Shader processing error log contains escaped ANSI sequences

Bevy version and features

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What you did

Load shaders that contain errors.

What went wrong

Error message contain sanitized ANSI escape sequences, which make it unreadable.

ERROR bevy_render::render_resource::pipeline_cache: failed to process shader error:
\x1b[0m\x1b[1m\x1b[38;5;9merror\x1b[0m\x1b[1m: failed to build a valid final module: Entry point fragment at Fragment is invalid\x1b[0m
   \x1b[0m\x1b[36m┌─\x1b[0m shaders/custom_material.wgsl:13:12
   \x1b[0m\x1b[36m│\x1b[0m
\x1b[0m\x1b[36m13\x1b[0m \x1b[0m\x1b[36m│\x1b[0m     return \x1b[0m\x1b[31m(material_color * textureSample(material_color_texture, material_color_sampler, mesh.uv) * "shaders/custom_material_import.wgsl"::COLOR_MULTIPLIER).rgb\x1b[0m;
   \x1b[0m\x1b[36m│\x1b[0m            \x1b[0m\x1b[31m^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^\x1b[0m \x1b[0m\x1b[31mnaga::ir::Expression [10]\x1b[0m
   \x1b[0m\x1b[36m│\x1b[0m
   \x1b[0m\x1b[36m=\x1b[0m The `return` expression Some([10]) does not match the declared return type Some([0])

Additional information

This is probably caused by tokio-rs/tracing@4c52ca5 (tracing-subscriber 0.3.20). It seems like users can no longer output logs with ANSI escape sequences.

This is a tracing-subscriber 0.3.20 change, ansi codes are no longer allowed in log content regardless of with_ansi configuration.

This log is being colorized by naga-oil and can be worked-around user side by setting NO_COLOR.

NO_COLOR=true cargo run

ERROR bevy_render::render_resource::pipeline_cache: failed to process shader error:
error: no definition in scope for identifier: `psbr_input`
    ┌─ shaders/terrain.wgsl:101:15
    │
101 │     let uv = (psbr_input.material.uv_transform * vec3(in.uv, 1.)).xy;
    │               ^^^^^^^^^^ unknown identifier
    │
    = no definition in scope for identifier: `psbr_input`

@james7132

Should we just pin our tracing-subscriber version for now?

EDIT: @james7132 replies: " Given it's a security vulnerability, I would rather us not do so."

bevyengine/naga_oil#129

Temporarily disable color on logs due to tracing regression (#129)

Fixed (well, mitigated) by the new naga_oil release.

Stop rendering escaped ANSI sequences in wesl errors (bevyengine#25464)

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Shader processing error log contains escaped ANSI sequences #21164

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Shader processing error log contains escaped ANSI sequences #21164

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Bevy version and features

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ChristopherBiscardi commented on Sep 22, 2025

alice-i-cecile commented on Sep 22, 2025

tychedelia commented on Sep 23, 2025

alice-i-cecile commented on Sep 26, 2025

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