a15414 - _PyFunction_Vectorcall
  23:          0x1a3fa46 - _PyObject_VectorcallTstate.llvm.1641162504222940260
  24:     0x74040e4853a8 - mewnala::mewnala::__pyfunction_run::hcf0fca8789c3bd91
  25:     0x74040e4b2909 - pyo3::impl_::trampoline::trampoline::h2f98f55dd9618b8f
  26:     0x74040e4bc290 - pyo3::impl_::trampoline::noargs::h86f9ae18454881e0
  27:          0x1a753a8 - _TAIL_CALL_CALL.llvm.10772277920457571105
  28:          0x1a80de1 - _PyEval_Vector
  29:          0x1a80af1 - PyEval_EvalCode
  30:          0x1ac1f22 - run_mod.llvm.9708536742669578975
  31:          0x1c05ac7 - pyrun_file
  32:          0x1c04ee3 - _PyRun_SimpleFileObject
  33:          0x1c04910 - _PyRun_AnyFileObject
  34:          0x1c048b6 - pymain_run_file_obj
  35:          0x1c047b0 - pymain_run_file
  36:          0x1bc6d3c - Py_RunMain
  37:          0x1bc4ccd - pymain_main.llvm.12570717782130119092
  38:          0x1bc4ac5 - main
  39:     0x74041362a1ca - __libc_start_call_main
                               at ./csu/../sysdeps/nptl/libc_start_call_main.h:58:16
  40:     0x74041362a28b - __libc_start_main_impl
                               at ./csu/../csu/libc-start.c:360:3
  41:          0x1bed529 - _start
  42:                0x0 - <unknown>
thread caused non-unwinding panic. aborting.
error: Recipe `py-run` failed on line 15 with exit code 134