[INFO] fetching crate retro-display 0.1.0...
[INFO] testing retro-display-0.1.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate retro-display 0.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] removed /workspace/builds/worker-7-tc2/source/.cargo/config.toml
[INFO] started tweaking crates.io crate retro-display 0.1.0
[INFO] finished tweaking crates.io crate retro-display 0.1.0
[INFO] tweaked toml for crates.io crate retro-display 0.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate retro-display 0.1.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate retro-display 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a759fd5e0f7168df2eadc2c20a05ed72d72834594b60629176a629841daca697
[INFO] running `Command { std: "docker" "start" "-a" "a759fd5e0f7168df2eadc2c20a05ed72d72834594b60629176a629841daca697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a759fd5e0f7168df2eadc2c20a05ed72d72834594b60629176a629841daca697", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a759fd5e0f7168df2eadc2c20a05ed72d72834594b60629176a629841daca697", kill_on_drop: false }`
[INFO] [stdout] a759fd5e0f7168df2eadc2c20a05ed72d72834594b60629176a629841daca697
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 089b41c14ebec59f6012bec40d2414bd601804a00dfedfe2374410e90423f18b
[INFO] running `Command { std: "docker" "start" "-a" "089b41c14ebec59f6012bec40d2414bd601804a00dfedfe2374410e90423f18b", kill_on_drop: false }`
[INFO] [stderr]    Compiling az v1.2.1
[INFO] [stderr]    Compiling byteorder v1.5.0
[INFO] [stderr]    Compiling embedded-graphics-core v0.4.0
[INFO] [stderr]    Compiling retro-display v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:18:1
[INFO] [stdout]    |
[INFO] [stdout] 18 | #![feature(const_trait_impl)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_convert`
[INFO] [stdout]   --> src/c64.rs:45:12
[INFO] [stdout]    |
[INFO] [stdout] 45 | impl const From<Gray8> for VicIIPalette {
[INFO] [stdout]    |            ^^^^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143773 <https://github.com/rust-lang/rust/issues/143773> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_convert`
[INFO] [stdout]   --> src/c64.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 58 | impl const From<Rgb555> for VicIIPalette {
[INFO] [stdout]    |            ^^^^^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143773 <https://github.com/rust-lang/rust/issues/143773> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_convert`
[INFO] [stdout]   --> src/c64.rs:65:12
[INFO] [stdout]    |
[INFO] [stdout] 65 | impl const From<Rgb888> for VicIIPalette {
[INFO] [stdout]    |            ^^^^^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143773 <https://github.com/rust-lang/rust/issues/143773> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_convert`
[INFO] [stdout]   --> src/c64.rs:71:12
[INFO] [stdout]    |
[INFO] [stdout] 71 | impl const From<VicIIPalette> for Rgb888 {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143773 <https://github.com/rust-lang/rust/issues/143773> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: const `impl` for trait `PixelColor` which is not `const`
[INFO] [stdout]   --> src/c64.rs:94:12
[INFO] [stdout]    |
[INFO] [stdout] 94 | impl const PixelColor for VicIIPalette {
[INFO] [stdout]    |            ^^^^^^^^^^ this trait is not `const`
[INFO] [stdout]    |
[INFO] [stdout]    = note: marking a trait with `const` ensures all default method bodies are `const`
[INFO] [stdout]    = note: adding a non-const method body in the future would be a breaking change
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: const `impl` for trait `OriginDimensions` which is not `const`
[INFO] [stdout]    --> src/c64.rs:150:12
[INFO] [stdout]     |
[INFO] [stdout] 150 | impl const OriginDimensions for PetsciiDisplay {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^^^ this trait is not `const`
[INFO] [stdout]     |
[INFO] [stdout]     = note: marking a trait with `const` ensures all default method bodies are `const`
[INFO] [stdout]     = note: adding a non-const method body in the future would be a breaking change
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Gray8: [const] From<Rgb555>` is not satisfied
[INFO] [stdout]    --> src/c64.rs:60:9
[INFO] [stdout]     |
[INFO] [stdout]  60 |         Gray8::from(value).into()
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: trait `From` is implemented but not `const`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-graphics-core-0.4.0/src/pixelcolor/conversion.rs:94:11
[INFO] [stdout]     |
[INFO] [stdout]  94 |         $(impl From<$rgb_type> for $gray_type {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 | impl_rgb_to_and_from_gray!(Gray2, Gray4, Gray8 => Rgb555, Bgr555, Rgb565, Bgr565, Rgb666, Bgr666, Rgb888, Bgr888);
[INFO] [stdout]     | ----------------------------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     = note: the full name for the type has been written to '/opt/rustwide/target/debug/deps/retro_display-e7ea7e9b089c5954.long-type-6570249121112369223.txt'
[INFO] [stdout]     = note: consider using `--verbose` to print the full type name to the console
[INFO] [stdout]     = note: this error originates in the macro `impl_rgb_to_and_from_gray` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: the trait bound `Gray8: [const] From<Rgb888>` is not satisfied
[INFO] [stdout]    --> src/c64.rs:67:9
[INFO] [stdout]     |
[INFO] [stdout]  67 |         Gray8::from(value).into()
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout] note: trait `From` is implemented but not `const`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-graphics-core-0.4.0/src/pixelcolor/conversion.rs:94:11
[INFO] [stdout]     |
[INFO] [stdout]  94 |         $(impl From<$rgb_type> for $gray_type {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 | impl_rgb_to_and_from_gray!(Gray2, Gray4, Gray8 => Rgb555, Bgr555, Rgb565, Bgr565, Rgb666, Bgr666, Rgb888, Bgr888);
[INFO] [stdout]     | ----------------------------------------------------------------------------------------------------------------- in this macro invocation
[INFO] [stdout]     = note: the full name for the type has been written to '/opt/rustwide/target/debug/deps/retro_display-e7ea7e9b089c5954.long-type-442114740396540255.txt'
[INFO] [stdout]     = note: consider using `--verbose` to print the full type name to the console
[INFO] [stdout]     = note: this error originates in the macro `impl_rgb_to_and_from_gray` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0015]: cannot call non-const method `<embedded_graphics_core::pixelcolor::Gray8 as embedded_graphics_core::pixelcolor::GrayColor>::luma` in constant functions
[INFO] [stdout]   --> src/c64.rs:47:21
[INFO] [stdout]    |
[INFO] [stdout] 47 |         match value.luma() {
[INFO] [stdout]    |                     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: method `luma` is not const because trait `GrayColor` is not const
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/embedded-graphics-core-0.4.0/src/pixelcolor/gray_color.rs:7:1
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub trait GrayColor: PixelColor {
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ this trait is not const
[INFO] [stdout]  8 |     /// Returns the luma channel value.
[INFO] [stdout]  9 |     fn luma(&self) -> u8;
[INFO] [stdout]    |     --------------------- this method is not const
[INFO] [stdout]    = help: const traits are not yet supported on stable Rust
[INFO] [stdout]    = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0015, E0277, E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0015`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `retro-display` (lib) due to 10 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "089b41c14ebec59f6012bec40d2414bd601804a00dfedfe2374410e90423f18b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "089b41c14ebec59f6012bec40d2414bd601804a00dfedfe2374410e90423f18b", kill_on_drop: false }`
[INFO] [stdout] 089b41c14ebec59f6012bec40d2414bd601804a00dfedfe2374410e90423f18b
