[INFO] fetching crate linux-drm 0.5.0...
[INFO] testing linux-drm-0.5.0 against 1.90.0 for beta-1.91-3
[INFO] extracting crate linux-drm 0.5.0 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate linux-drm 0.5.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate linux-drm 0.5.0
[INFO] tweaked toml for crates.io crate linux-drm 0.5.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate linux-drm 0.5.0 on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate linux-drm 0.5.0 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" "+1.90.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ptr_meta v0.3.0
[INFO] [stderr]   Downloaded linux-io v0.12.0
[INFO] [stderr]   Downloaded ptr_meta_derive v0.3.0
[INFO] [stderr]   Downloaded linux-unsafe v0.12.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6cff7c000ad74723dac1104d4f02562567198f982f8d9744a4c978f94f69c429
[INFO] running `Command { std: "docker" "start" "-a" "6cff7c000ad74723dac1104d4f02562567198f982f8d9744a4c978f94f69c429", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6cff7c000ad74723dac1104d4f02562567198f982f8d9744a4c978f94f69c429", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cff7c000ad74723dac1104d4f02562567198f982f8d9744a4c978f94f69c429", kill_on_drop: false }`
[INFO] [stdout] 6cff7c000ad74723dac1104d4f02562567198f982f8d9744a4c978f94f69c429
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dfa17371af7efae6f2854d323f54dd47bd563be4407249062eb963f1a3d69fe0
[INFO] running `Command { std: "docker" "start" "-a" "dfa17371af7efae6f2854d323f54dd47bd563be4407249062eb963f1a3d69fe0", kill_on_drop: false }`
[INFO] [stderr]    Compiling linux-unsafe v0.12.0
[INFO] [stderr]    Compiling linux-io v0.12.0
[INFO] [stderr]    Compiling linux-drm v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:19:47
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(not(feature = "stable_polyfill"), feature(ptr_metadata))]
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:20:47
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(not(feature = "stable_polyfill"), feature(ascii_char))]
[INFO] [stdout]    |                                               ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `linux-drm` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "dfa17371af7efae6f2854d323f54dd47bd563be4407249062eb963f1a3d69fe0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dfa17371af7efae6f2854d323f54dd47bd563be4407249062eb963f1a3d69fe0", kill_on_drop: false }`
[INFO] [stdout] dfa17371af7efae6f2854d323f54dd47bd563be4407249062eb963f1a3d69fe0